Ink for digital printing on ceramic materials, method of digital printing on ceramic materials using said ink, and ceramic materials produced using said printing process
SUBSTANCE: invention relates to an ink set containing chromophoric metals for digital printing on ceramic materials. The ink set comprises liquid colouring compositions (A), (B), (C) and one from (D) and (E). The (A) comprises at least a compound of cobalt. The (B) comprises at least a compound of iron. The (C) comprises at least a compound of a metal selected from chromium, nickel and their mixtures. The (D) comprises at least a compound of cobalt and at least a compound of iron. The (E) comprises one or more compounds of zirconium. The said metal compounds decompose at a temperature of from 500 to 1300°C. When interacting with the ceramic material the metal compounds of compositions (A)-(D) form colured oxides or colured compounds. The compounds of zirconium from the composition (E) with the ceramic material form white oxides or white compounds. Also the method of decorating ceramic materials by digital printing using the specified set of ink and the decorated ceramic products produced using this method are described.
EFFECT: invention provides ceramic materials decorated with digital printing of wide range of colours with the effect of natural stone.
11 cl, 45 tbl, 5 ex
Water-based ink having the composition specified below was applied using a digital inkjet printer equipped with a cylinder Fuji Dimatix Polaris PQ 512 on ceramic tiles, obtained by the press molding, the ceramic material having the following composition:
to 96.5 wt.% ceramic mixture for porcelain stoneware "WO3", supplied Coopertiva Ceramica d mola, having the composition specified in example 1;
- 0.5 wt.% titanium dioxide;
to 3.0 wt.% silica gel having a particle size of d50=11 µm b beats. surface S=reaches 260.6 m2/g (Gr=91,86%; A=283,7 m2/g).
Test painted samples were annealed in a kiln for ceramics with a 50 minute firing cycle (cold-cold) with a maximum temperature of 1215°C. values of L*a*b* were measured on unpolished product.
- ink composition (A)comprising cobalt aspartate (6.0 wt.% Co) and water. Aspartate cobalt was obtained by the interaction 27,11 g aspartic acid and 9.3 g Co(OH)3with the Co content of 64.5 wt.% in the presence of water as solvent. The reaction mixture was stirred at 70°C to lighten, then cooled and added ammonia to pH 5.0. Then the volume of the mixture was brought to 100 g with water. Aspartate cobalt belongs to the group of radicals (iv) of paragraph 4 of the claims;
- ink composition (B)comprising methylpyridazin iron (5.0 wt.% Fe) and water. Methylpyridazin iron would is obtained by the interaction of 24.3 g traintravel salt methylpyridoxine acid (Trilon M from BASF) with 24.2 g FeCl 3·6H2O (Fe 20.7 wt.%) in the presence of water as solvent. After one hour the pH of the reaction mixture was raised to 7.5 by the addition of ammonia, and then the volume of the mixture was brought to 100 g with water. Methylpyridazin iron belongs to the group (iiib) of paragraph 4 of the claims;
- ink composition (C)comprising methylpyridazin chromium (1.55 wt.% chromium), tartrate of antimony (11,04 wt.% Sb) and water. Composition (C) was obtained by mixing appropriate quantities of water compositions tartrate of antimony and methylpyridazine chromium. This composition methylpyridazine chromium was obtained by the interaction of 26.1 g traintravel salt methylpyridoxine acid (Trilon M from BASF) from 26.2 g CrCl3·6H2O (Cr content of 19.1 wt.%) in the presence of water. The precipitate was dissolved by adding several grams of liquid ammonia and the resulting mixture was stirred at 75°C for 60 minutes, the Reaction mixture was cooled, the pH was raised to 7.5 by the addition of liquid ammonia and then the volume of the mixture was brought to 100 g with water. Methylpyridazin chromium belongs to the group (iiib) of paragraph 4 of the claims;
- ink composition (D)comprising aspartate cobalt (2.46 wt.% Co), diethylenetriaminopentaacetic iron (3.54 wt.% Fe) and water. An ink composition was obtained by mixing aqueous compositions containing aspartate cobalt obtained is output as disclosed for the composition (A) with an appropriate amount of an aqueous solution of diethylenetriaminepentaacetate iron (Ferrochelato Ellesei from Demetra) with an iron content of 6.0 wt.%. Ion diethylenetriaminepentaacetate iron belongs to the group (iiib) of paragraph 4 of the claims.
The results of the analysis of the obtained color are given in table 5.
|(A)||54,4||-2,9||- 15.2 m||Dark blue|
|Unpainted body||is 83.8||0,0||9,1|
1. Kit ink for digital printing, including:
liquid edge is asuu composition (A), comprising a solvent and at least a compound of cobalt;
liquid ink composition (C)comprising a solvent and at least a compound of iron;
liquid ink composition (C)comprising a solvent and at least a compound of the metal selected from chromium, Nickel and mixtures thereof; and
at least one of a liquid colouring composition (D) and liquid ink composition (S)with the specified liquid ink composition (D) comprises a solvent, at least a compound of cobalt and at least a compound of iron and the liquid ink composition (S) comprises a solvent and one or more compounds of zirconium,
where these metal compounds decompose when heated to a temperature of from 500 to 1300°C, preferably from 940 to 1250°C, and metal compounds of the compositions (A)to(D) form the corresponding colored oxides or colored compound formed by the interaction between the metal and ceramic material, which cause these ink; and zirconium compounds from the composition (E) white form oxides or white compound formed by the interaction between zirconium and ceramic material, which cause the specified ink set.
2. The ink set according to claim 1, wherein said solvent is selected from water, at least one fully) the constituent water of an organic solvent, or mixtures thereof.
3. The ink set according to claim 1, wherein said solvent is selected from one or more non-miscible with water and organic solvents.
4. The ink set according to claims 1 to 3, in which the said metal compounds selected from salts and/or complexes of metals with the ascorbate ion, ion acetylacetonate, ion of levulinate or ion of the carboxylate of the formula:
where R1chosen from:
(iii) a radical of the formula [I]:
in which R2, R3and R4are the same or different and independently chosen from:
iiib) -NR5R6in which R5and R6that is the same or different, is independently selected from H, linear or branched C1-C6alkyl group, possibly substituted-HE group, -(CH2)n-COOH group in which n is an integer in the range from 0 to 3, -(CH2)m-N(H)2-k-(CHR7-COOH)kgroup, in which m is an integer in the range from 1 to 6, k is 1 or 2, and R7selected from-H, -CH3and
where X and Y are independently selected from-H, -CH3-HE and-COOH;
iiic) aromatic radical of the formula
in which X and Y are the same or different and independently selected from H, -CH3-HE and-COOH;
(iv) a linear or branched, saturated or unsaturated With1-C18aliphatic radical, possibly substituted by at least one radical chosen from-OH, -SH, -(CH2)n-COOR8,
-NH2in which n has the same meaning as above and R8is N or C1-C4linear or branched alkyl group;
(v) C4-C6cycloaliphatic radical;
(vi) an aromatic radical of the formula
in which X and Y are the same or different and independently selected from H, -CH3, -OH, -COOH.
5. The ink set according to any one of claim 1 or 2, including:
the aqueous ink composition (A)containing 0.5-7.0 wt.% cobalt, comprising at least one complex of cobalt and/or cobalt salt selected from cobalt citrate, ethylenediaminetetraacetate (EDTA) cobalt and mixtures thereof, and a mixture of water and monoethylene ether of diethylene glycol as solvent;
the aqueous ink composition (C)containing 1.0 to 8.0 wt.% iron and optionally 0.5 to 3.0 wt.% zirconium, including ammonium citrate iron and, if necessary, the glycolate, zirconium, and a mixture of water and propylene glycol as solvent;
the aqueous ink composition (C2)containing 0.5 to 3.0 wt.% chromium, 2.0 to 7.5 wt.% antimony and optionally 1.5 to 5.0 wt.% titanium, including qi the rat chromium, tartrate of antimony and dihydroxybis[lactate(2-)-O1,O2]titanate(2-)diammonium, and a mixture of water and monoethylene ether of diethylene glycol as solvent; and
the aqueous ink composition (D)containing 0.5-7.0 wt.% cobalt, 1.0 to 8.0 wt.% iron and optionally 1.0 to 3.0 wt.% chromium, which includes at least a complex of cobalt and/or cobalt salt selected from cobalt citrate, cobalt EDTA and mixtures thereof; at least a compound of iron selected from ammonium citrate iron, iron EDTA and mixtures thereof, and optionally at least a chromium complex selected from chromium acetate, chromium citrate, ammonium citrate-chromium and mixtures thereof, and a mixture of water, propylene glycol and monoethylene ether of diethylene glycol as a solvent.
6. The ink set according to any one of claim 1 or 3, including:
the ink composition of (A) solvent-based, containing 4.0 to 10.0 wt.% cobalt, including 2-ethylhexanoate, cobalt, and hydrotreated petroleum distillates as solvent;
the ink composition (C) based solvents containing 2.0 to 5.0 wt.% iron and, if necessary, of 2.0 to 4.0 wt.% Zirconia containing 2-ethylhexanoate iron and optionally 2-ethylhexanoate, zirconium, and hydrotreated petroleum distillates as solvent;
the ink composition (C) based solvents containing 1.0 to 3.0 wt.% chromium, including 2-ethylhexanoate x is Ohm, and the mixture hydroacustic petroleum distillates and disutility ether of diethylene glycol as solvent; and
the ink composition (D) solvent-based, containing 1.0 to 3.0 wt.% cobalt and 2.0-5.0 wt.% iron, includes 2-ethylhexanoate, cobalt 2-ethylhexanoate iron, and hydrotreated petroleum distillates as solvent.
7. Method for the production of decorated ceramic articles, comprising the following stages:
(I) the creation of unburnt or partially burnt ceramic material including titanium dioxide and amorphous silicon dioxide;
(II) application by digital printing on ceramic material obtained in the previous phase of the ink set according to any one of claims 1 to 6;
(III) firing the ceramic material obtained in the previous stages, at a temperature of from 940 to 1300°C.
8. The method according to claim 7, characterized in that for the production of unglazed decorated ceramics at the stage of (I) a ceramic material obtained by molding a ceramic mixture comprising 0.2 to 10.0 wt.% titanium dioxide and 0.3-15.0 wt.% amorphous silicon dioxide.
9. The method according to claim 7, characterized in that for the production of unglazed decorated ceramic phase (II) is carried out by deposition on the entire surface of the preliminarily molded ceramic material is one of suspension,
(c) 40-80 wt.% solid mixture that includes
(C1) of 0.1 to 1.0 wt.% titanium dioxide;
(C2) 0.5 to 5.0 wt.% amorphous silicon dioxide; and
(C3) 99,4-94,0 wt.% traditional ceramic mixture;
(d) 20-60 wt.% water.
10. Glazed or unglazed decorated ceramic product obtained by the method according to any of claims 7 to 9.
11. Decorated ceramic product made of unglazed porcelain, obtained by the method according to any of claims 7 to 9.
SUBSTANCE: invention relates to conductive pastes for forming metal contacts on the surface of substrates for photovoltaic cells. The conductive paste is substantially free of frit glass. According to one version of the invention, the conductive paste contains organometallic components which form a solid metal oxide phase upon firing and conductive material. The organometallic components are selected from a group which includes metal carboxylates or metal alkoxides, where the metal is boron, aluminium, silicon, bismuth, zinc or vanadium. According to another version, the conductive paste includes multiple precursors which form conductive elements upon firing or heating. The paste is adapted for adhesion to the surface of a substrate and upon firing, forms a solid oxide phase while forming an electrical conductor from conductive materials on the substrate.
EFFECT: use of said conductive paste in a line of a conductive array of photovoltaic cells provides high efficiency and fill factor of the photovoltaic cell.
14 cl, 2 tbl, 2 ex
SUBSTANCE: composition for making sensor coatings contains antimony-doped tin dioxide of the formula SbxSn1-xO2, where x=0.1-0.3, and water in ratio SbxSn1-xO2:H2O = 89-87:11-13 wt %. The method of preparing the composition involves hydrothermal treatment of tin and antimony hydroxides at 170°C for 48 hours. The tin and antimony hydroxides are obtained by dissolving Sn and Sb metal in concentrated hydrochloric acid, 18-20 wt %, while adding 3-5 wt % concentrated HNO3. The obtained solution is 2-3 times diluted with distilled water and a calculated amount of ammonia solution is added. Using a simple scheme, the disclosed method enables to obtain nanoparticles of said composition SbxSn1-xO2 with size of 30 nm and surface area of 154 m2/g, which can be used as the basic component of electroconductive ink for printing sensor arrays and microcontacts.
EFFECT: low labour and power consumption.
3 cl, 6 dwg, 3 ex
SUBSTANCE: conductive paste contains frit glass, a conductive material, an organic medium and one or more organometallic components which form metal oxides when burnt. The organometallic components are selected from a group comprising a metal carboxylate and a metal alkoxide, where the metal is boron, aluminium, silicon, bismuth, zinc or vanadium. When deposited on antireflecting coating on a substrate, the conductive paste is capable of penetrating the coating to form an ohmic contact with the substrate. Described also is a photovoltaic cell, having a semiconductor substrate, an antireflecting coating and lines of a conductive mesh formed from said conductive paste.
EFFECT: high efficiency of the photovoltaic cell, improved adhesion and ohmic contact between metallic elements and the substrate through antireflecting coatings.
10 cl, 1 tbl, 2 ex
SUBSTANCE: present invention relates to use of a composition which contains: a) 0.1-20 wt % binder which contains a polycarbonate derivative based on geminally disubstituted dihydroxydiphenyl cycloalkane, b) 30-99.9 wt % solvent, c) 0-10 wt %, with respect to dry mass, dye or mixture of dyes, d) 0-10 wt % functional material or mixture of functional materials, e) 0-30 wt % additives and/or auxiliary substances or a mixture thereof, as jet printing ink. The invention also relates to a method of producing a composite and a composite which contains a polymer layer on which there is a jet printing layer of said composition.
EFFECT: invention is aimed at producing agents which enable to use jet printing in making counterfeit protected documents and/or valuable documents based on polycarbonate layers, and which enable to deposit jet printing layers on layers which meet all optical requirements, which can be coloured, wherein lamination does not deteriorate optical properties of the layers and said layers do not act as a separating layer and facilitate formation of a monolithic composite.
31 cl, 2 tbl, 2 dwg, 8 ex
SUBSTANCE: invention relates to jet printing inks, particularly non-aqueous inks for jet printing. The ink for jet printing contains a pigment, binder, polyetheramide resin as a pigment dispersant, an organic solvent and an anti-corrosion agent from an imidazole group or a group of volatile anti-corrosion agents, preferably dicyclohexylamine or cyclohexylammonium cyclohexylcarbamate.
EFFECT: disclosed inks have high dispersion stability and prevent corrosion of print heads of jet printers and nozzle clogging.
8 cl, 8 tbl, 34 ex
FIELD: food industry.
SUBSTANCE: proposed print compound in the form of print ink or print varnish includes a binding substance with a resinous component and a solvent component. The binding substance solvent represents a one-component or multicomponent saturated resin solvent and a food product or food additive of a number of monoglycerides and/or diglycerides and/or triglycerides. Preferably, the binding substance solvent component includes acetylated or esterified monoglycerides and/or acetylated or esterified diglycerides and/or acetylated or esterified triglycerides.
EFFECT: print ink solvent migration degree reduction and treatment simplification in view of the possibility of the print compound drying-out by way of absorption and re-varnishing exclusion.
4 cl, 3 ex
FIELD: printing industry.
SUBSTANCE: proposed invention relates to a printing item comprising a substrate and a combination of printed inks including six colours. Each of colours is defined with a full tone and a half-tone of the specified colour, at the same time each ink has a value of colour difference dE of the combined full tone L-C-H-a-b, which is less than or equal to 2, and a value dE of the combined half-tone, which is less or equal to 3.
EFFECT: invention provides for production of printing items, which reproduce patterns with high accuracy.
7 cl, 1 dwg
FIELD: textiles and paper.
SUBSTANCE: non-woven fabric is proposed, on the visible surface of which the ink composition is applied comprising from about 40 wt % to about 80 wt % of the dry weight of the ink of linking agent - aziridine oligomer with at least two aziridine functional groups. Also an absorbing article is proposed comprising a liquid-permeable upper layer, an absorbing core and a liquid-impermeable lower layer that contains the specified non-woven fabric with the said applied ink composition. The application of ink on the non-woven fabric can be carried out by the method of flexography or a method of ink-jet printing.
EFFECT: printed non-woven fabric has high resistance to abrasion even in case of its contacting with fatty substance.
16 cl, 2 dwg, 2 tbl, 2 ex
FIELD: printing industry.
SUBSTANCE: waterless ink composition for inkjet printing contains a pigment, a polymer in an amount of 1 to 20 wt % in terms of total weight, dispersing of pigment, organic solvent, and alcohol containing an amino group in an amount of 0.01 to 3 wt % in terms of total weight. The alcohol containing an amino group is selected from the group consisting of 2-amino-1-butanol, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-ethyl-1,3-propanediol and tris(hydroxymethyl) aminomethane. As the polymer the ink contains polyester, acrylic resin or polyvinyl chloride. The aqueous extract of the said waterless ink composition has pH ranging from 6.0 to 10.0.
EFFECT: increased stability of its pressure injection and the absence of clogging the nozzle of the print head with achievement of high quality printing.
7 cl, 1 tbl, 5 ex
SUBSTANCE: disclosed is complex of ceramic particles, which contains multitude of separate loose particles, which can be applied in a range different industrial processes and products, including, for instance, abrasive media as granular coating of roofing shingles based on bitumen, as filtering medium for liquids, as sand substituent in processes of casting on melted models and as propants in drilling works with DTH hammer, in which ceramic particles can be named propants. This multitude has complete weight and granulometric composition of particles. Effective width of granulometric composition exceeds 100 microns and contains three adjoining and non-crossing areas, which include first area, second area and third area. First area adjoins second area, and second area adjoins third area. Width of second area constitutes, at least, 25% of effective width. Weight of particles in second area does not exceed 15% of complete weight of multitude of particles. Weight of particles in first area and third area each exceeds weight of particles in second area.
EFFECT: complex of particles, possessing certain characteristics for increasing resistance to crushing, specific conductivity and stability to sedimentation with simultaneous reduction of production costs for enterprise producing ceramic particles.
24 cl, 2 tbl, 4 dwg, 1 ex
SUBSTANCE: boron suboxide-based composite material contains boron suboxide and a second phase in bound form, the second phase containing a boride and uniformly distributed in the boron suboxide. The composite material has crack resistance of more than 3.5 MPa·m0.5, and hardness of more than 25 GPa. The borides are selected from a group comprising borides of group IV-VIII transition metals and borides of platinum group metals. In particular, the boride can be selected from a group comprising borides of iron, cobalt, nickel, titanium, tungsten, hafnium, tantalum, zirconium, rhenium, molybdenum, chromium, manganese and niobium. The boride can also be a boride of a platinum group metal, preferably palladium boride. Furthermore, the second phase can contain one or more oxides. According to the disclosed method of producing the composite material, a boron suboxide source is brought into contact with a boride or source thereof and the obtained mass is sintered at temperature of 1750-1900°C.
EFFECT: obtaining boron suboxide-based materials with high strength and crack resistance.
22 cl, 22 ex, 1 tbl, 4 dwg
SUBSTANCE: composite material contains boron suboxide and a second phase which contains a mixture of at least two metal oxides, neither of which is a boron-containing oxide. At least one of the oxides can be selected from a group comprising oxides of group IIA, IIIA and IVA elements. Also, at least one of the oxides can be a rare-earth metal oxide selected from a group comprising oxides of scandium, yttrium and lanthanide elements. The second phase of the composite material can also contain a boride and particularly a boride selected from a group comprising borides of group IV-VIII transition metals. To produce the composite material, boron suboxide grains are mixed with metal oxides and the reaction mass is sintered at temperature of 1740-1900°C and pressure of 200 MPa.
EFFECT: improved crack resistance of the composite material.
22 cl, 13 ex, 1 tbl, 5 dwg
SUBSTANCE: boron suboxide-based composite material contains boron suboxide and a second phase which contains a rare-earth metal oxide in amount of up to 20 vol. %. The rare-earth metal oxide can be selected from a group comprising oxides of scandium, preferably yttrium and lanthanide elements, and can also be a mixture of rare-earth metal oxides. Besides rare-earth metal oxide(s), the second phase can also contain one oxide or a mixture of oxides of group IIA, IIIA and IVA elements, preferably aluminium oxide and optionally a boride selected from a group comprising borides of transition metals: iron, cobalt, nickel, titanium, tungsten, tantalum, hafnium, zirconium, rhenium, molybdenum and chromium. The composite material is obtained by sintering at pressure below 200 MPa and temperature lower than 1900°C.
EFFECT: high wear resistance of the composite material.
21 cl, 13 ex, 1 tbl, 2 dwg
SUBSTANCE: solid electrolyte based on hafnium oxide contains hafnium oxide with oxide additives and is characterised by that the electrolyte contains hafnium oxide with scandium and yttrium oxide additives, and has the formula (1-x-y) HfO2+xSc2O3+yY2O3, where 0.07≤x≤0.1 and 0.01≤y≤0.04.
EFFECT: obtaining a solid electrolyte based on HfO2, having a stable structure and electroconductivity, which matches or surpasses electroconductivity of the best analogue.
1 tbl, 2 dwg
SUBSTANCE: invention relates to ceramic powder, as well as a ceramic layer and a multilayer material obtained from said powder, and can be used to produce heat-insulating materials. The powder contains pyrochlore phase of general formula AxByOz c x, y = 2, z = 7, where A= Gd or Sm, or Nd, or La, or Y, B= Hf or Zr, or Ti, or Sn, C= Hf or Zr, or Ti, or Sn, and a secondary oxide CrOs with r, s>0 with content of 0.5-10 wt %. The disclosed ceramic layer (13) is obtained from said ceramic powder, wherein the multilayer material has a base (4) and said ceramic layer (13).
EFFECT: improved heat-insulating properties of the material.
37 cl, 5 dwg
SUBSTANCE: invention relates to a composition for producing refractory materials and a method of preparing said composition. The composition for producing refractory materials contains one or more ground refractory components and one more binding agents. The ground refractory component contains particles with average diameter greater than 0.3 mcm, and the binding agent is selected from a group comprising the following, in wt %: very finely ground binding agent containing particles with average diameter ranging from 10 nm to 0.3 mcm, selected from a group comprising aluminium oxide, titanium dioxide, zirconium dioxide and/or mixed oxides of said compounds 0.05-50; inorganic binding agent 0-20; hydraulically hardening binding agent 0-20; organic binding agent which does not contain silicon 0-15. The composition additionally contains 3-15 wt % water, where the fraction of the ground refractory component is equal to 100, and content of other materials in the composition expressed in percentages is expressed in terms of the ground component.
EFFECT: high strength and corrosion resistance of the articles.
20 cl, 8 ex, 8 tbl
SUBSTANCE: invention relates to a burnt refractory ceramic product. The burnt refractory ceramic product with open porosity of 10-30 vol. %, is made from a mixture which contains finely dispersed refractory material with grain size d90 less than 100 mcm - 50-90 wt %;coarse refractory material with grain size d90 greater than 500 mcm - 10-50 wt %; refractory material with grain size d90 100-500 mcm up to 10 wt % and a component which forms melt liquid phase at application temperature of up to 1500°C in amount of less than 5 wt %.
EFFECT: high heat resistance, compression strength and low gas-permeability.
13 cl, 3 dwg
SUBSTANCE: high density gallium oxide-zinc oxide sintered sputtering target for forming transparent electro-conductive film contains 20 mln-1 by weight or more of each of oxides of zirconium and oxide of aluminium, at that common contents are less than 250 mln-1, also value of volume resistance of target is 3.0 mOhm cy or less. Transparent electro-conductive film is formed on glass substrate by means of sputtering with implementation of gallium oxide-zinc oxide target. Film contains zirconium oxide and aluminium oxide, amount of each is 20 mln-1 by weight or more, while common contents are less, than 250 mln-1. Method of forming transparent electro-conductive film includes sputtering with implementation of gallium oxide-zinc oxide target.
EFFECT: production of transparent electro-conductive film capable to maintain preferable coefficient of transmission in optic region and electric conductivity.
7 cl, 1 tbl, 10 ex
SUBSTANCE: invention relates to monolithic refractories, and more specifically to mixtures used for closing tap-holes of blast-furnaces after tapping cast iron and slag. The tap-hole mix contains a refractory component, consisting of oxide and carbon-bearing materials and silicon carbide, and a binding component, consisting of refractory clay and a plasticiser. The refractory component also contains a composite material based on silicon nitride with ferrosilicide binding material, containing iron silicide, silicon and/or iron, in the following ratio of components in wt %: silicon nitride - 60.0 to 95.0; iron silicide - 0.1 to 38.0; silicon - 0.1 to 23.0; iron - 0.1 to 8.0; components of the tap-hole mix are in the following ratio, wt %: refractory component - 50 to 80; binding component - 20 to 50.
EFFECT: increased strength of tap-hole mix.
2 cl, 1 ex, 1 tbl
SUBSTANCE: invention relates to compositions of engobes, which can be applied in production of articles of building ceramics (bricks, tiles, etc.). Engobe includes white-burning clay, milled broken window sheet glass, colouring additive, milled quartz sand and sulfite-alcohol mash with the following component ratio, wt %: white-burning clay - 78.0-82.8; milled broken window sheet glass - 7.0-9.0; colouring additive - 0.5-5.0; milled quartz sand - 7.0-9.0; sulfite-alcohol mash - 0.8-1.2.
EFFECT: increase of engobe frost resistance.