314 results about "Barium carbonate" patented technology

The invention discloses a matte glaze and a preparation method thereof. The matte glaze comprises the following components by weight: 1-5 parts of zinc oxide, 5-15 parts of barium carbonate, 0-15 parts of zirconium silicate, 10-25 parts of potassium feldspar, 10-20 parts of kaolin, 5-15 parts of calcite, 5-15 parts of calcined talcum powder, 20-35 parts of a matte frit and 0.5-1 part of an additive. Specifically, the matte frit comprises the following components by weight: 30-50 parts of SiO2, 15-20 parts of Al2O3, 0.01-0.5 part of Fe2O3, 3-10 parts of CaO, 0.5-5 parts of MgO, 1-5 parts of K2O, 3-10 parts of Na2O, 3-10 parts of ZnO, 0.1-1 part of B2O3 and 10-25 parts of BaO. By introducing the matte frit, the melting temperature of the formula is lowered, the firing range of the formula isbroadened, and the glaze texture achieves a fine matte effect.

The invention discloses a fluoride salt-free nitrate-free cast iron enamel semitransparent glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, sodium carbonate, potassium carbonate, calcium carbonate, potassium feldspar, zinc oxide, lithium carbonate, zirconium silicate, titanium dioxide, aluminum oxide, trisodium phosphate, antimony oxide, magnesium carbonate and barium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for cast iron matrixes, the firing temperature is 740-760 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention relates to the technical field of glazes, and particularly discloses an antifouling glaze with a snow velvet effect and a preparation method thereof. The glaze comprises the following raw materials in parts by weight: 35-45 parts of quartz stone, 4-6 parts of zinc oxide, 7-8 parts of strontium carbonate, 4-5 parts of barium carbonate, 7-9 parts of calcite, 8-10 parts of talc, 5-8 parts of kaolin, 0.01-0.1 part of titanium dioxide and 1-5 parts of a microcapsule repairing agent. According to the glaze, a large number of fine willemite crystals can be separated out, so that a flickering crystal flower effect is generated, and a glass phase between the crystals is very compact, so that the unification of a visual effect and an antifouling function is realized. Even if the surface is scrubbed to generate scratches, the surface can be recovered through self-repairing, so that the antifouling effect is further improved.

The invention discloses a concave-convex high-skid-resistance archaized brick and a preparation process thereof, and relates to the field of building materials. When the concave-convex high-skid-resistance archaized brick is prepared, ferrochrome waste residues, coal ash, argil, quartz sand, clay powder and red soil powder are subjected to mold pressing and roasting, and a green brick is prepared; mixing albite, quartz, calcite, zinc oxide, barium carbonate, deionized water, water glass and American water, glazing the surface of a green brick, and roasting to obtain an archaized brick matrix; the archaized brick base body is sequentially subjected to a reaction with 3-aminopropyltrimethoxysilane, 5, 7-dihydroxyflavone, 1H, 1H-perfluorooctylamine and 1, 3-propane sultone, and the concave-convex high-skid-resistance archaized brick is prepared. The concave-convex high-skid-resistance archaized brick prepared by the invention has good antibacterial, antifouling and coating durability effects.

The invention relates to the technical field of barium carbonate preparation, and provides a barium carbonate synthesis reactor and an application method thereof.The barium carbonate synthesis reactor comprises a tower body, a reaction pipe, a flow guide pipe and a sprayer, and the tower body, the reaction pipe and the flow guide pipe are coaxially arranged; the reaction tube is positioned in the tower body, and one end of the reaction tube extends out of the tower body; the flow guide pipe is located in the reaction pipe, and the flow guide pipe and the reaction pipe form a turbulent flow part used for reducing the gas flow rate and discharging reaction gas; the spray head is arranged on the reaction tube, and the spraying end of the spray head is positioned in the reaction tube and corresponds to the turbulent flow part. The reaction pipe and the flow guide pipe are arranged in the tower body, the reaction pipe extends out of the tower body, carbon dioxide gas can be conveniently input, and the flow guide pipe can conduct gas flow guide, so that the carbon dioxide gas can fully react with a barium sulfide solution sprayed by the spray heads on the periphery of the reaction pipe; meanwhile, the flow guide pipe is also used for outputting gas, so that gas output in the tower is realized, and the device is suitable for preparing barium carbonate by taking a barium sulfide solution as a raw material.

The invention belongs to the technical field of preparation processes of barium metaphosphate, and particularly relates to a preparation method of monodisperse micron-sized barium metaphosphate. The preparation method comprises the following steps: mixing purified barium carbonate slurry and phosphoric acid according to a certain molar ratio, reacting to obtain barium dihydrogen phosphate slurry, adding ethanol and a particle size regulating agent, uniformly mixing, and carrying out spray drying to obtain a crude product; the particle size regulating agent comprises ammonium citrate, polyalcohol and barium metaphosphate; and calcining the crude product to obtain the product monodisperse micron-sized barium metaphosphate. According to the preparation method, a small amount of particle size regulating agent and a certain amount of ethanol are added, a crude product with uniform particle size distribution is prepared under a spray drying process condition, and then calcination is performed to obtain the micron-sized barium metaphosphate with uniform particle size distribution.

The invention discloses micron-sized pearl glaze ceramic and a preparation method thereof, and relates to the technical field of ceramic, and the micron-sized pearl glaze ceramic is characterized by comprising a ceramic body, a toning ground coat layer and a dry particle layer, the toning ground coat layer is prepared from the following raw materials in parts by weight: 15 to 25 parts of quartz, 20 to 30 parts of feldspar, 5 to 10 parts of kaolin, 3 to 8 parts of calcined zinc oxide, 5 to 10 parts of calcium carbonate, 8 to 15 parts of barium carbonate, 8 to 15 parts of zirconium silicate, 0.05 to 0.5 part of toning metal oxide and 1 to 3 parts of functional additive; the dry particle layer is prepared from the following raw materials in parts by weight: 30 to 40 parts of quartz sand, 10 to 15 parts of borax, 5 to 8 parts of sodium carbonate, 3 to 6 parts of lithium carbonate, 10 to 18 parts of Bi2O3, 10 to 18 parts of TiO2, 0.5 to 2 parts of rare earth oxide and 0.5 to 2 parts of nucleating agent. The prepared ceramic shows soft and layered pearl luster under light rays of different angles, and the physical performance is greatly improved.

The invention relates to the technical field of dielectric ceramic powder preparation processes, in particular to a multilayer ceramic capacitor, high-activity nano barium titanate powder for the multilayer ceramic capacitor and a preparation method of the high-activity nano barium titanate powder, and the method comprises the following steps: (1) reacting soluble barium salt with a precipitator to obtain barium carbonate precursor particles with high specific surface area; (2) uniformly coating the surfaces of the barium carbonate precursor particles with nano titanium dioxide particles by using a supercritical fluid flash evaporation technology to form a composite precursor; and (3) carrying out solid-phase synthesis reaction on the composite precursor, and sintering to obtain the nano barium titanate powder. Through the synergistic effect of two means of high-activity precursor preparation and nanoscale uniform coating, the composite precursor with extremely high specific surface area, surface energy and microcosmic uniformity is prepared, the thermal sintering temperature is effectively reduced, abnormal growth of crystal grains and lattice distortion are restrained, and the preparation method has the advantages that the preparation process is simple, and the preparation cost is low. The tetragonality of the nano barium titanate powder is obviously improved.

The invention relates to chemical-corrosion-resistant full-polished glaze as well as a preparation method and application thereof, and belongs to the technical field of ceramic production and manufacturing. The chemical-corrosion-resistant fully-polished glaze comprises the following mineral components in percentage by mass: 5%-10% of quartz, 5%-10% of kaolin, 1%-10% of calcined talc, 20%-25% of wollastonite, 10%-20% of calcined kaolin, 1%-5% of calcined alumina, 1%-5% of calcined zinc oxide, 1%-5% of barium carbonate, 1%-3% of titanium oxide, 1%-5% of zirconium silicate and 10%-20% of boron frit. By specially designing a full-polishing glaze formula of the ceramic tile, adjusting the firing temperature and discharging or reducing defects such as air holes in a glaze layer as much as possible, the glaze layer forms a stable inert surface, and chemical substances cannot react with the glaze layer or only slightly react with the glaze layer, so that the transparency, integrity and glossiness of the surface are kept.

The present application relates to the technical field of dielectric ceramic powder preparation, and particularly relates to a multilayer ceramic capacitor, a high-activity nano-barium titanate powder for the multilayer ceramic capacitor and a preparation method of the high-activity nano-barium titanate powder, the method comprising the following steps: (1) reacting a soluble barium salt with a precipitator to obtain barium carbonate precursor particles with high specific surface area; (2) uniformly coating nano-titanium dioxide particles on the surface of the barium carbonate precursor particles by using a supercritical fluid flash technology to form a composite precursor; and (3) performing a solid-phase synthesis reaction on the composite precursor and sintering to obtain nano-barium titanate powder. The present application, through the synergistic effect of the two means of "high-activity precursor preparation" and "nano-level uniform coating", prepares a composite precursor with extremely high specific surface area, surface energy and micro-uniformity, effectively reduces the heat sintering temperature, suppresses abnormal grain growth and lattice distortion, and significantly improves the tetragonality of the nano-barium titanate powder.

The invention belongs to the technical field of preparation of barium titanate, and particularly relates to a preparation method of a defect-regulating barium titanate composite material, which comprises the following preparation steps: S1, adding a proper amount of barium carbonate, titanium dioxide, nickel oxide and dopant mixed powder into a ball milling tank for ball milling to obtain initial barium titanate composite particles; s2, dispersing the initial barium titanate composite particles obtained in the step S1 into an aqueous solution of a growth inhibitor for reaction to form modified barium titanate composite powder; and S3, mixing the barium titanate composite powder obtained in the step S2 with an adhesive polyvinyl butyral, pressing into a biscuit, performing cold isostatic pressing, sintering, annealing in a nitrogen atmosphere, and performing heat preservation to obtain the defect-regulated barium titanate composite material.

The invention provides a method for determining boron element in iron ore, which comprises the following steps: weighing 0.2 g of sample, uniformly mixing with a flux, heating to red at 700-800 DEG C, cooling, adding sodium peroxide for secondary melting, dissolving in water, and transferring to a beaker; adding ethanol to boil, fixing the volume to 500mL, filtering and taking 100mL, adjusting the pH value, adding hydrogen peroxide to slightly boil, cooling, adding barium carbonate to boil, diluting and filtering, and taking 25mL for color development determination. According to the method, sodium carbonate and / or potassium carbonate and sodium peroxide are adopted to form a composite flux, an iron ore sample is completely decomposed through secondary melting and step-by-step dissolution, and the sample decomposition efficiency is improved; the method is stable in recovery rate, is superior to a conventional method in precision, can accurately measure the boron content in the iron ore, meets the technical requirements on boron element detection in the fields of ferrous metallurgy, geological exploration and the like, provides an efficient and reliable detection means for boron content analysis, and ensures the accuracy and reproducibility of a detection result.

The invention discloses a glaze with a shell luster effect, a shell pearlescent glazed tile and a preparation method thereof, and the glaze comprises the following raw material components in parts by weight: 14-24 parts of modified shell frit, 10-15 parts of albite, 9-16 parts of dolomite, 6-10 parts of kaolin, 6-9 parts of zinc oxide, 11-16 parts of strontium carbonate, 6-9 parts of limestone, 2-6 parts of barium carbonate and 15-25 parts of lithium feldspar. The modified shell frit is introduced and matched with other specific raw materials to prepare the glaze capable of presenting shell luster, so that a glass phase and a crystal phase with different refractive indexes are separated out in the firing process of the glaze, a shell-shaped iridescent and soft light effect is simulated, and a glaze surface has wear resistance, skid resistance and antifouling properties and has good physical properties.

The invention relates to the technical field of building ceramics, in particular to waxy antifouling matte glaze and a preparation method and application thereof.The waxy antifouling matte glaze is prepared from, by mass, 7-10 parts of kaolin, 6-15 parts of calcined kaolin, 4-8 parts of quartz, 20-30 parts of potassium feldspar, 5-15 parts of albite, 5-10 parts of wollastonite, 1-5 parts of zinc oxide, 5-10 parts of strontium carbonate, 5-12 parts of barium carbonate and 10-20 parts of crystalline frit; the crystalline frit is prepared from the following raw materials in parts by mass: 25 to 35 parts of kaolin, 3 to 8 parts of calcined aluminum oxide, 20 to 35 parts of calcite, 0.5 to 3 parts of dolomite, 5 to 10 parts of zinc oxide, 25 to 35 parts of potassium feldspar, 0.5 to 3 parts of barium carbonate and 1 to 5 parts of anorthite powder. The waxy antifouling matte glaze provided by the invention not only has antifouling performance, but also has high hardness and high wear resistance on the premise of having matte texture and waxy silky hand feeling, so as to overcome the defects in the prior art.

The invention belongs to the technical field of high-temperature-resistant containers, and provides a quartz crucible preparation method and a quartz crucible. The preparation method of the quartz crucible comprises the following steps: preparing the matrix; the base body is subjected to heating pretreatment; coating the inner wall of the substrate with a barium solution; sintering to form a barium silicate prefabricated layer on the inner wall of the substrate; and barium carbonate powder is scattered on the barium silicate prefabricated layer to form a barium silicate protective layer. According to the quartz crucible prepared by the quartz crucible preparation method provided by the invention, the barium silicate protective layer in the quartz crucible can effectively prevent a product to be prepared from corroding the quartz crucible.

The invention relates to the technical field of architectural ceramics, in particular to golden yellow metal dry granular glaze and a preparation method and application thereof.The preparation method comprises the following steps that A, under the inert atmosphere, copper simple substances, aluminum simple substances, zinc simple substances, tin simple substances, chromium simple substances and terbium simple substances are completely molten, and copper alloy liquid drops are obtained after liquid breaking; cooling the copper alloy liquid drops in a natural environment to obtain copper alloy dry particles; b, uniformly mixing kaolin, quartz, calcite, dolomite, barium carbonate and zinc oxide, calcining, quenching with water, grinding and sieving to obtain a crystalline frit; and C, uniformly mixing the copper alloy dry granules, the crystalline frit and the suspending agent to obtain the golden yellow metal dry granular glaze. The preparation method of the golden yellow metal dry granular glaze is high in operability, and on the premise that the golden yellow metal texture effect is uniform, the golden yellow metal dry granular glaze can have the excellent golden yellow metal texture effect, transparency and antifouling performance at the same time and also has high abrasion resistance and hardness.

The invention relates to the technical field of building ceramics, in particular to hydrophilic self-cleaning glaze, a hydrophilic self-cleaning ceramic tile and a preparation method thereof.The hydrophilic self-cleaning glaze is prepared from, by mass, 6%-18% of albite, 8%-16% of potassium feldspar, 8%-12% of calcite, 7%-11% of calcium hydroxide, 8%-12% of barium carbonate, 20%-34% of quartz, 1%-3% of nanometer silica sol, 8%-12% of kaolin, 4%-8% of aluminum hydroxide and 1%-3% of zinc oxide. According to the hydrophilic self-cleaning glaze provided by the invention, on the premise of reducing the production cost, not only can excellent and lasting hydrophilic self-cleaning performance be realized, but also the antifouling performance and high transparency can be ensured, and the technical problems of poor hydrophilic self-cleaning durability and high production cost in the prior art are solved.

The invention discloses a barium carbonate doped potassium-sodium niobate-based piezoelectric single crystal and a preparation method thereof, the barium carbonate doped potassium-sodium niobate-based piezoelectric single crystal has a chemical general formula of (1-x) (K < 0.498 > Na < 0.498 > Li < 0.004 > Nb < 0.9955 > Bi < 0.004 > Fe < 0.0005 > O < 3 >)-xBaCO3, 0.001 < = x < = 0.009, and x represents a mole fraction. The preparation method comprises the following steps: taking Na2CO3, K2CO3, Nb2O5, Li2CO3, Bi2O3, BaCO3 and Fe2O3 as raw materials, adopting a seedless solid-phase crystal growth method, and carrying out primary refinement ball milling, pre-sintering, secondary refinement ball milling and sintering to prepare the barium carbonate doped potassium sodium niobate based single crystal. According to the method, the collaborative optimization of the piezoelectric property and the temperature stability is realized while the growth of the large-size single crystal is ensured.

The invention discloses a high-hardness glaze as well as a preparation method and application thereof, and belongs to the field of architectural ceramics. The high-hardness glaze comprises the following raw materials in parts by weight: 12-14 parts of medium aluminum frit, 16-18 parts of high aluminum frit, 16-18 parts of potassium feldspar, 18-20 parts of albite, 3-5 parts of wollastonite, 1-3 parts of calcined talc, 5-7 parts of calcined zinc oxide, 4-6 parts of emery powder, 1-3 parts of calcined alumina, 2-4 parts of dolomite, 1-3 parts of barium carbonate, 3-5 parts of calcined kaolin, 5-7 parts of kaolin and 34-36 parts of printing paste. 44-46 parts of stamp-pad ink and 4-6 parts of water; a glaze layer prepared from the high-hardness glaze has high hardness and scratch resistance, is wide in application environment, and has good color development and good wear resistance.

The invention discloses a light domestic ceramic material and a preparation method thereof, and relates to the technical field of ceramic materials. The invention discloses a preparation method of a light domestic ceramic material, which comprises the following steps: preparing raw materials according to the raw material ratio of a green body, crushing, ball-milling, sieving, and aging to obtain green slurry; preparing a green body from the green body slurry, drying the green body, fettling the green body, and biscuiting to obtain a green body; and glazing the surface of the green body, firing and molding, and cooling to obtain the light domestic ceramic material. The green body comprises the following raw materials in parts by weight: 48-60 parts of kaolin, 17-23 parts of potassium feldspar, 20-26 parts of quartz, 1-2 parts of a functional additive, 2-3 parts of talc, 4-8 parts of wollastonite, 6-9 parts of calcium oxide and 15-25 parts of barium carbonate. The functional additive is added into the green body, so that the strength of the green body is effectively improved, and excellent breaking strength is still kept in the thinning process of the green body.

The invention discloses a novel antibacterial environment-friendly ceramic and a preparation method thereof, and belongs to the technical field of ceramics, the method comprises the following steps: dissolving aluminum chloride, barium nitrate and ferric nitrate in a solvent, and stirring and mixing to prepare a first mixed solution; adding kaolin and carbon powder into the first mixed solution, and stirring and mixing to obtain a second mixed solution; boron, carbon, aluminum, boron oxide, zirconium dioxide and barium carbonate are dispersed in a dispersing agent to be mixed to prepare a third mixed solution; boron oxide, aluminum hydroxide, titanium boride, zirconium, silicon, sodium zirconate, sodium carbonate, calcium tungstate and zirconium dioxide are added into the second mixed solution to be stirred and mixed, and mixed slurry is prepared; the mixed slurry is used for preparing a blank body, the blank body is placed in a sintering furnace to be sintered in different temperature stages and sintering environments, and the prepared ceramic has high strength, is not prone to cracks in the environment where the temperature changes rapidly and is good in corrosion resistance.

Systems and methods for additive printing of barium titanate (BaTiO3) components using precursors of barium titanate, i.e., barium carbonate (BaCO3) and titanium dioxide (TiO2), to prevent clogging of nozzles. Solid of barium carbonate and titanium dioxide are prepared by an electrical-assisted breakdown process, such as, e.g., milling, blending, and / or grinding. The assisted breakdown process allows for the reduction of particle size, thorough mixing, and consistent particle distribution of the precursors. In addition, the finer particles possess a much higher sinterability of the precursors while giving rise to denser final products. A planetary ball milling system with zirconia vial and balls at a fixed rotation speed may be used. The precursors are then printed into a green part. A solid-state reaction between barium carbonate and titanium dioxide to form barium titanate is activated by the application of heat, such as, e.g., through a sintering process, which forms the final product.

The invention discloses sanitary ceramic repairing glaze and a ceramic glaze surface defect repairing process. The repairing glaze comprises ground glaze and self-cleaning snowflake cover glaze, the ground glaze is prepared from 18 to 23 parts of frit, 3 to 8 parts of calcined kaolin, 25 to 30 parts of quartz, 23 to 28 parts of albite, 2 to 5 parts of wollastonite, 9 to 14 parts of calcite, 0.8 to 1.2 parts of calcined zinc oxide, 8 to 12 parts of zirconium silicate, 1 to 3 parts of barium carbonate and 0.8 to 1.2 parts of aluminum oxide; the self-cleaning snowflake cover glaze is prepared from 28 to 33 parts of frit, 12 to 16 parts of calcined kaolin, 2 to 6 parts of calcined zinc oxide, 7 to 12 parts of calcite, 3 to 8 parts of wollastonite, 16 to 22 parts of albite, 0.5 to 1.5 parts of calcined talc, 15 to 20 parts of quartz, 1 to 4 parts of barium carbonate and 0.5 to 13 parts of aluminum oxide. According to the formula of the ground glaze and the self-cleaning snowflake cover glaze, the initial melting temperature of the glaze is reduced by adding a fluxing agent and reducing high-temperature raw materials, the high-temperature chemical reaction time is shortened, and the formula can adapt to a fast firing curve of a refiring kiln.

The invention provides a light-transmitting brick based on a low-temperature light burning process and a preparation method thereof, and the method comprises the following steps: according to a formula of a ceramic body, mixing Danshan sand, high-whiteness water mill tailings, lime particles, high alumina and barium carbonate, adding water, and carrying out ball milling to obtain barren slurry; carrying out spray granulation on the barren slurry to obtain barren powder, and calcining the barren powder in a preset low-temperature range to obtain a semi-finished product of a light calcined material; grinding the light calcined material semi-finished product to obtain light calcined material powder; mixing rubbed stone mud and ultra-white mud according to a formula of a ceramic green body, then performing slurrying to obtain slurry, mixing the light calcined material powder with the slurry, and then performing ball milling to obtain green body slurry; granulating the green body slurry to obtain green body powder, and treating the green body powder to obtain the light-transmitting brick. According to the invention, the light transmission performance, the firing yield and the product strength of the green body are improved, and the deformation rate during later high-temperature firing is reduced.

Provided is a method for synthesis of carbon-14 radioisotope-labeled flonicamid. Carbon-14 radioisotope is labeled on a pyridine ring in a flonicamid molecule. Carbon-14-labeled barium carbonate is adopted as a radioisotope raw material and then subjected to a reaction with concentrated sulfuric acid to release carbon-14-labeled carbon dioxide, and the carbon-14-labeled carbon dioxide is then subjected to reactions such as reduction, formylation, dehydration, substitution, cyclization, and amide condensation to synthesize a target product.

The invention discloses a colorless medium borosilicate medicinal glass tube and a preparation method thereof, and belongs to the technical field of glass products. The medicinal glass tube comprises the following raw materials in parts by weight: 550-650 parts of quartz sand, 60-70 parts of aluminum hydroxide, 100-250 parts of borax pentahydrate, 5-15 parts of sodium nitrate, 15-30 parts of sodium carbonate, 1-5 parts of sodium fluosilicate, 10-15 parts of calcite, 5-10 parts of barium carbonate, 5-10 parts of potassium carbonate, 10-20 parts of a compound clarifying agent and 400-500 parts of medium borosilicate glass slag. The quartz sand and the borax pentahydrate in a high proportion provide a basis for the high borosilicate glass, the chemical stability of the glass is remarkably improved, the glass can resist acid and alkali erosion and is very suitable for storing various medicines, and in addition, substances such as aluminum hydroxide, calcite, sodium nitrate, sodium carbonate and sodium fluosilicate are added, so that the thermal stability and the mechanical property of a glass product are improved.

The application discloses a cast iron enamel high-temperature matte glaze without fluorinated salt and nitrate, and a preparation method and application thereof, and belongs to the technical field of enamel. The matte glaze is prepared from quartz, borax pentahydrate, titanium dioxide, sodium carbonate, calcium carbonate, barium carbonate, aluminum oxide, sodium tripolyphosphate, potassium carbonate and lithium carbonate according to specific mass proportions. The preparation comprises raw material mixing, smelting at 1300+ / -10 DEG C under a pure oxygen environment, and rapid cooling after wire drawing detection of the smelting state. The matte glaze completely avoids the use of fluorinated salt and nitrate, eliminates the problems of fluoride emission and environmental protection equipment blockage from the source, and the fluorine content of the product is not detected through detection, thereby meeting the limit value requirements of the EU REACH regulation. Meanwhile, the matte glaze has good enamel surface, excellent firing performance and matte performance, is suitable for a cast iron substrate, has a firing temperature of 780-800 DEG C, and can be used for the production of green and environmentally-friendly enamel products.

The invention relates to a dielectric ceramic substrate, in particular to a dielectric ceramic substrate and a preparation method thereof. The dielectric ceramic substrate comprises aluminum oxide and an auxiliary agent, and the auxiliary agent comprises one or more of silicon oxide, magnesium carbonate, calcium carbonate, yttrium oxide, boron nitride, titanium dioxide and barium carbonate. The dielectric ceramic substrate provided by the invention is high in density, good in flatness and high in precision.

This invention discloses a black-based blue-spotted glaze with an earthworm-like pattern and its preparation method. The glaze consists of a body, a black base glaze, and a blue-spotted glaze from the inside out. The raw materials for the black base glaze are: feldspar, calcite, calcium borate, dolomite, talc, barium carbonate, quartz, bentonite, zirconium silicate, rutile, cobalt oxide, manganese oxide, and iron oxide. The raw materials for the blue-spotted glaze are: feldspar, limestone, alumina, talc, barium sulfate, Datong clay, zinc oxide, quartz, and titanium dioxide. The preparation method includes: 1. Wet ball milling the black base glaze raw materials to obtain a black base glaze slurry; 2. Wet ball milling the blue-spotted glaze raw materials to obtain a blue-spotted glaze slurry; 3. Bisque firing the body; 4. Applying the black base glaze slurry to the body and drying it; 5. Applying the blue-spotted glaze slurry to the body and drying it; 6. Oxidation firing and reduction firing of the body, followed by natural cooling to obtain the black-based blue-spotted glaze. The raw material formula of this invention is reasonable and environmentally friendly, which can improve the mechanical properties of the glaze; the preparation method is simple and the yield is high.

The invention relates to the field of architectural ceramics, and discloses light-transmitting powder, a gradually-changed light-transmitting ceramic tile and a preparation method of the gradually-changed light-transmitting ceramic tile. The light-transmitting powder comprises the following raw materials in parts by weight: 50-70 parts of nepheline syenite, 10-15 parts of superfine quartz, 10-20 parts of kaolin, 3-8 parts of barium carbonate, 5-10 parts of wollastonite, 3-5 parts of yttrium aluminum garnet and 2-4 parts of magnesium aluminate spinel. By adopting the formula, the light-transmitting green body which is high in light transmittance, stable in light transmittance and uniform in light transmittance can be prepared by compounding multiple components, and a good foundation is provided for preparing a ceramic tile with full-transparent jade texture.