83results about How to "Wide firing temperature range" patented technology

The invention relates to a leadless environmentally-friendly glass glaze. The leadless environmentally-friendly glass glaze comprises base glaze, and the base glaze comprises 25-60wt% of SiO2, 5-30wt% of ZnO, 1-8wt% of CaO + MgO, 0-10wt% of BaO, 0-10wt% of SrO, 5-33wt% of B2O3, 0.5-11wt% of Al2O3, 0.5-10wt% of TiO2, 0-10wt% of ZrO2, 1-22wt% of K2O +Na2O and 1-10wt% of Li2O. The environmentally-friendly glass glaze contains no lead, can avoid damages to human bodies and the environment, can substitute traditional lead-containing glazes, has a lower price than leadless bismuth-containing glazes, is suitable for common flat glass, and can be toughened or sintered.

Provided is a method for preparing iron tailing into ceramic frit glaze. The method for preparing iron tailing into ceramic frit glaze regards iron tailing as raw materials, is free of adding other ceramic pigment or, colorant except for iron, and prepares ceramic frit glaze which is abundant in color and good in effect. The method for preparing iron tailing into ceramic frit glaze explores a novel path for iron tailing resources with high technology and high added value. The dosage of the iron tailing in the ceramic frit glaze is large, and the iron tailing is in integral utilization. The method for preparing iron tailing into ceramic frit glaze utilizes affluent iron and other microelements in the iron tailing to tint for glaze, replaces the expensive ceramic pigments, greatly lowers the cost of the ceramic frit glaze, selects and provides novel direction for ceramic frit glaze raw materials and the ceramic pigments, and lowers the dependent degree to high quality non-metal mineral resources compared with the current ceramic glaze production. The iron tailing and parts of the raw materials are initially melted to frits to use, so that firing temperature range of the glaze is expanded, and ceramic glaze surface quality is improved. A series of unfavorable influences to the preparation process in the process of applying the iron tailing in a ceramic green body are overcome. The method for preparing iron tailing into ceramic frit glaze has the advantages of being simple in process, optimum in glaze quality, and applicable to industrialized mass production.

The invention discloses a frit used for producing Longquan celadon, a Longquan celadon frit glaze and a production method of the frit glaze. Raw materials of the frit comprise, by weight, 45-95% of rare earth tailings, 1-30% of Longquan porcelain clay, 1-25% of alumina powder, 1-15% of kaolin, 1-30% of yellow glaze soil, 0-25% of potash feldspar, 0-20% of quartz and 0-10% of talcum. The rare earth tailings are adopted as a main raw material of the frit, so the recycling of the rare earth tailings is realized, and the use amounts of other routine Longquan celadon raw materials are greatly reduced; and trace rare earth elements in the rare earth tailings have an obvious color development promoting effect on the celadon glaze, so extra addition of a coloring agent or a ceramic coloring chemical engineering raw material to the glaze is prevented, thereby the manufacturing cost of the Longquan celadon frit glaze is reduced, the color appearance of the glaze is stable, and industrial large-scale production is facilitated.

The invention relates to the technical field of preparation of ceramic glazed bricks, and provides a wear-resistant antifouling ceramic starlight glazed brick and a preparation method thereof. The glittering effect is achieved through multiple reflection, dispersion and refraction methods of crystals in the glaze, a glaze layer of the glazed brick has the multi-layer glittering effect and the three-dimensional decoration effect, and the grade and decoration of the product are improved; and an excellent flashing effect can be achieved only by polishing according to a conventional polishing process of a glazed product. The glazed brick disclosed by the invention has relatively high hardness and excellent antifouling property and wear resistance.

The present invention relates to a mineral bone powder, crystal bone china and a production method of the crystal bone china. The mineral bone powder is synthesized by mineral apatite and dolomite. A crystal bone china green body consists of ingredients in weight percent as follows: 39-46% of mineral bone powder, 25-32% of crystal, 9-15% of potassium feldspar, 12-18% of synthetic clay, 1-5% of nano-activated clay, and 2-6% of spodumene. The production method of the crystal bone china includes the steps of ingredient mixing, molding, biscuiting, glazing and glaze firing; the crystal needs calcination acid treatment; and the product is formed by biscuiting and glaze firing. For the crystal bone china, by reasonable ingredient mixing, mineral bone powder and crystal are adopted as main materials for producing high-grade china, the firing temperature range is wide, the firing control is easy, and the crystal bone china integrates the characteristics of high white degree, good semi-transparency, high mechanical strength and good thermal stability; and the scientific and rational production method which is easy to implement effectively ensures the quality and the qualified rate of the product and is conducive to industrial production.

The invention discloses a method for preparing superfine spherical silver powder for barium-titanate-based semiconductor ceramic ohmic electrode slurry, which comprises the following steps of: preparing silver nitrate solution, adding a polymer dispersant with high-speed stirring, and regulating the pH value of the silver nitrate solution to be between 8 and 12; and adding another polymer dispersant, a reducing agent and an antifoaming agent in turn, washing by using deionized water, and drying to obtain a finished product. By skillfully utilizing the change of high and low stirring rotating speeds and adding stirring heat preservation, superfine silver powder particle aggregate with an organic surface is formed, and the settling speed of the silver powder is greatly increased; an organicreagent with a dispersion function, and a polymer surfactant are selected as the antifoaming agent, so that the dispersion function and an antifoaming function are enhanced simultaneously; suitable polymer dispersants, reducing agent, antifoaming agent and alcohol are selected, so that the superfine silver powder with high purity and complete sphericity is prepared, and the barium-titanate-based semiconductor ceramic ohmic electrode slurry prepared from the superfine silver powder has high adhesion and ohmic contact performance and a wide firing temperature range; and the preparation method is nontoxic, low in cost and environment-friendly.

The invention relates to the technical field of sanitary ceramics, in particular to matte glaze for sanitary ceramics and a preparation method of the sanitary ceramics. The ceramic tile is prepared from the following raw materials in parts by weight: 12-15 parts of potassium feldspar, 15-18 parts of quartz powder, 15-25 parts of waste porcelain powder, 14-20 parts of burnt talcum powder, 12-16 parts of wollastonite powder, 8-10 parts of Hunan kaolin, 8-15 parts of high-aluminum stone powder, 0.1-2 parts of calcined zinc oxide and 2-5 parts of dolomite. The silica-alumina ratio of the matte glaze for the sanitary ceramics is 4.8-6.2. The matt glaze for the sanitary ceramics can show a silky and glossy matt effect and has the characteristics of fineness, stain resistance, wide firing temperature range and good glaze heat stability, the preparation method of the sanitary ceramics using the matt glaze for the sanitary ceramics is simple in preparation process, the glaze surface of the product is smooth, flat and free of fine pores, and the glaze surface is smooth and smooth. The problems that bubbles and pinholes are prone to occurring on an existing sanitary ceramic glaze surface, and the flatness of the glaze surface is poor are solved.

The invention discloses low expansion mat glaze and a cordierite barbecue plate coated with the glaze. The glaze comprises bottom glaze and surface glaze, wherein the bottom glaze is made from spodumene, quartz, dolomite, talc, lithium carbonate, kaolin and barium carbonate, and the surface glaze is made from spodumene, quartz, dolomite, kaolin and zinc oxide. The preparation method of the cordierite barbecue plate coated with the glaze comprises the following steps: uniformly mixing a bottom glaze raw material and adding an adhesive, a dispergator and water, and ball-milling to obtain bottom glaze slurry; uniformly mixing the surface glaze raw material and adding an adhesive, a dispergator and water, and ball-milling to obtain surface glaze slurry; spraying the bottom glaze slurry to the surface of the cordierite barbecue plate, and then applying the surface glaze slurry to the plate; and firing for 40-60 minutes at 1200-1260 DEG C and cooling. The glaze layer formed by the glaze is good in thermal shock resistance, high in compactness and fine and smooth and can be used for effectively preventing harmful matters from internally permeating.

The invention discloses Portland cement clinker and a preparation method thereof, and belongs to the field of building material preparation. The Portland cement clinker comprises the following components by weight percentage: 52%-58% of limestone, 23%-26% of coal gangue, 8%-12% of iron tailings, 5%-10% of fly ash, 1.2%-1.8% of fluorgypsum and 0.8%-1.2% of calcium fluoride. Limestone is used as a calcareous raw material, coal gangue is used as a silicon-aluminum raw material, iron tailings and fly ash are used as correction materials, fluorgypsum and calcium chloride are used as a mineralizer,a large amount of solid waste can be consumed to produce the Portland cement clinker, and the mineralizer is introduced at the same time to improve the burnability of raw materials and improve the quality and yield of the clinker. According to the method, waste can be turned into wealth, accumulation of a large amount of solid waste is effectively reduced, the raw material supply problem is relieved, and meanwhile the cost is saved.

The invention relates to porcelain glaze and a glazing method of porcelain at normal temperature. The porcelain glaze comprises the following components in percentage by weight: 45%-55% of potassium feldspar, 3%-10% of MgO, 35%-40% of SiO2 and 5%-12% of Suzhou clay. The glazing method comprises the following steps of: weighing raw materials, and then carrying out ball-milling to obtain glaze slurry; deironing and filtering the glaze slurry to obtain glaze slurry; carrying out glaze spraying on the porcelain at the pressure of 0.06-0.08 MPa, wherein the thickens of a glaze layer is 0.15-0.20 mm; sintering the glazed surface of the porcelain subjected to the glaze spraying at a temperature of 1350-1400 DEG C; and keeping the temperature for 2-2.5 hours. The porcelain glaze disclosed by the invention is not precipitated after prepared into the glaze slurry and has strong adhesive force; according to the glaze disclosed by the invention, the porcelain can be glazed without being heated, the range of sintering temperature is wide, and the sintered glazed surface has uniform vitrification and good glossiness, and therefore, the mechanical strength and the heat stability of the porcelain are enhanced and the product quality is obviously improved.

The present invention relates to a enamel glass ground glaze with wide sintering amplitude and low-temperature adherence strength, which comprises A hardened materials, B medium materials, C soft materials, mill additions and water; calculated according to the weight percentage, the C soft materials are mainly composed of the following raw materials such as 34.19 to 36.79 percent of SiO₂, 3.5 to 4.0 percent of Al₂O₃, 20.00 to 21.0 percent of B₂O₃, 4.00 to 15.00 percent of Na₂O, 3.00 to 4.00 percent of K₂O, 2.5 to 3.0 percent of CaF₂, 5.5 to 6.5 percent of MnO₂, 1.8 to 2.2 percent of Fe₂O₃, 1.8 to 2.2 percent of CuO, 1.70 to 1.90 percent of CoO, 4.5 to 5.5 percent of Li₂O and 1.8 to 2.2 percent of TiO₂; calculated according to the mill addition mixture ratio, the A hardened materials take 35 to 45 percent, the B medium materials take 25 to 35 percent, the C soft materials take 25 to 35 percent, the clays take 5.5 to 6.5 percent, the Alpha-Al₂O₃ takes 2.8 to 5.0, the zircon powders ZrO₂ take 4.0 to 7.5 percent, the nepheline powders take 2.8 to 5.2 percent, the sintering quartz powders take 4 to 8 percent, the borax decathydrates take 0.8 to 1.2 percent, the magnesium oxides take 1.8 to 2.2 percent and the distilled water takes 65 to 75 percent. The present invention can strengthen the low-temperature adherence strength of the ground glaze and increase the sintering amplitude.

The invention relates to low-temperature bright red ceramic glaze and a preparation method thereof. The glaze comprises the main components of, by weight, 50-60 parts of PbO, 15-30 parts of SiO2, 10-20 parts of B2O3, 1-5 parts of Na2O, 1-5 parts of ZnO, 0.5-1.5 parts of CaO and 5-6 parts of inclusion red; the binder comprises red lead powder, quartz powder, sodium borate, boracic acid, calcium carbonate, zinc oxide and sodium silicate, the inclusion red is taken as a coloring agent, and the non-frit low-temperature bright red ceramic glaze is prepared. The glaze overcomes the defects that the preparation technology of frit glaze is complex, the melting temperature is high, the appearance and the performance of the glaze are unstable, and the glaze have to be fired in a reducing atmosphere. The low-temperature bright red ceramic glaze has the advantages that the color tone is pure, the glaze face is smooth and level, the glossiness is high, the glazing method is simple, and the sintering temperature range is wide. The glaze is ideal glaze for firing high-quality ceramic products.

The invention belongs to the technical field of ceramic glaze, and relates to metal glaze as well as a preparation method and an application method thereof. The metal glaze comprises the following raw materials in percentage by weight: 30-37% of albite, 8-15% of quartz, 0-4% of wollastonite, 9-16% of calcined kaolin, 4-6% of calcined zinc oxide, 19-23% of calcined iron phosphate and 13-20% of self-made high-phosphorus frit powder. On the basis of calcined iron phosphate, self-made high-phosphorus frit powder is added as a crystallization accelerant into the metal glaze, so that the metal luster is more easily presented. The element P is introduced into the self-made high-phosphorus frit powder in a frit form, and compared with a high-phosphorus raw material system, the self-made high-phosphorus frit powder has a wider firing temperature range, and the metal effect is more stably presented. By finely adjusting the ratio of the self-made high-phosphorus frit powder to the silicon-aluminum of the metal glaze, the adjustment of metal to different colors can be realized. In addition, the metal glaze is combined with a roller printing process, so that the glaze surface can present a good three-dimensional effect.

The invention belongs to the technical field of domestic ceramics, and particularly relates to thick white glaze ceramics and a preparation method thereof. The thick white glaze ceramics comprise thefollowing materials: crystal frit, potassium feldspar, Longyan kaolin, zinc oxide, Guangfeng calcined talc, strontium carbonate and titanium dioxide. The process method is adopted, through the fact that raw material selecting, formulation optimizing and preparation technique controlling are conducted, a glaze of the prepared ceramic glaze is thick, glossiness is high, and the thickness can reach 2-3mm. Under oxidation flame, the burned glaze is white and yellowish with lard white colors, the glaze is crystal clear with oil but not greasy, and particularly noble, glaze materials are applied tohigh white green bodies, the effect is especially obvious, the ratio of fishing products is high, and the glaze materials are suitable for promotion and application of the domestic ceramics and display ceramics.

The invention discloses a preparation method of heat-preservation foam glass, and relates to the technical field of glass processing. The heat-preservation foam glass is prepared from quartz glass, nanometer zeolite powder coated with bismuth oxide, potassium chloride, sodium carbonate, calcium oxide, aluminium oxide, zinc oxide, acidized bentonite and a foaming agent. By adopting the nanometer zeolite powder coated with bismuth oxide, the foaming temperature and crystallization tendency within the foaming temperature range can be reduced effectively, the synergistic effect of the nanometer zeolite powder and the acidized bentonite can be achieved, the viscosity change rate of the glass within the foaming temperature range can be substantially decreased, and therefore the firing temperature range is widened; the prepared foam glass has an even and stable foam diameter, and the heat preservation performance of the foam glass can be effectively improved.

The invention belongs to the technical field of ceramic materials, and provides a novel iron-manganese heat resistant cooker and a production technology thereof. A low expansion coefficient raw material such as spodumene is not required in the formula of the product; the heat conductivity coefficient of the ceramic ware is greatly improved by improving the heat conductivity coefficient and the thermal shock resistance of ceramic; the sintering temperature is low, and the maturing temperature is wide in range and is 1,160 to 1,230 DEG C; the product is high in superior quality, can be quickly sintered, can tolerate the heat exchange of 500 to 20 DEG C without cracking, has the advantages of low energy consumption, high heat conductivity, high impact strength, thermal shock resistance and the like, and can be used for directly steaming, boiling, stewing and stir-frying food over a heat source; and the cooker keeps the cooking flavor of the conventional ceramic ware, does not decompose nutritional components in the food, and is an ideal multifunctional cooking ware for modern families, hotels and restaurants.