33results about How to "Glaze surface hardness is high" patented technology

The invention relates to polycrystal intensified ceramic manufacturing technology that belongs to ceramic manufacturing technology field. It adopts common kaolin as main raw material. The main constituents of the ingot is 52-60% SiO2, 15-22% Al2O3, 15-21% MgO, 0.5-2% ZnO, 3-5% ZrO2, 0.5-3% BaO, and the other 1-3%. 3-5% Al2O3 crystal whisker and 1-2% ZrO crystal whisker are induced into the ingot, and 5-10% nm SiO2 and 1-2% ZnO are induced into glaze material. After the process of modifying the raw material, mixing and grinding, filtering to remove iron, filtering mire, drilling mire, banalitying, molding, drying, glazing, drying, sintering, checking and packaging, the common kaolin is modified to have 43-52% SiO2, 32-38% Al2O3. The invention could produce high level ceramic.

The invention discloses a high-permeability high-whiteness high-strength eggshell porcelain plate which is characterized by comprising the following natural ore raw materials and industrial chemical raw materials in percentage by weight: 30-35% of Longyan kaolin, 10-12% of quartz, 5-8% of aluminum oxide, 30-35% of feldspar, 4-6% of talc, 1%b of calcite, 2-5% of potassium feldspar, 1-2% of albite,8% of bone meal and 3-5% of yttrium oxide, and a product of the eggshell porcelain plate is prepared through procedures of washing, blending, ball milling, addition of 4% of external porcelain powder,deironing, filtration, slurry treatment, molding, primary drying, blank trimming, biscuiting, refining, glazing, secondary drying and glaze firing. By controlling formula and molding processors, theproblems of whiteness, transparency, glaze surface hardness and flatness of the product can be solved, and the obtained high-permeability high-whiteness high-strength eggshell porcelain plate productcan be used as decorative lamp shades in families, offices, indoor places and the like, and has wide application prospects.

A method for preparing a carbon-golden metallic luster crystalline glaze. The source and composition of the glaze are (parts by mass): 25-30 parts of MnO2 are used as crystallization agents, 0.5-1.5 parts of MoO2 and 0.5-1.5 parts of V2O5 are used as crystals Accelerator, 2-4.5 parts of CuO, 2.5-5 parts of Fe2O3, 3-7 parts of ZnO and 0.5-2.5 parts of NiO and various metal oxides are used as colorants, and other ingredients are 30-38 parts of Pingjiang Potassium Feldspar, 5-12 parts of quartz produced in Fengyang, 5-10 parts of talc powder produced in Wuxi and 5-12 parts of boron frit produced in Yixing. After the glaze slurry is prepared and applied to the biscuit body, the temperature curve of the present invention is used for glaze firing. With a charcoal gold metallic luster and iridescent effect and crystal beauty. In addition, it has low cost, high glaze hardness, good wear resistance and corrosion resistance. It is a brand-new ceramic art glaze and can be used to decorate ceramic handicrafts.

The invention relates to a method for firing a domestic porcelain, in particular to the method for firing high-grade domestic porcelains, such as bowels and cups. The method comprises the following steps of: 1, drying a finished body, placing the body into a kiln to perform biscuit firing at the low temperature of 800 to 900 DEG C, and polishing the biscuit-fired body to smooth; 2, glazing the biscuit-fired body and removing glaze at the mouth rim and foot of the product; 3, directly placing the product on a refractory slab in a reversing way for primary high-temperature glaze firing; and 4, turning the product over, cleaning and partially glazing the mouth rim of the product, placing the product into the kiln again in an erecting way for secondary high-temperature glaze firing, and cooling the product to obtain the finished product. Compared with the conventional low-temperature biscuit-firing high-temperature glaze-firing method or high-temperature biscuit-firing low-temperature glaze-firing method, the method is convenient to operate, ensures the light weight and high superior quality rate of the fired finished product, and is very applied to the production of various high-grade domestic porcelain products, such as the bowels and the cups.