Bone porcelain glaze 09

The principle of bone China made beautiful sex bone China ( Bone China) As fine porcelain for daily use, the beautiful appearance is to make it as the elements of bone China products, as a result, the bone porcelain glaze must have beautiful appearance. This requires the bone porcelain glaze glossiness, lightness and transparency to achieve a better state. Configuration bone porcelain glaze, the bone porcelain of raw material selection, melt temperature, melt and the properties of glaze performance indicators such as the overall consideration to. Principle of adaptive bone porcelain glaze to adapt to the body, must have match the bone porcelain body expansion coefficient, good elasticity and proper ph value. Glaze the expansion coefficient of less than the coefficient of expansion of the body, which, when cooling form the compressive stress, improve the strength of the product. “ Is glaze & throughout; Can improve the tensile strength and thermal stability of bone China products, to facilitate bone porcelain glaze combination, consequently the expansion coefficient of the glaze should close to characterize and slightly below, both differ degree depends on the types and properties of bone porcelain body. According to the performance of the bone porcelain body regulating glaze melting performance. Bone porcelain glaze melting performance including in order to make the glaze can very good spread on billet, general requirements of glaze temperature is close to the sintering temperature of the billets and mature a little low. In addition, consider matching corresponds to the bone porcelain body bone porcelain glaze as request acidic ph billet with alkaline glaze; Alkaline billet with acidic glaze. Bone porcelain glaze billet combining with the condition of the glaze elasticity and tensile strength are also very concerned. Requires both glaze have higher tensile strength, and require it to match the billet elastic modulus. Practical principles of bone China ( Bone China) Both art and commodity, require bone porcelain glaze has good hardness and abrasion resistance. Production, must have very good stability, to avoid the formation of bubble glaze pinhole defects, such as bone porcelain glaze should have high beginning melt temperature and not less than 30 ℃ melting temperature range. Health principle bone China health including production of the shaft and health products. Production health refers to the raw materials used in production as far as possible no poison to human body, the production process to minimize such as poison of emissions, such as the use of heavy metals such as lead, cadmium and emissions. Health is a finger bone porcelain products such as lead-free cadmium dissolution of heavy metals. Therefore, during the preparation of the bone porcelain glaze minimize contain elements such as lead, cadmium, barium, zinc raw material use. Calculation from the chemical composition of bone porcelain glaze glaze type if the known chemical composition, can be calculated by the following steps glaze type: (1) to convert the reduction amount contains chemical composition for excluding reduction amount of chemical composition; Oxide material of components (2) to calculate the amount of n, n = mass fraction of oxygen content/molecular weight; Bone China (3) with R2O and RO the sum of amount of substance, respectively, in addition to the amount of substance of each oxide. Bone China (4) according to the above results will alkaline oxides, neutral oxide and acidic oxides order for a quick glaze type. Known a bone porcelain glaze chemical composition, try to calculate its glaze type. Bone China solution: (1) includes the reduction of chemical conversion into do not contain chemical composition, reducing total use ( 99. 97%) Minus the reduction ( 2. 12%) The income difference ( 97. 85%) As the divisor, in addition to the percentage of the oxide respectively, do not contain the quality of the calcination reduction percentage composition. Bone China (2) to calculate the number of moles of each oxide. (3) to calculate the sum of alkaline oxide. ∑ ( R2O+RO) = 0. 1567 + 0. 0012 + 0. 0412 + 0. 0705 + 0. 0666 + 0. 0273 + 0. 0089 + 0. 0007 = 0. The amount of calculating the relative material, 3730 (4). To the sum of the amount of alkaline oxide material is 1, calculate the oxide on the material, formula for. Bone China SiO2 = 0. 9398/0. 3730 = 2. 5195, other components similar calculation. — Bone China hotel tableware to be continued. 。 。 。 。 。