Bone china manufacturers: What are the differences between magnesia porcelain and bone china?

Bone china manufacturers: What are the differences between magnesia porcelain and bone china? Bone china is abbreviated as bone china (BONECHINA), and its scientific name is bone ash china. It is made of animal bone charcoal, clay, feldspar and quartz as basic raw materials, and fired twice after high-temperature biscuit firing and low-temperature glaze firing. According to the bone china standards set by the United Kingdom, it contains 30% of the tricalcium phosphate from animal bones, and the finished product has light transmittance, so it can be called bone china. The American standard is at least 25%. Magnesia porcelain refers to a ceramic material with MgO-containing aluminosilicate as the main crystal phase. Magnesia porcelain can be divided into original enstatite porcelain (SteatiteCeramic), forsterite porcelain white porcelin dinnerware, spinel porcelain, and cordierite porcelain according to different main crystal phases. These types of porcelain white porcelin dinnerware belong to the MgO-Al2O3-SiO2 ternary system. Their basic properties are as follows: Talc porcelain MgO-SiO2 orthorhombic 3.10 high strength, low dielectric loss, low thermal stability Forsterite porcelain 2MgO-SiO2 orthorhombic 3.26 dielectric loss, high expansion coefficient spinel porcelain MgO-Al2O3 Cubic 3.60 has small dielectric loss, low expansion coefficient and high hardness. Cordierite porcelain 2MgO-2Al2O3-5SiO2 orthorhombic 2.60 has poor electrical performance, low expansion coefficient and good thermal stability. Talc porcelain is generally used in FM wireless equipment such as radars and televisions. , And insulating parts, etc. Forsterite has low dielectric loss and large specific volume resistance, and can be used as a high-frequency insulating material. Cordierite has a very low expansion coefficient and is used for insulating materials or electric heating materials that require the volume not to change with temperature, but its electrical properties are poor. Spinel is generally used in refractory materials.
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