The performance of bone china

1. Mechanical strength: Although bone china belongs to the category of soft porcelain, its mechanical strength is not low. Among traditional chinaware ceramic, it belongs to high-strength porcelain tableware. Its bending strength is 120-160MPa, which is 80- 120MPa is 30%-50% higher. 2. Thermal stability: Because of its long columnar main crystal phase, bone china has a high expansion coefficient and large anisotropy, the thermal stability of traditional bone china is poor, generally around 160°C ( That is, the heat exchange from 160-20℃ in water does not burst once). Although some experts use methods such as zirconia toughening to improve the thermal stability of bone china, the current products on the domestic market do not apply this technology well, and most products have poor thermal stability. 3. Glaze hardness: Bone porcelain white porcelin dinnerware uses frit glaze, which is glaze fired at a lower temperature (1050-1150°C), so the glaze hardness is lower than that of ordinary chinaware ceramic, and the hardness is generally 550-600MPa. Generally, the hardness of the glaze surface can be improved by adding porcelain powder, zircon powder, etc.

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