Intrinsic properties of bone china cups 1: mechanical strength Although bone china cups belong to the category of soft porcelain, their mechanical strength is not low. It is a relatively high-strength porcelain in traditional ceramics, and its bending strength is 120-160MPa, which is higher than Generally, the 80-120MPa of traditional ceramics is 30%-50% higher.
Intrinsic properties of bone china cup 2: thermal stability. Because of its main crystal phase is long columnar, has a high expansion coefficient and large anisotropy, the thermal stability of traditional bone china is poor. At about 160°C (that is, heat exchange from 160-20°C water once without bursting). Although some experts use methods such as zirconia toughening to improve the thermal stability of bone china, but the products on the domestic market do not apply this technology very well, and most of the products have poor thermal stability.
Intrinsic properties of bone china cups three: Glaze surface hardness Bone china uses fritted glaze, which is glazed and fired at a lower temperature (1050-1150°C), so the glaze surface hardness is lower than ordinary ceramics, and the hardness is generally 550-600MPa. . Generally, the hardness of the glaze surface can be improved by adding porcelain powder, zircon powder, etc.