Laboratory Porcelain Ware
To prevent thermal stress cracks on porcelain ware, We strongly recommend heating/cooling rate not to exceed 200° C/ hour. The thermal shock resistance of laboratory porcelain depends on various factors such as the correct correlation of the coefficient of expansion of porcelain body and glaze, the elasticity of glaze, etc. One of the important components of porcelain is quartz. In the final porcelain structure, however, there should be no free quartz on account of its high thermal expansion rate and phase changes which greatly weaken the porcelain body when subjected to changes of temperature.