Study And Prepairing Of Glisten Glaze

Glisten glaze, developed in recent years, is a kind of ornamental artistic glaze. It can be used to print all kinds of the design and color patterns on tiles with specular reflection when sintered, which may cater to some customers' appetite. In this paper, the formula and producing process of the glisten glaze are discussed systematically, as well as the crystallization of CeO2 in the glisten glaze and the glistening mechanism.Four formulas and their corresponding technical processing are determined by large numbers of formula experiments. The test of all kinds of factors shows that the sintering temperature affects the size and quantity of the grain of CeO2 crystallized from the glaze melt so as to influence the glistening effect dramatically; the glisten glaze should be cooled quickly after sintering ; the glisten glaze can be successfully melted in a certain temperature range, but the melting temperature can affect the sintering temperature to some extend. Generally, the sintering temperature will rise with the falling of the melting temperature. The clinker of the glisten glaze is grinded for an hour with such a proportion ?powder:ball:water = 1:3:5. The extreme grinding will accelerate the reaction between the glisten glaze and the based glaze, which is not good for sintering. While grinding, a small quantity of CMC and ethylene glycol are added to improve the grinding efficiency and the glistening effect of glaze surface. The finable thickness of glaze layer is 0.3-0.4mm.Testing and analyzing the crystallization process of CeO2 when the glisten glaze powders from foreign countries were sintered, we find that the crystal nucleus of CeO2 in the glaze form in 950-1040℃, and the maxical velocity of nucleation is near 1010℃. 1040-1100 ℃ is located in the temperature range of the growing of CeO2 crystal and the temperature of the maxical growing velocity is nearly between 1070℃ and 1100℃.The analysis of the glistening mechanism shows that the reflection of crystal grain of CeO2 and the specular reflection of glaze surface directly affect the glazing effect. The refractive index of glaze layer, the smoothness of glaze surface, the orientation, size and covering area in the glaze of CeO2 are the important factors influencing the glistening effect We may begin with these factors to improve the technology.