Recently, foreign companies successfully developed a low-temperature sintering ceramics with a blank. It is said that such a blank may be at 900 ¡æ of low temperature porcelain. The outcome of this development has been patented.

Ceramics are usually kaolin, clay, feldspar, such as raw materials, higher than 1000 ¡æ in the high temperature sintering of ceramics. And developed such a low temperature ceramic firing blanks from high-grade kaolin is 62 to 82% (to burn after the water content of the state), the average particle size of calcium carbonate in the following 1.5/um (CaO content after ignition in dollars) 18 ~ 38% and borosilicate glass powder 1 ~ 30% for base material, according to the need for paint, organic additives and the match.

This billet molding, can be at 900 ¡æ under low-temperature sintering of ceramics, even if the temperature to 1200 ¡æ high temperature deformation and will not soften, firing a very wide temperature range, after firing glazing, firing the second. Study shows that: in the firing process, the kaolin and calcium carbonate product of thermal decomposition and decomposition of solid solution between the at the same time. At 800 ¡ã ~ 900 ¡æ temperature range, precipitation of silicate crystallization before the formation of solid solution basically finished, but at that stage is a product containing the appropriate amount of the amorphous CaO-shaped collection of fine products to a very the maintenance of high viscosity into shape, while maintaining low-temperature sintering, and at 875 ¡ã ~ 950 ¡æ under the formation of dense structure.

In addition, in the firing stage, borosilicate glass as a result of the existence of grains, to further reduce the density of the sintering temperature, sintered at 900 ¡æ to achieve densification, body will not crack, was almost zero water absorption of ceramic.