DEVELOPMENT OF DENTAL PORCELAIN MATERIAL PRODUCED UNDER MILD CONDITION OF LOW TEMPERATURE AND PRESSURE

以氧化镁和磷酸二氢铵混合物为固化剂，瓷粉为芯材的加热温度为700 ℃，低于本研究所用瓷粉的熔化温度。此外，还提出了添加长度为10-20 μ m、直径为0.3-1.0 μ m的晶须对提高所制备陶瓷的抗弯强度是非常有用的。用含2或4wt%钛酸钾（PT）晶须的氧化锆溶液（ZP）处理瓷粉制成的陶瓷，其抗弯强度表现出优异的高。PT晶须的加入对ZP陶瓷的耐磨性没有影响。含PT晶须的ZP陶瓷表面粗糙度略有增加。然而，由这种材料形成的嵌体的适合性较差。

The heating temperature of a mixture of magnesia and ammonium dihydrogenphosphate as setting materials and porcelain powder as core is 700ﾟC,the temperature was lower than the fusing temperature of the porcelain powder using this study. Furthermore, it was suggested that addition of whisker of 10-20 mum in length and 0.3-1.0 mum in diameter was very useful for improvement of bending strength of the ceramics prepared. The bending strength of the ceramics consisted of porcelain powder treated with zirconia solution (ZP) containing 2 or 4 wt% potassium titanate (PT) whisker showed excellently high. Addition of PT whisker did not affect on the wear-resistance of ZP ceramics. The surface roughness of ZP ceramics containing PT whisker increased slightly. While, the fitness of the inlay formed from this material was poor.