粉浆涂塑铝瓷冠铝瓷粉浆分散剂的研究

A study on aluminous ceramic slip dispersant of slip casting aluminous ceramic crown

粉浆涂塑铝瓷冠是新近推出的一种全瓷修复系统，具有强度高、边缘适合性好透光性好等诸多优点。它是通过涂塑铝瓷粉浆于专用代型表面成型的，制备性能良好的铝瓷粉浆是获得高强度铝瓷冠的重要前提。本研究采用沉积百分含量为铝瓷粉浆分散效果的评判指标，对ＧＩ－Ｉ型粉浆涂塑铝瓷粉浆分散剂的分散性能及使用条件进行了研究。结果表明，粉浆涂塑铝瓷核冠铝瓷粉浆分散剂在碱性环境下具有良好的分散性能，并且加入量小，仅需０．２～０．５ｗｔ％。

Slip casting aluminous ceramic crown is a new all-ceramic system with high flexural strength,optimum marginal fit and improved aesthetics.It was made of slip casting aluminous ceramic onto a special plaster die.In order to get a strong aluminous ceramic crown,a key factor is to make a stability powder slip of aluminous.Sendimented volume fraction of the powder slip had been measwred for slip casting aluminous ceramic in order to achieve the best casting conditions.The results showed that the dispersant of slip castingaluminous ceramic suspended the powder well when the slip was in the condition of pH>8.5,the weight percent of dispersant was 0.2-0.5wt%.