原位化学合成法制备氧化锆-白榴石复相烤瓷粉研究  

Study on In-situ Synthesis of Dental Zirconia-leucite Porcelain Powder

作　　者：廖立[1] 谢璐[2] 王珏[2] 龚家鑫[2] 朱丽哲[2] 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川大学华西口腔医学院,四川成都610041

出　　处：《四川大学学报（工程科学版）》2010年第6期192-195,共4页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家青年自然科学基金资助项目(50904046)

摘　　要：以ZrO(NO3)2、Al(NO3)3和K2SiO3等为原料,采用聚乙烯醇和氨水成冻先制备成凝胶,然后通过高温烧结法原位合成氧化锆/白榴石复合烤瓷粉,并对其力学性能进行了检测。结果表明,采用"原位化学合成法"制备的复合烤瓷粉的综合性能明显优于"间接合成法"制备的复合烤瓷粉,其抗弯强度达到105.3MPa、断裂韧性达到3.3MPa/m1/2、金瓷结合强度达到42.1MPa;样品中同时存在白榴石和氧化锆2种晶相,这既有利于提高烤瓷材料的力学性能,又有助于调节烤瓷材料的膨胀系数,使之与牙用镍铬合金相匹配。The dental zirconia-leucite porcelain powder was synthesized in-situ by high temperature solid-state method using potassium feldspar,potassium carbonate and zirconium oxide as raw materials.The mechanical properties and coefficient of thermal expansion of porcelain powder were tested.The experimental results showed that the bending strength,the fracture toughness and the intensity of metal-ceramic integrated of porcelain powder prepared by the in-situ synthesis method were much better than those prepared by the indirect synthesis method,and reached 105.3 MPa,3.3 MPa /m1/2 and 42.1 MPa,respectively.There were two kinds of crystalline phases existing in the porcelain powder,zirconium oxide and leucite,which would not only be good for increasing the mechanical property,but also contribute to adjusting the expansion coefficient of the ceramic material to match for Ni-Cr dental alloys.

关 键 词：原位 氧化锆 白榴石 烤瓷粉 

分 类 号：TF123[冶金工程—粉末冶金]