纯钛冠桥铸造包埋用耐火材料操作性能的研究  

Technical operation of refractory investment for titanium crown and bridge

作　　者：杨瑟飞[1] 郭天文[2] 王有序[3] 金志浩[1] 

机构地区：[1]西安交通大学材料科学与工程学院陶瓷研究所,710049 [2]西安第四军医大学口腔医学院修复科 [3]西安西北工业大学凝固技术实验室

出　　处：《实用口腔医学杂志》2005年第6期746-748,共3页Journal of Practical Stomatology

基　　金：国家自然科学基金资助项目(30171022)

摘　　要：目的:探明自行研制包埋材料(FUS-invest)的各项工艺操作参数。方法:使用FUS-invest对粉液比、粘结剂与促硬剂之比、粉料占耐火材料的百分比及搅拌时间4因素分为3水平,进行正交设计,对各实验组的浆体流动性、初终凝时间及最佳实验组的粒度级配进行测定。结果:粉液比对流动性、初终凝时间影响最大。当粉液比为7.5∶1、粉料占耐火材料的35%时,浆料有较好的流动性和适宜的初终凝时间。当细度系数为300的细粉占31.31%、100的中等颗粒占40.09%、70的粗颗粒占18.05%、粘结剂与促硬剂的比为200∶1时能够浇铸出完整的纯钛冠铸件,表面也较为光滑。结论:粉液比为7.5∶1,粉料占耐火材料的35%,粘结剂与促硬剂的比为200∶1是FUS-invest的最佳操作工艺参数,能浇铸出较为理想的纯钛铸件。Objective ： To study the technical operation of self-developed investment （FUS-invest） for titanium crown and bridge. Methods：Orthogonal design was done. Four factors were taken into account, i.e. water/powder ratio, adhesive/hardener ratio, fine powder proportion in refractory and agitation time. And each factor was ranked into three levels. Slurry fluidity, initial setting time and setting time of every experiment group were studied. Grain size graduation of the best group was measured. Results ： Fluidity, initial setting time and setting time were most greatly affected by water/powder ratio and secondly by fine powder proportion in refractory. When water/powder ratio was 7.5 ： 1 and the content of fine powder was 35% , slurry fluidity was better and initial setting time and setting time were appropriate. When the content of fine powder of AFS fineness number 300 was 31.31% , fineness number 100 was 40.09% , fineness number 70 was 18.05% and adhesive/hardness ratio was 200： 1, the perfect titanium castings could be fabricated. Conclution ：The best rules of technical operation for perfect titanium castings are water/powder ratio 7.5： 1, the content of fine powder 35% and adhesive/hardener ratio 200： 1.

关 键 词：纯钛 铸造 包埋料 粉液比 

分 类 号：R783.1[医药卫生—口腔医学]