氟金云母类切削陶瓷材料增强强度的研究

The study on strengthening of fluorophlogopite-based dental machinable ceramic

目的 研制一种新型的钙云母增强陶瓷 ,探讨提高氟金云母类切削陶瓷材料强度的方法。方法 以氟金云母类切削陶瓷DicorMGC的材料配方为基础 ,设计钙云母增强陶瓷的材料组成 ,通过基础玻璃制备、晶化热处理 ,得到玻璃陶瓷。用X射线衍射法分析陶瓷的晶相成分 ,用三点抗弯法测量材料的强度。结果 得到了钙云母增强的新型切削陶瓷 ,其三点抗弯强度达到 (2 10 2±14 7)MPa。

Objective To study the strengthening of fluorophlogopite based dental machinable ceramic through developing a new type of calcium mica based ceramic.Methods Based on the analysis of the crystal structure of the fluorophlogopite ceramic of Dicor MGC, the structure of a new type of calcium mica based ceramic was designed and the corresponding composition of the new material was experimented. And the new glass ceramic was obtained through the treatment of glass preparation and nucleation. Then crystal content of the glass ceramic was analyzed by X ray diffraction analysis (XRD) and the 3 point bending strength of the new ceramic was recorded.Results A new type of calcium mica based glass ceramic was developed and had the 3 point bending strength of (210 2±14 7)MPa. Compared with the strength of fluorophlogopite based dental machinable ceramic,such as Dicor MGC, which was reported in the range of 150～180 MPa within inclusive studies,the higher strength of the new ceramic was recorded. Conclusions The fluorophlogopite based dental machinable ceramic could be reinforced through internal strengthening.