制备云母复相微晶玻璃及机械性能  

Preparation and Mechanical Properties of Mica Composite Glass-Ceramics

作　　者：余丽萍[1] 汪萍[1] 肖汉宁[2] 凌军[1] 

机构地区：[1]湖南师范大学化学化工学院,湖南长沙410081 [2]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《稀有金属材料与工程》2008年第A01期654-657,共4页Rare Metal Materials and Engineering

基　　金：湖南师范大学青年基金项目(23040612)

摘　　要：以烧结法制备了云母复相微晶玻璃,并用差示扫描仪(DSC)、X射线衍射仪(XRD)及扫描电子显微镜(SEM)等测试方法对制备的材料进行研究。结果表明:引入的云母粉类型不同,对试样最终的生成晶相没有影响,但是未晶化的云母粉更有利于试样的致密烧结,MgO的大量存在抑制了莫来石相的生成,Al_2O_3含量的提高有利于尖晶石相的析出,添加40%(质量分数)未晶化云母粉的试样在1200℃烧结,其弯曲强度达214MPa。The composite of mica glass-ceramics was prepared and characterized by differential scanning calorimetry （DSC）, X-ray diffractometry （XRD） and scanning electron microscopy （SEM）. The use of different types of mica powders did not change the crystal phases of the products. The use of nano-crystalline mica powders promoted densification of the materials. The mullite phase was suppressed in the ceramics due to the presence of MgO. The increase of Al2O3 content enhanced precipitation of the spinel phase. The strength of the ceramics from 40wt% nonocrystalline powders and sintered at 1200 ℃ reached 214 MPa.

关 键 词：云母复相微晶玻璃 烧结法 弯曲强度 

分 类 号：TQ171.7[化学工程—玻璃工业]