Co_2O_3和K_2Cr_2O_7对RCSF微晶玻璃性能的影响

Influence of Co_2O_3 and K_2Cr_2O_7 on Colouring and Crystallization of R_2O-CaO-SiO_2-F Glass-ceramics

利用差热分析,可见-紫外光谱,X射线衍射及扫描电镜,分析研究了Co2O3和K2Cr2O7对硅碱钙石玻璃着色及晶化过程的影响规律。结果表明:着色剂K2Cr2O7导致玻璃显绿色,Co2O3使玻璃显蓝色。加入着色剂的微晶玻璃与其母体玻璃相比,光谱曲线整体向长波方向移动,微晶玻璃颜色偏浅。加入适量的K2Cr2O7着色剂可促进该系统微晶玻璃主晶相硅碱钙石的析出,但是着色剂Co2O3抑制了该系统微晶玻璃晶相的析出,加入0.1%Co2O3的微晶玻璃析出的主晶相为硬硅钙石,只有少量硅碱钙石析出。

Influence of Co2O3 and K2Cr2O7 on Colouring and Crystallization of R2O-CaO-SiO2-F glass-ceramics was investigated by means of DTA,UV-visible spectrophotometer X-ray diffraction（XRD）and scanning electron microscopy（SEM）.The results indicate that the color of adding K2Cr2O7 colorant glass is green and the color of adding Co2O3 colorant glass is blue.The color of the glass ceramiacs is lighter than that of their parent glasses,and the spectrum curve of glass-ceramics is longer than that of their parent glasses.A little K2Cr2O7 colorant promote the main Crystalline phase fibrous canasite（K2Na4Ca5Si12O30F4）.But a little Co2O3 colorant restrain the crystalline phase.When the Co2O3 content was 0.1%,the main Crystalline phase was columnar xonotlite（Ca6Si6O17（OH）2）,however,there was a litte the Crystalline phase fibrous canasite（K2Na4Ca5Si12O30F4）.