Al_2O_3对R_2O-CaO-SiO_2-F系废渣微晶玻璃析晶与性能的影响  

Influence of Al_2O_3 on the Crystallization and Properties of R_2O-CaO-SiO_2-F System Glass-ceramics Made from Residual

作　　者：闫鑫坤 黄永前[1] 万里佳 

机构地区：[1]四川大学材料科学与工程学院,成都市610065

出　　处：《玻璃》2018年第3期1-5,共5页Glass

摘　　要：以花岗岩废渣为主要原料,用熔融法制备了R_2O-CaO-SiO_2-F系微晶玻璃。采用差示扫描量热法、X射线衍射、扫描电子显微镜等测试方法研究了Al_2O_3含量对RO-CaO-SiO_2-F系微晶玻璃的析晶与性能的影响。结果表明:随着Al_2O_3含量的增加,硅碱钙石与硬硅钙石晶体细化;Al_2O_3含量(质量分数)为6.0%的基础玻璃经560℃核化2 h、910℃晶化2 h后的主晶相为硅碱钙石,其抗弯强度和断裂韧性分别为(154±20)MPa、(2.37±0.12)MPa·m^(-1/2);当Al_2O_3含量增加至6.5%时,硅碱钙石减少、氟化钙增多,力学性能降低。R_2O-CaO-SiO_2-F system glass-ceramics, the granite residual as the main raw materials, were prepared by melting technique. The influence of Al_2O_3 content on the crystallization and properties of R_2O- CaO-SiO_2-F system glass-ceramics were investigated systematically by differential scanning calorimetry, X-2 ray diffraction, and scanning electron microscope, etc. The results show that grain refinement occurs in the canasite and xonotlite crystal with the increase of Al_2O_3 content. After being nucleated at 560℃ for 2 h and then crystallized at 910℃ for 2 h, the main phases of the sample with 6.0 wt% Al_2O_3 were canasite, for which the value of flexural strength and fracture toughness reach up to( 154±20) MPa and( 2.37±0.12) MPam^(-1/2), respectively. The content of Al_2O_3 increased to 6.5 wt%, furthermore, canasite decreased with increased calcium fluoride, which led to the decrease in mechanical properties.

关 键 词：AL2O3 花岗岩废渣 微晶玻璃 硅碱钙石 样品力学性能 

分 类 号：TQ171[化学工程—玻璃工业]