摘要
以废玻璃、粉煤灰和氧化钙为原料,采用直接烧结法制备了CaO-Al2O3-SiO2(CAS)微晶玻璃;研究了CaO加入量和烧结温度对微晶玻璃烧结性能、晶相组成、显微结构和抗弯强度的影响。结果表明:随着CaO加入量的增多以及烧结温度的升高,微晶玻璃的体积密度先增大后减小;高的CaO加入量和烧结温度促进了柱状硅灰石晶相的生成;CAS微晶玻璃抗弯强度与体积密度的变化趋势基本相同;加入CaO质量分数为18%、在1 100℃烧结2h制备的CAS微晶玻璃的体积密度最大,为2.26g.cm-3,其主晶相为单一β-硅灰石,结晶度为50.7%,抗弯强度最大,为81.5MPa。
Taking waste glass, fly ash and calcia as raw materials, CaO-A12 O3-SIO2 （CAS） glass-ceramics were prepared from by the direct sintering method, and effects of CaO content and sintering temperature on sintering properties, crystalline composition, microstructure and bending strength of CAS glass-ceramics were studied. The results show that bulk density of the glass-ceramics initially increased and then decreased with the increase of CaO content and sintering temperature, and high CaO adding amount and sintering temperature could promote formating column-shaped wollastonite phase. The bending strength of CAS glass-ceramics exhibited the same tendency as bulk density. The CAS glass-ceramic prepared by 18wtY0 CaO showed maximum hulk density of 2. 26 g · cm^-3 after it was sintered at 1 100℃for 2 h, its cystalline phase was a single wollastonite structure with a crystallinity degree of 50. 7 % and maximum bending strength of 81.5 MPa.
出处
《机械工程材料》
CAS
CSCD
北大核心
2013年第1期71-76,共6页
Materials For Mechanical Engineering
基金
江西省研究生创新基金项目(YC10A111)
