摘要
综合运用植物模板法和溶胶-凝胶法制成具有藤天然生物形态的45S5玻璃陶瓷。用X射线衍射(X-ray diffraction,XRD)仪、Fourier红外光谱仪(Fourier transform infrared spectroscopy,FTIR)和扫描电子显微镜(scanning electron microscopy,SEM)研究热处理条件和藤模板中45S5凝胶含量对藤向生物形态45S5玻璃陶瓷转变过程中物相、化学成分和形貌的影响。结果表明:随热处理温度升高,无定形45S5凝胶发生晶化,其机理是相分离过程,所得生物形态45S5玻璃陶瓷的主晶相为六方Na2Ca2Si3O9,次级晶相为斜方NaCaPO4和CaSiO3以及未鉴定出的无定形相。FTIR谱分析结果为XRD分析结果提供了佐证;热处理温度和藤模板中45S5凝胶含量对产物形貌具有决定性的影响;在优化条件下,可实现藤多级孔结构向45S5玻璃陶瓷的转移复制。
Biomorphic 45S5 glass-ceramic with the inherent porous structure of cane was prepared by combination of plant replication method and sol–gel process.X-ray diffraction（XRD）,Fourier transform infrared spectroscopy（FTIR）,and scanning electron microscopy were employed to investigate effects of heat treatment conditions and 45S5 gel content in cane template on phase,chemical composition,and morphology of samples during the conversion of cane to biomorphic 45S5 glass-ceramic.Results show that devitrification of amorphous 45S5 gel is induced by a complex phase separation process.Resultant biomorphic 45S5 glass-ceramic consists of hexagonal Na2Ca2Si3O9 as a major crystal phase,orthorhombic NaCaPO4 and CaSiO3 as secondary crystal phases,and an unknown amorphous phase.The FTIR results confirm the results from XRD analysis.Both the heat treatment temperature and 45S5 gel content in the cane plate have a decisive effect on the morphology of the products.Under the optimum processing conditions,hierarchical porous structure of cane can be converted to 45S5 glass-ceramic.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2011年第9期1472-1476,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50603020,50773062)
新世纪优秀人才支持计划(NCET-07-0673)
陕西省自然科学基金(SJ08-ZT12)资助项目
