摘要
以 TEOS、硝酸铝、醋酸钡为原料,采用溶胶-凝胶法分别制备了 BaO-SiO_2与 Al_2O_3-SiO_2干凝胶粉末,以此为初始原料经1000℃煅烧后得到了平均粒径为1～1.5μm 的β-硅铝酸钡粉末.研究了溶剂的用量、TEOS 的预水解对溶胶凝胶化的影响.采用 DTA、GC、XRD 研究了 BaO(Al_2O_3)-SiO_2与 BaO-Al_2O_3-SiO_2凝胶粉末在加热过程中的物理、化学变化及晶相转变.借助电子显微镜观察了凝胶粉末的粒度.
BaO-SiO_2 and Al_2O_3-SiO_2 dried gel powders were prepared respectively by the sol-gel
process using TEOS,aluminum nitrate and barium acetate as raw materials.By using them
as starting materials,β-barium alumino-silicate powders with small particle size were obtained
after calcined at 1000℃.The effect of solvents and prehydrolysis of TEOS on the gelling
time was studied.The physical and chemical changes,and phase transformation of gel powders
for BaO(Al_2O_3)-SiO_2 and BaO-Al_2O_3-SiO_2 systems during heating were examined using DTA,
GC and XRD.The particle sizes of gel powders obtained were also observed by means of SEM
and TEM.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第3期334-340,共7页
Journal of Inorganic Materials
关键词
溶胶-凝胶法
粉末
陶瓷
Sol-gel process
BaO-Al_2O_3-SiO_2 system
Powders
Ceramics
BaO-SiO_2 system
