Characterization of Ultrafine Glassy Powder for Al-Si-Ca-P-O-F Polynary System by Liquid Precipitation
The ultrafine glassy powder of Al-Si-Ca-P-O-F polynary system was prepared by liquid precipitation method with several inorganic compounds as reactants containing the ions such as Al3+, SiO32-,P3O105-,Ca2+,F-,respectively. The powder was heat-treated in the range of temperature from 773 to 1173K and its crystallized processes were ascertained. The morphology,composition. bonding state and structure,crystallized behavior of the glassy powder were characterized by means of TEM,XRD, EDAX,IR,DSC etc methods. The results show that the powder containing Al, Si,Ca,P,O,F elements belongs to typical amorphous state. and the particles appeared hollow and near spherical morphology with the size from 30 to 70nm. The hollow particles collapsed as plate like conglutination state and a series of crystallized phases CaF2,Al2SiO5,Ca2SiO4, and Ca3(PO4)2 were separated sequentially during heat treatment in the range of temperature above. The characteristics of the glassy powder are similar to those of popular melting-quenched glass of the system. The network structure of the glass was mainly formed by the tetrahedrons of [SiO4],[AlO4] and [PO4],which were linked by the oxygen atoms of the angle in the tetrahedrons.
liquid precipitation Al-Si-Ca-P-O-F glass ultrafine powder characterization
G.C. Yuan Q.G Wu G.X. Zeng Z.Y. Ling
Faculty of Material and Energy,Guangdong University of Technology,P.R.China Faculty of aterial and Energy,Guangdong University of Technology,P.R.China School of Stomatology,Sun Yat-Sen University,P.R.China
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
433-436
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）