节点文献
纳米SiO2在高压高温下的结构转化
Structural Transition of Nanometer SiO2 Powders under High Pressure and High Temperature
【摘要】 以纳米SiO2粉体为原料,在高压高温下研究其晶化过程.XRD和Raman谱表明,纳米SiO2在常压1 000~1 600℃条件下,晶化成α-方石英和少量的鳞石英;在2.0~3.5 GPa,320~1 100℃条件下,晶化成α-石英;在3.9 GPa,320~1 100℃条件下,晶化成柯石英.
【Abstract】 The crystallization process of nanometer SiO 2 powder under high pressure and high temperature was investigated.The experiment results show that nanometer SiO 2 powder crystallizes to α -cristobalite with a little tridymite under normal pressure at 1 000~1 600 ℃,crystallizes to α -quartz under 2.0~3.5 GPa and 320~1 100 ℃,and crystallizes to coesite under 3.9 GPa and 320~1 100 ℃.The temperature of coesite formation from nanometer SiO 2 is much lower than that from common α -quartz.
【关键词】 纳米SiO2;
α-石英;
柯石英;
高压高温;
晶化;
【Key words】 nanometer SiO 2; α -quartz; coesite; high pressure and high temperature; crystallize;
【Key words】 nanometer SiO 2; α -quartz; coesite; high pressure and high temperature; crystallize;
【基金】 国家自然科学基金(批准号:3037040610674034)
- 【文献出处】 吉林大学学报(理学版) ,Journal of Jilin University(Science Edition) , 编辑部邮箱 ,2008年02期
- 【分类号】O52
- 【被引频次】11
- 【下载频次】183