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1000～1600℃条件下，晶化成α-方石英和少量的鳞石英；在2．0～3．5GPa，320～1100℃条件下，晶化成α-石英；在3．9GPa，320～1100℃条件下，晶化成柯石英．
The crystallization process of nanometer SiO2 powder under high pressure and high temperature was investigated. The experiment results show that nanometer SiO2 powder crystallizes to α-cristobalite with a little tridymite under normal pressure at 1 000～ 1 600 ℃, crystallizes to a-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 SiO2 is much lower than that from common a-quartz.
出处
《吉林大学学报（理学版）》
CAS
CSCD
北大核心
2008年第2期311-313,共3页
Journal of Jilin University:Science Edition
基金
国家自然科学基金(批准号:3037040610674034)
关键词
纳米SIO2
α-石英
柯石英
高压高温
晶化
nanometer SiO2
α-quartz
coesite
high pressure and high temperature
crystallize
