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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

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【Author】 ZHANG Guang-qiang 1,XU Da-peng 1,WANG De-yong 1,ZHANG Lin 1,2,SONG Geng-xin 1,XUE Yan-feng 1,SUN Jing-shu 1,LI U Xiao-mei 1,SU Wen-hui 1,3,4 (1.College of Physics,Jilin University,Changchun 130021,China;2.Department of Mathematics and Mechanics,Heilongjiang Institute of Science and Technology,Harbin 150027,China;3.Center for the Condensed-matter Science and Technology,Harbin Institute of Technology,Harbin 150001,China;4.International Center for Materials Physics,Chinese Academy of Sciences,Shenyang 110015,China)

【机构】吉林大学物理学院；

【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.更多还原

【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.更多还原

【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；

【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

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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

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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