Synthesis of ZrSiO_4 and Coesite in SiO_2-ZrO_2 System Under High Pressure  

作　　者：XUE Yan-feng XU Da-peng ZHANG Guang-qiang ZHOU Xian-feng DING Zhan-hui LIU Xiao-mei SU Wen-hui 

机构地区：[1]College of Physics, Jilin University, Changchun 130012, P. R. China [2]Center for the Condensed-MatterScience and Technology, Harbin Institute of Technology, Harbin 150001, P. R. China [3]International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, P. R. China

出　　处：《Chemical Research in Chinese Universities》2008年第2期135-137,共3页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos30370406, 10374022 and 10674034)

摘　　要：ZrSiO4 and coesite were obtained under high-pressure and high-temperature from the nano precursor of a-SiO2 and ZrO2. XRD and Raman measurements indicate that ZrSiO4 was formed at a temperature higher than 920 ℃ under a pressure of 3.6 GPa. As the pressure increased to 3.9 GPa, the ZrSiO4 formation temperature was reduced to 815 ℃. The formation temperature for coesite was 990 ℃ under 3.9 GPa. The lower formation temperature for ZrSiO4, as compared to that for coesite, provided an experimental evidence that the coesite in the Earth＇s surface usually occurs as inclusions in ZrSiO4.ZrSiO4 and coesite were obtained under high-pressure and high-temperature from the nano precursor of a-SiO2 and ZrO2. XRD and Raman measurements indicate that ZrSiO4 was formed at a temperature higher than 920 ℃ under a pressure of 3.6 GPa. As the pressure increased to 3.9 GPa, the ZrSiO4 formation temperature was reduced to 815 ℃. The formation temperature for coesite was 990 ℃ under 3.9 GPa. The lower formation temperature for ZrSiO4, as compared to that for coesite, provided an experimental evidence that the coesite in the Earth＇s surface usually occurs as inclusions in ZrSiO4.

关 键 词：ZRSIO4 COESITE High pressure synthesis Mechanical ball milling 

分 类 号：O614.412[理学—无机化学]