摘要
以不同质量比的α-石英和硅混合粉体作为初始原料,利用高能机械球磨和高压高温处理相结合的方法,考察硅元素含量对柯石英形成条件的影响.用X射线衍射(XRD)和Raman谱表征实验产物.结果表明,在高压高温密封条件下,α-石英晶粒表面的Si与氧原子的吸引力较强,阻碍了近邻原子位移,从而制约了从六方α-石英到单斜柯石英的马氏体型同质异构变化.
The mixed powder samples of α-quartz and silicon with different mass ratios were used as raw materials. The influence of silicon content on coesite formation conditions was investigated by means of combining the high-energy mechanical ball-milling with high temperature high pressure （HTHP） method. The experimental products were characterized by X-ray diffraction （XRD） and Raman spectrometry. The results show that Si atom on α-quartz grain surface has a strong affinity for oxygen atom under sealing environment with HTHP, prevents neighbor atoms from displacement and thereby the Markov-type homogeneous change from hexagonal a-quartz to monoclinic coesite is constrained.
出处
《吉林大学学报（理学版）》
CAS
CSCD
北大核心
2012年第4期785-788,共4页
Journal of Jilin University:Science Edition
基金
国家自然科学基金(批准号:50872041)
关键词
α-SiO2
硅
柯石英
机械球磨
高温高压
α-Si02
silicon
coesite
mechanical ball＇milling
high temperature high pressure （HTHP）
