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高温焙烧对石英砂表面的影响
EFFECT OF CALCINATION ON THE SURFACE OF SILICATE SANDS
【摘要】 采用电子探针和透射电子显微镜研究了石英砂经900℃高温焙烧前后表面元素和杂质相颗粒的变化。结果表明:石英砂表面的O/Si比偏离SiO2的化学比例,高温焙烧后其表面的O/Si比接近为2。石英砂表面存在大量纳米尺寸的杂质相,高温焙烧使杂质相脱落,增大了石英的裸露表面积。
【Abstract】 Elements and impurity particles onthe surface of raw silicate sands and the sands after calcination at 900 ℃ were examined by electron microprobeand TEM（transmission electron microscopy）.It was found that the rate of O/Si of the surface of raw silicate sands deviates from that of SiO2.However,the rate of O/Si is approximate to 2 after calcination.There are much nano-particles of impurities on the surface of silicate sands,and it is the calcination thatmade the particles of impurities broken off,and also made the surface of the sands nudity more.
【关键词】 石英砂表面；
焙烧；
杂质相颗粒；
O/Si比；
【Key words】 surface of silicate sand； calcinations； particle of impurity； rate of O/Si；
【Key words】 surface of silicate sand； calcinations； particle of impurity； rate of O/Si；
【基金】 山东自然科学基金资助项目(y2003f03)
- 【文献出处】 矿物学报 ,Acta Mineralogica Sinica , 编辑部邮箱 ,2005年04期
- 【分类号】P579
- 【被引频次】21
- 【下载频次】277