【作者】 胡慧萍； 韦亮平； 张黎； 陈启元； 谭军；

【Author】 Hu Huiping~*,Wei Liangping,Zhang Li,Chen Qiyuan,Tan Jun(Institute of Metallurgy and Application of Physical Chemistry, College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China)

【机构】 中南大学化学化工学院冶金及应用物理化学研究所；

【摘要】 对天然斜长石进行了球磨,并采用TGA,IR,XRD,粒度分析等方法对球磨前后的斜长石进行表征,研究了球磨作用对斜长石热行为及结构的影响。在氮气气氛下的TGA分析表明,在303～523K及523～1473K之间,球磨前后的斜长石均表现为热失重,但与未球磨斜长石相比,球磨后的斜长石失重率均增大,随着球磨时间的延长,斜长石的失重率均先增大再减小。结构分析表明,在303～523K之间,斜长石热失重主要是由于矿物中的吸附水和结晶水受热逸出引起的;而523～1473K之间,斜长石热失重可能主要是由于斜长石中的绿泥石和角闪石等杂质羟基缩合脱水引起的。球磨后斜长石和未球磨斜长石的热行为差异主要与球磨作用导致的斜长石晶格畸变增大和晶粒尺寸降低有关。更多还原

【Abstract】 Effects of ball milling on thermal behaviors of plagioclase was investigated.Natural plagioclase was milled and characterized by TGA,IR,XRD and particle size analysis.The TGA experiments under nitrogen atmosphere showed that the mass loss of ball-milled plagioclase,from 303 to 523 K and from 523 to 1473 K,was larger than that of unmilled plagioclase,and the value first increased with milling time with a maximum value achieved,beyond which the value began to decrease,respectively. The structural analysis showed that the mass loss from 303 to 523 K mostly attributed to the evaporation of the absorbed and crystal water in the mineral;and the mass loss from 523 to 1473 K maybe mainly associate with the dehydration of hydroxide of the impurities(mainly chlorite and hornblende) during the thermal treatment,respectively.The differences between the thermal behaviors of ball milled plagioclase and unmilled plagioclase are consistent with the increase of lattice distortion and the decrease of crystallite size resulted in ball milling.更多还原