摘要
将Foitite电气石在400～1000℃×2 h进行焙烧处理。采用XRD、FTIR、RAMAN光谱等研究热处理对电气石粉体物相结构、表面结构的影响。结果表明:随着热处理温度升高,电气石晶胞体积逐渐减小,在700℃具有最小值;热处理温度对电气石的表面电性有较大影响,随温度升高,电气石的Zeta电位呈增大趋势,当温度达到500℃时,Zeta电位值最大为-47.5 mV;经过热处理后,电气石物相发生明显变化,由镁电气石转化为布格电气石,当温度高于900℃,出现烧结现象,电气石开始分解,分解产物为Fe2O3和Al4B2O9;热处理不仅可使电气石中的Fe2+氧化成Fe3+,还可改变不同价态铁离子在结构中的占位(Y、Z位置)。
Foitite tourmaline was heated at 400-1000 ℃ for 2 h.Effect of heat treatment on tourmaline powder phase structure,surface structure of the foitite tourmaline was studied by means of X-ray diffraction,Fourier transform infrared absorption spectroscopy and laser Raman spectroscopy.The results show that tourmaline cell volume decreases with increasing the heat treatment temperature,and has a minimum value at 700 ℃.The heat treatment temperature has great influence on the surface electrical properties of tourmaline,when the temperature reaches 500 ℃,Zeta potential value is up to-48 mV.After heat treatment,the phase of tourmaline has been changed from Foitite tourmaline into Bouguer tourmaline,when the temperature is higher than 900 ℃,tourmaline decomposes to form Fe2O3 and Al4B2O9.Heat treatment can not only oxide Fe2＋ to Fe3＋,but also change the site of ions in the structure of tourmaline（Y,Z position）.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2012年第3期16-21,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51004066)
四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地开放课题基金(10ZXFK12,10ZXFK04)
先进建筑材料四川省重点实验室开放项目(09ZXXK09)
关键词
电气石
热处理
显微结构特征
tourmaline
heat treatment
microstructure characteristics
