摘要
探讨以镍渣为主要原料采用熔融法制备建筑用微晶玻璃．研究引入Cr2O3作为晶核剂的镍渣微晶玻璃的成核及晶化过程．利用DSC测试来确定基础玻璃的晶化温度，并利用修正的Johnson—Mehl—Avrami（J／VIA）方法初步计算以镍渣为主要原料所制备的基础玻璃在加入质量分数2％的Cr2O3作为晶核剂后的结晶活化能E及结晶动力学参数k（Tp），计算结果分别为E=371．1kJ·mol^-1，结晶动力学参数k（Tp）=0．29．采用XRD、SEM和光学显微镜测试、分析及观察方法来鉴定、分析微晶玻璃试样的主晶相及微观结构．结果显示，加入晶核剂的基础玻璃从930℃开始均匀地析出透辉石相晶体；随着温度的升高，晶体尺寸也逐渐增大，在温度达到950℃后，对样品进行30min保温热处理，样品中晶体尺寸达到10～15μm．
The glass-ceramic was produced by nickel slag as primary raw material. The crystallization process of the glass-ceramic was analyzed and the crystallization temperature was determined by DSC. The activation E and crystallization kinetic parameter k （Tp） of the glass added 2 % Cr203 by weight as nucleation agent were calculated by the modified Johnson-Mehl-Avrami （JMA） method, and the results were 371. 1 kJ· mol^- 1 and 0.29, respectively. The characters of crystals appearing in glass were analyzed by XRD, SEM and optical microscope observation methods. It is shown that the crystallization process is observed between 930 ℃ and 950℃, and the size of crystals is 10-15μm after heat treatment at 950℃ for 30 min.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2007年第2期168-172,共5页
Journal of University of Science and Technology Beijing
关键词
镍渣
微晶玻璃
结晶化
动力学参数
nickel slag
glass-ceramic
crystallization process
kinetic parameter
