摘要
采用交流阻抗技术研究了在1723—1633 K温度范围内24.3％CaO-23.3％SiO2-13.8％Al2_O_3-15.3％MgO-23.3％TiO_2高钛渣的电导率与TiC含量及粒度的关系。结果表明,渣中的TiC为带电体,降低炉渣的电导率。当TiC含量为0.5％时,炉渣的电导率最小;增加TiC的粒度,炉渣电导率增加。根据炉渣恒温过程中电导率的变化规律,计算了钙钛矿相结晶反应的速率常数和活化能。
By an a.c. impedance technique, the effects of TiC particle on the conductivities of titania slag with composition of 24.3%CaO-23.3%SiO2-13.8%Al2O3-15.3%MgO-23.3%TiO2 were studied in the temperature range of 1723 K to 1633 K. TiC particles in the slag are charge carriers and decrease the conductivities of the slag. The slag containing 0.5%TiC has the lowest conductivity. Increasing the particle size, the conductivities increase. The rate constants and the activation energy of the crystallization reaction of CaTiO3 were calculated based on the first-order kinetic equation.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第5期515-517,共3页
Acta Metallurgica Sinica
基金
国家自然科学基金 50274026
