仲钨酸铵晶体生长速率常数和活化能研究  

Study on the Nucleation Rate Constant of Ammonium Paratungstate and Activation Energy

作　　者：万林生[1] 章小兵[1] 石忠宁[2] 张耀静[1] 肖学有 陈帮明 

机构地区：[1]江西理工大学材料与化工学院,江西赣州341000 [2]东北大学材料与冶金学院,辽宁沈阳110000 [3]章源钨制品有限公司,江西崇义341200

出　　处：《中国钨业》2004年第6期38-41,共4页China Tungsten Industry

基　　金：江西省自然科学基金项目(965441)

摘　　要：采用“成核期积分平均速率法”,运用阿累尼乌斯实验定律,求出仲钨酸铵晶体生长的表观活化能E表=94.657kJ/mol,得出仲钨酸铵晶体生长速率常数与温度的关系式为kn=8.46×1014exp(-94657/RT)。研究结果表明,温度升高,APT成核速率的增长幅度大于晶体生长速率的增长幅度,结晶产品粒度变细。According to Arrhenius theory, using the method of nucleation period integral mean rate, the apparent activation energy of ammonium paratungstate(APT) crystal growth is calculated as 94.657kJ/mol. At the same time,the ralational expression between APT crystal growth rate constant and temperature is concluded as kn=8.46×1014exp(-94657/RT).The results show that the increasing rate of APT nucleation rate is bigger than that of APT crystal growth rate as temperature increasing and the granularity of crystal product is fine.

关 键 词：晶体生长速率 成核速率 表观活化能 结晶 仲钨酸铵 研究 常数 APT 

分 类 号：O782[理学—晶体学]