Na2WO4-ZnO-WO3熔盐体系的电导率

来源期刊:中国有色金属学报2005年第7期

论文作者:李运刚 翟玉春 王娜 梁精龙

文章页码:1139 - 1144

关键词:Na2WO4-ZnO-WO3体系; 电导率; 镀钨

Key words:Na2WO4-ZnO-WO3 system; conductivity; electrodepositing-tungsten

摘    要:用平行四电极法研究了Na2WO4-ZnO-WO3熔盐体系在x(Na2WO4)为0.40~1.00, x(ZnO)为0~0.4, x(WO3)为0~0.50组成范围内的电导率。 结果表明: 体系的电导率与温度的倒数呈指数关系; 体系各组元对电导率的影响规律受x(ZnO)与x(WO3)比值的控制, 当该比值小于1时, 用ZnO逐步替代Na2WO4将导致体系的电导率增大, 用Na2WO4逐步替代WO3也将导致体系的电导率增大, 用WO3逐步替代ZnO将导致体系的电导率减小; 当该比值大于1时, 其规律正好相反; 在Na2WO4含量一定的条件下, x(ZnO)与x(WO3)的比值为1时体系的电导率最大。

Abstract: The conductivity of Na2WO4-ZnO-WO3 system was studied by parallel four electrodes method, with the composition of x(Na2WO4) 0.40-1.00, x(ZnO) 0-0.4, x(WO3) 0-0.50. The results show that there is an exponential relation between conductivity and reciprocal value of temperature in the system. The ratio value of x(ZnO) to x(WO3) controls the influence rule of various components on conductivity of the system. When the ratio value is less than 1, both gradiently substituting ZnO for Na2WO4 and Na2WO4 for WO3 raise the conductivity, while gradiently substituting WO3 for ZnO decreases the conductivity. When the ratio value is greater than 1, the result is reverse. When the content of Na2WO4 is constant, the conductivity of the system is maximal at the ratio value of x(ZnO) to x(WO3) as 1.

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