(1. 東北大學(xué) 材料與冶金學(xué)院， 沈陽(yáng) 110004;
2. 河北理工大學(xué) 冶金與能源學(xué)院， 唐山 063009)
摘 要: 用平行四電極法研究了Na2WO4-ZnO-WO3熔鹽體系在x(Na2WO4)為0.40～1.00， x(ZnO)為0～0.4， x(WO3)為0～0.50組成范圍內(nèi)的電導(dǎo)率。 結(jié)果表明： 體系的電導(dǎo)率與溫度的倒數(shù)呈指數(shù)關(guān)系； 體系各組元對(duì)電導(dǎo)率的影響規(guī)律受x(ZnO)與x(WO3)比值的控制， 當(dāng)該比值小于1時(shí)， 用ZnO逐步替代Na2WO4將導(dǎo)致體系的電導(dǎo)率增大， 用Na2WO4逐步替代WO3也將導(dǎo)致體系的電導(dǎo)率增大， 用WO3逐步替代ZnO將導(dǎo)致體系的電導(dǎo)率減小； 當(dāng)該比值大于1時(shí)， 其規(guī)律正好相反； 在Na2WO4含量一定的條件下， x(ZnO)與x(WO3)的比值為1時(shí)體系的電導(dǎo)率最大。
關(guān)鍵字: Na2WO4-ZnO-WO3體系; 電導(dǎo)率; 鍍鎢
molten salt system
（ 1. School of Materials and Metallurgy,
Northeastern University, Shenyang 110006, China;
2. School of Metallurgy and Energy,
Hebei Polytechnic University, Tangshan 063009, China）
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.
Key words: Na2WO4-ZnO-WO3 system; conductivity; electrodepositing-tungsten
