Co_6W_6C化合物的热力学研究  

Thermodynamic Properties of Co_6W_6C Compound

作　　者：范金莲 刘雪梅[1] 王海滨[1] 宋晓艳[1] 

机构地区：[1]北京工业大学新型功能材料教育部重点实验室,北京100124

出　　处：《稀有金属材料与工程》2017年第11期3352-3356,共5页Rare Metal Materials and Engineering

基　　金：国家高技术研究发展计划("863"计划)(SS2013AA031401);国家杰出青年科学基金(51425101);国家自然科学基金(51174009)

摘　　要：以高纯钨、钴、碳粉为原料,在真空条件下制备获得物相纯净的Co_6W_6C化合物,对Co_6W_6C进行系列实验测定并结合计算得出了其相关的热力学参数。结果表明:在原料粉中碳含量为0.98%~1.06%(质量分数)、真空反应温度为1000℃、保温时间为1 h的条件下,可制备获得物相纯净的Co_6W_6C。结合其等压热容及1173 K下氧化反应的反应焓测定结果,通过计算获得了Co_6W_6C的标准摩尔熵(S_m~Θ)、标准摩尔生成焓(Δ_fH_m~Θ)等热力学参数以及其等压热容(C_p)、焓(H)、熵(S)和吉布斯自由能(G)等基础热力学参量随温度变化的函数关系。W,Co and carbon black powders were used as raw materials to prepare the single phase Co_6W_6C compound.By optimizing the preparation parameters,i.e.with the carbon black addition of 0.98 wt%~1.06 wt%and the reaction temperature kept at 1000°C for 1 h in the vacuum condition,pure compound of Co_6W_6C was made.Subsequently,by a series of experimental measurements,the thermodynamic parameters of Co_6W_6C were obtained,based on which thermodynamic calculations were performed.The thermodynamic properties such as the standard molar entropy（S_m~Θ）,standard molar enthalpy of formation（Δ_f H_m~Θ）,isobaric heat capacity（C_p）,enthalpy（H）,entropy（S）and Gibbs free energy（G）were obtained as functions of temperature.

关 键 词：Co6W6C 真空反应 热力学计算 

分 类 号：TG135.5[一般工业技术—材料科学与工程]