Na_2XO_4(X=Cr、Mo、W)固-固相变贮热的测定  

The Determination of Na_2XO_4(X=Cr、Mo、W) for Solid-Solid Phase Transitions in thermal Energy Storage

作　　者：赵睿新[1] 

机构地区：[1]山西财经大学环境经济系,山西太原030016

出　　处：《化学工程师》2002年第1期30-31,共2页Chemical Engineer

摘　　要：利用DTA -TG热分析技术研究了无机塑晶材料Na2 XO4(X =Cr、Mo、W)的热性能 ,实验数据表明 ,三种材料是一种有前途的固 -固相变贮热材料。其固 -固相变贮热的机理是随着温度升高 ,三种晶体的晶格发生畸变 ,晶型由低对称的晶系向高对称的晶系转变 ,同时引入振动和转动无序 。DTA-TG was used to determine the thermal properties for solid-solid of inorganic plastic crystal Na 2XO 4(X=Cr?Mo?W).Experimental data showed that three materials is a prospective can didate materials for heat storage.The mechanism of Na 2XO 4(X=Cr?Mo?W)crystal for solid-solid phase transitions are known to transform from a low symmetric structure to a highly symmetric structure as the temperature in increased.The molecules in high temperature crystal are known to be rotationally and vibrationally disordered to absorb heat.

关 键 词：固-固相变 DTA方法 贮能材料 铬酸钠 钼酸钠 钨酸钠 Na2XO4 

分 类 号：O614.112[理学—无机化学]