用DSC法测定Mn_xFe_(2-x)P_(0.4)Si_(0.6)化合物比热容  

Measurement of Specific Heat Capacity of Mn_xFe_(2-x)P_(0.4)Si_(0.6) Compounds by DSC Method

作　　者：石海荣[1] 特古斯[1] 张天臣[1] 海山[1] 耿遥祥[1] 王全晶[1] 

机构地区：[1]内蒙古师范大学内蒙古自治区功能材料物理与化学重点实验室,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2011年第6期589-591,595,共4页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51161017);内蒙古自治区自然科学重点项目(20080404ZD09)

摘　　要：采用差示扫描量热法测定了MnxFe2-xP0.4Si0.6化合物的比热容.结果表明,该系列化合物都出现了比热容的反常峰,反常峰对应于化合物的一级相变.x=1.25,1.30,1.35,1.40时,对应的相变温度分别为317.7,306.2,290.5,279.4K,相变潜热分别为6 226.1,5 461.1,4 253.8,3 116.0J/kg,且相变潜热随着相变温度的降低而减小.The specific heat of MnxFe2-xP0.4Si0.6 compounds was investigated by using differential scanning calorimetry method. The results show that there are abnormal peaks in the specific-heat curves, the abnormal peaks corresponding to the first-order phase transitions. The phase transition temperature is 317.7,306.2,290.5,279.4K,the latent heat of the transition is 6226.1,5461.1,4253.8,3116.0 J/kg, respectively for x= 1.25,1.30,1.35,1.40. The latent heat decreases with the decrease of phase transition temperature.

关 键 词：差示扫描量热法 过渡金属化合物 比热容 

分 类 号：O482.54[一般工业技术—材料科学与工程]