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作 者:李良 陈玉奇 马世榜 柏长春 周爱国[4] LI Liang;CHEN Yuqi;MA Shibang;BAI Changchun;ZHOU Aiguo(School of Mechanical and Electrical Engineering, Nanyang Normal University, Nanyang 473061, China;School of Materials, Shanghai Dianji University, Shanghai 201306, China;Nanyang Quality and Technical Supervision, Inspection and Testing Center, Nanyang 473000, China;School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China)
机构地区:[1]南阳师范学院机电工程学院,河南南阳473061 [2]上海电机学院材料学院,上海201306 [3]南阳市质量技术监督检验测试中心,河南南阳473000 [4]河南理工大学材料学院,河南焦作454003
出 处:《南阳师范学院学报》2020年第6期24-27,共4页Journal of Nanyang Normal University
基 金:国家自然科学基金(51472075,51772077);河南省高校科技创新团队(19IRTSTHN027);河南省自然科学基金项目(202300410296);河南省留学回国人员择优资助(208007)和南阳师范学院博士专项(2019ZX018)。
摘 要:以TiH2做Ti源采用热压烧结制备钛铝碳(Ti3AlC2)并研究高温的电传输性能.以TiH2∶1.2Al∶2 TiC的摩尔配比在1450℃烧结60 min可以制备高纯的Ti3AlC2.利用差热分析研究TiH2做Ti源合成钛铝碳的反应机理,在烧结过程中TiH2脱氢反应所吸收的热量与Ti3AlC2的合成反应所释放的热量相互弥补,在1000℃左右Ti3AlC2合成反应的放热峰不明显.合成Ti3AlC2赛贝克系数介于10.8μV/K@323K到15.7μV/K@623K之间且远大于热等静压合成Ti3AlC2和Ti3SiC2的值.合成Ti3AlC2的电阻率因致密性差也偏高.In this paper,TiH 2 was used as Ti source to prepare titanium aluminum carbon(Ti 3AlC 2)by hot pressing sintering and to study the electrical transmission properties at high temperature.High purity Ti 3AlC 2 can be prepared with the mole ratio of TiH 2∶1.2Al∶2 TiC by sintered at 1450℃for 60min.The reaction mechanism for the synthesis of Ti 3AlC 2 from TiH 2 as Ti source was analyzed by differential thermal analysis.The heat absorbed by the dehydrogenation reaction of TiH 2 and the heat released by the synthesis reaction of Ti 3AlC 2 complement each other during sintering process.The exothermic peak of the synthesis reaction of Ti 3AlC 2 is not obvious at around 1000℃.The Seebeck coefficient of synthetic Ti 3AlC 2 is between 10.8μV/K@323K and 15.7μV/K@623K,which were far greater than the value of Ti 3AlC 2 and Ti 3SiC 2 synthesized by hot isostatic pressing.The resistivity of synthetic Ti 3AlC 2 is also high due to the poor compactness.
分 类 号:TQ134-11[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]
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