Mg_2(Si,Sn)热电固溶体微波合成研究  

Synthesis of Mg_2(Si,Sn)thermoelectricsolid solutions by microwave irradiation

作　　者：杜长坤[1] 周书才[1] 陈登明[1] 符春林[1] 

机构地区：[1]重庆科技学院冶金与材料工程学院,重庆401331

出　　处：《功能材料》2011年第S4期777-780,共4页Journal of Functional Materials

基　　金：重庆市自然科学基金资助项目(2009BB4228);重庆科技学院校内科研基金资助项目(CK2010Z09)

摘　　要：为了解决传统方法制备Mg2Si1-xSnx(0≤x≤1.0)固溶体过程中带来Mg的氧化、挥发等问题,引进微波低温合成法,成功合成了Mg2Si1-xSnx热电固溶体,用XRD及SEM分析手段对合成的块体物相和形貌进行了表征,并系统研究了合成工艺对Mg2Si1-xSnx压坯制备的影响及Mg2Si1-xSnx压坯在微波场中的加热特性。结果表明:Mg2Si1-xSnx压坯在微波场中的加热升温曲线与Mg2Si1-xSnx压坯密度有关,随密度越大,升温速率降低;XRD分析表明在微波辐射下Mg2Si1-xSnx形成了良好的固溶体。In order to reduce the oxidizing and volatilizing caused by Mg element in the traditional methods for synthesizing Mg2Si1-xSnx(0≤x≤1.0) solid solutions,Mg2Si1-xSnx solid solutions had been prepared by Microwave-assisted synthesis techniques.The heating behavior of Mg,Si and Sn fixed powder was investigated under microwave irradiation.X-ray diffraction(XRD)and SEM were used to characterize the powders.The results suggest that the temperature-rising rate is also dependent on the initial green density and higher green density provides lower heating rate while power setting are fixed.X-ray diffraction(XRD) patterns show that Mg2Si1-xSnx solid solutions have been well formed under microwave irradiation.

关 键 词：Mg2Si1-xSnx 固溶体 低温固相反应法 微波合成 

分 类 号：O614.22[理学—无机化学]