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孙远,瞿志学,冯航航,刘钊岑.Gd3+掺杂La2Mo2O9的相稳定性及热导率研究[J].稀有金属材料与工程(英文),2020,49(2):545~549.[Sun Yuan,Qu Zhixue,Feng Hanghang and Liu Zhaocen.Phase stability and thermal conductivity of Gd3+ doped La2Mo2O9[J].Rare Metal Materials and Engineering,2020,49(2):545~549.]
Phase stability and thermal conductivity of Gd3+ doped La2Mo2O9
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Received:March 15, 2019  Revised:April 23, 2019
DOI:
Key words: La2-xGdxMo2O9  Phase transition  Thermal conductivity
Foundation item:北京市自然科学基金(2182007);北京市属高校高水平教师队伍建设支持计划青年拔尖人才培育计划(CIT&TCD201704031)
Author NameAffiliation
Sun Yuan,Qu Zhixue,Feng Hanghang and Liu Zhaocen  
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Abstract:
      La2Mo2O9 is expected to have an extremely low thermal conductivity. However, the α-β phase transition at 580 oC seriously affects its performance and applications. In this work, the effect of Gd3+ doping on the phase stability and thermal conductivity was investigated. The results show that the phase transition of La2Mo2O9 is effectively suppressed with the doping of Gd3+ ions. The samples show a β-phase when x ≥ 0.2. Moreover, the thermal conductivity decreases firstly and then increases with the increase of doping content of Gd3+ ions with a minimum value at x = 0.2 at room temperature. The thermal conductivities of all samples are below 1 W/(m.K).