以La2O3、Cr2O3和Li2CO3为原料,用固相法合成的LaCr(1.05-x)LixO3(x=0.05,0.1)作为样品,通过测量其热膨胀系数及TG-DSC等分析手段研究了Li及含量的大小对材料热膨胀系数的影响.结果表明,Li的添加能显著改变材料的热膨胀性能,可以达到7×10-6K-1~8×10-6K-1左右.但过多Li的添加反而不能达到改善材料热膨胀系数的目的.
参考文献
[1] | Yasuda I;Hikita T .Electrial conductivity and defect structure of cacium-doped lanthanum chromites[J].Journal of the Electrochemical Society,1993,140(06):1699-1704. |
[2] | Yong jie Y;Tian lian W;Heng yong T et al.Charateristics of lanthanum strontium chromite prepared by glycine nitrate process[J].Solid State Ionics,2000,135:475-479. |
[3] | Suda E.;Pacaud B.;Seguelong T.;Takeda Y. .Sintering characteristics and thermal expansion behavior of Li-doped lanthanum chromite perovskites depending upon preparation method and Sr doping[J].Solid state ionics,2002(1/4):335-341. |
[4] | 孙良成,李德辉,李胜利,付贵福,敖青,周天亮.铬酸镧材料热膨胀机理研究现状[J].工业加热,2004(03):27-31. |
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