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利用固相合成法得到Nd2-xErxZr2O7(0≤x≤1.0)陶瓷材料,分别利用X射线衍射仪、扫描电子显微镜、激光导热仪对材料的晶体结构、显微形貌及热扩散系数进行表征,并对其热导率进行分析.结果表明,Nd2-xErx Zr2 O7晶体表现为立方相,获得稳定烧绿石结构Nd2-xErxxZr2O7陶瓷材料的x值应控制在0.8以内;Er3+对A位较大的Nd3+进行取代并固溶到了晶格中,使晶格参数减小;陶瓷的晶粒尺寸减小至1μm~3μm,Er3+具有抑制烧结的作用;室温至1000℃范围内,Er3+对Nd3+的取代掺杂可以有效降低陶瓷材料的热导率,1000℃时Nd1.4Er0.6Zr2O7热导率为1.76W·m-1 ·K-1.

Nd2-xErx Zr2O7 (0 ≤ x ≤ 1.0) ceramics were synthesized by solid phase synthesis method.The phase structure was analysed by XRD,the feature surface was observed by SEM,and the thermal diffusivities of ceramic materials were tested by laser-flash method respectively.The results show that Nd2-xErxZr2O7 exhibited cubic structures and the value of x should be less than 0.8 for stable pyroehlore.Er3 + substituted bigger Nd3 + located A-site in the lattice and dissolved in solid solution.With the growing of x,the grain size of ceramic decreased to 1 ~ 3 μm which indicated Er3 + have a inhibitory effect on ceramic sintering.From RT to 1000 ℃,the Er3+ subsitute of Nd3+ decreased the thermal conductivities of the ceramics and reached to 1.7 6w · m-1 · K-1 at 1000 ℃.

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