基于组合薄膜制备技术的成分梯度薄膜(La1-xCax)VO3（0≤x≤1）的制备和热电性能研究

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基于组合薄膜制备技术的成分梯度薄膜(La_1-xCa_x)VO₃（0≤x≤1）的制备和热电性能研究

基金项目:

博士后基金(No.2005037230)。

国家自然基金(No.50674033)

1. Key Laboratory for electromagnetic processing of Materials, Northeastern University, Shenyang 110004, China;
2. Delegation Office, of PLA in Anshan Steel, Ansan 114000, China

摘要: 采用“组合激光溅射制膜技术”,制备了高质量(La_1-xCa_x)VO₃(0≤x≤1)成分梯度薄膜。采用组合热电测量系统和组合XRD系统测量了(La_1-xCa_x)VO₃(0≤x≤1)成分梯度薄膜的热电性能和晶体结构。在0≤x≤1范围内,(La_1-xCa_x)VO₃形成了固溶体。800℃生长的LaVO₃薄膜具有最大的功率因数(α)值0.6μW/cm K²。V离子化学价对LaVO₃的热电性能影响很大,当它由+3向+2变化时,可能获得良好的热电性能。
- 成分梯度薄膜 /
- 热电 /
- 钒氧化物 /
- 组合激光溅射沉积技术
Abstract: La_1-xCaxVO₃ composition-spread films were fabricated by combinatorial pulsed laser deposition and their thermoelectric properties were evaluated paralelly by the multi-channel thermoelectric measurement system.Concurrent X-ray analysis verified the formation of solid soluted films in the full composition range(0≤x≤1) as judged from the linear variation of the lattice constants.The power coefficient of 0.6 μW/cm K2 was achieved in LaVO₃ film at 800℃.Large TE properties in vanadium oxide system can be expected with the change of vanadium ion valence from 3+ to 2+.
- Composition-spread film /
- Thermoelectric /
- Vanadium oxide /
- Combinatorial Pulsed laser deposition