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Journal of Materials Science

, Volume 29, Issue 3, pp 778–785 | Cite as

BaZrO3 and BaHfO3: preparation, properties and compatibility with YBa2Cu3O7-x

  • J. L. Zhang
  • J. E. Evetts
Papers

Abstract

Single-phase BaZrO3 and BaHfO3 polycrystalline powders were prepared by solid-state reaction and by spray-drying methods. BaHfO3 ceramic was fabricated at 1300°C for 24 h after pre-sintering HfO2 and BaCO3 powders at 1040°C for 4 h. Homogeneous powders of BaZrO3 and BaHfO3 were also prepared by a spray-drying route. The interaction between YBa2Cu3O7-x (YBCO) and BaHfO3 and BaZrO3 was investigated in the temperature range 900–1060°C using heat-treatment cycles appropriate to composite reaction processing and melt-texturing. The results indicate that neither compound reacts significantly with YBCO at 950°C, and BaHfO3 is still unreactive up to 1000°C. Both of them are also very stable during the melting-texture process. BaHfO3 and BaZrO3 are thus very promising substrate materials and buffer layers for the deposition of thin and thick films and as container materials for bulk YBCO superconductors; BaHfO3 seems to be a more stable material than BaZrO3.

Keywords

Buffer Layer Thick Film Reaction Processing Substrate Material HfO2 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • J. L. Zhang
    • 1
  • J. E. Evetts
    • 1
  1. 1.Department of Materials Science and MetallurgyUniversity of CambridgeCambridgeUK

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