Sintering, Microstructure and Mechanical Properties of Ba2HoWO5.5 Ceramics

Camila M. Lapa; Ricardo Arthur Sanguinetti Ferreira; J. Albino Aguiar; Charles L. da Silva; Dulcina P.F. Souza; Yogendra Prasad Yadava

doi:10.4028/www.scientific.net/MSF.498-499.529

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HomeMaterials Science ForumMaterials Science Forum Vols. 498-499Sintering, Microstructure and Mechanical...

Sintering, Microstructure and Mechanical Properties of Ba₂HoWO_5.5 Ceramics

Abstract:

In high technology industries ceramics have several uses, especially at high temperature, e.g. inert crucibles, electrodes and catalysts. We are working on production and development of new oxide ceramics, based on complex cubic perovskite structure, for fabrication of crucibles for metallurgical applications. In the present work, we have produced and studied sintering behavior of a new ordered complex cubic perovskite oxide ceramic Ba2HoWO5.5. Microstructural characteristics of the Ba2HoWO5.5, sintered between 1200 to 1400°C for 48h, were studied by scanning electron microscopy. The mechanical behavior was studied by Vickers microhardness tests. Our studies show a gradual improvement in microstructural characteristics of sintered Ba2HoWO5.5, both on polished and fractured surface. This homogeneity of grain sizes and particle size distribution increases with the increasing of the sintering temperature, which results in higher sintered density and increased mechanical hardness.

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Materials Science Forum (Volumes 498-499)

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529-534

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.498-499.529

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Online since:

November 2005

Authors:

Camila M. Lapa, Ricardo Arthur Sanguinetti Ferreira, J. Albino Aguiar, Charles L. da Silva, Dulcina P.F. Souza, Yogendra Prasad Yadava

Keywords:

Ba₂HoWO_5.5, Microstructure, Oxide Ceramics, Sintering, Vickers Microhardness

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