Fabrication of Transparent Y2Hf2O7 Ceramic from Combustion Synthesized Powders

doi:10.3724/SP.J.1077.2011.00929

Abstract

Abstract: Y(NO₃)₃, HfCl₄and EDTA as raw materials,Y₂Hf₂O₇ nanopowder were successfully prepared by combustion synthesis method. The as-burnt powder were calcined at 1200℃ and then ball-milled for 15h. The powders were formed into green bodies with a size of 20mm×2.5mm by cold isostatic pressing (CIP, 200MPa). Y₂Hf₂O₇ transparent ceramics were obtained by sintering the green bodies at 1850℃ in vacuum for 6h. The resultant ceramics showed a transmittance of 50% in the visible spectral region. The sintering behavior of the prepared Y₂Hf₂O₇ powders was investigated. When the sintering temperature was above 1850℃, sintering temperature had little effect on the transmittance of the ceramic. Meanwhile the grain size became larger with sintering temperature increasing.

Key words: combustion synthesis, Y₂Hf₂O₇, transparent ceramic, vacuum sintering

CLC Number:

TQ174

ZOU Xiao-Qing, ZHOU Guo-Hong, YI Hai-Lan, YANG Yan, WANG Shi-Wei. Fabrication of Transparent Y₂Hf₂O₇ Ceramic from Combustion Synthesized Powders[J]. Journal of Inorganic Materials, 2011, 26(9): 929-932.

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Fabrication of Transparent Y₂Hf₂O₇ Ceramic from Combustion Synthesized Powders

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