Hot isostatic press sintering and dielectric properties of SrTaO2N ceramics

SrTaO2N prepared by a citrate route was capsule hot isostatic press sintered at 196MPa for 3h at 1200, 1400 and 1600°C. Densification over 80% was attained for all the sintered bodies with partial reduction, which was observed as a change of color from brown to dark gray. Exaggerated grain growth wa...

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Bibliographic Details
Published in:Ceramics international 2013-04, Vol.39 (3), p.3377-3380
Main Authors: Zhang, Y.-R., Masubuchi, Y., Motohashi, T., Kikkawa, S., Hirota, K.
Format: Article
Language:English
Subjects:
Annealing
Ceramics
Color
Colour
Dielectric
Dielectric properties
Hot isostatic pressing
Oxynitride
Perovskite
Presses
Reduction
Sintering
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Summary:SrTaO2N prepared by a citrate route was capsule hot isostatic press sintered at 196MPa for 3h at 1200, 1400 and 1600°C. Densification over 80% was attained for all the sintered bodies with partial reduction, which was observed as a change of color from brown to dark gray. Exaggerated grain growth was observed with some amount of open pore for the product sintered at 1400°C. The sample was successfully returned to the brown insulator color after annealing in ammonia flow at 1000°C. The resultant SrTaO2N ceramics exhibited a considerably high relative dielectric permittivity of 7.8×103 at 102Hz.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2012.08.063