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Title: Ba(Zn 1/3 Nb 2/3 )O 3 Ceramics Synthesized by Spray Pyrolysis Technique
Authors: Mei-Hui Liang;Chen-Ti Hu;Horng-Yi Chang;I-Nan Lin
Contributors: 國立臺灣海洋大學:輪機工程學系
Keywords: microwave dielectrics;Ba(Zn1/3Nb2/3)O3;spray-pyrolysis
Date: 2011-03-09
Issue Date: 2017-01-18T07:54:47Z
Publisher: Ferroelectrics
Abstract: Abstract:Ba(Zn1/3Nb2/3)O3(BZN) powder has been prepared by pyrolyzing the polyester precursors, followed by heat treated at 800°C for 4 hrs in air to remove the residual organic materials. The as prepared powders are of hollow geometrical spheres, which inherit the morphology of the atomized droplets. The perovsike structure is indicated by X-ray diffraction pattern to have already formed. A second phase, identified as Ba5Nb4O15, is observed among the pellets sintered at 1250°C∼1350°C in open air, which is ascribed to the loss of ZnO. When the pellets were packed with ZnO powders and placed in a covered Al2O3crucibles, pure perovsike, free of Ba5Nb4O15 phase, was obtained when sintered at 1300°C. Q·f value as high as 180,000 GHz was achieved for thus obtained BZN.
Relation: 231(1-4), pp.243-248
Appears in Collections:[Department of Marine Engineering] Periodical Articles

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