Preparation of Zn3Nb2O8 by Chemical Co-Precipitation

Yao Min Ding; Jian Qing Dai; Jing Bing Xia; Wen Guo Chen; Zhi Gang Hu

doi:10.4028/www.scientific.net/AMR.412.90

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Preparation of Zn₃Nb₂O₈ by Chemical Co-Precipitation

Abstract:

Fine powder of Zn₃Nb₂O₈ was prepared by chemical co-precipitation using KOH, Nb₂O₅ and ZnSO₄·7H₂O as raw materials. Laser particle analyzer was used to investigate the precursor. It showed that the average size (D50) was 3.13μm, and the particle distribution ranged from 1.82µm to 4.47µm. TG-DTA and XRD showed that, the precursor yielded Zn₃Nb₂O₈ ceramics by calcined at 850°C, which was much lower than 1100°C, at which Zn₃Nb₂O₈ ceramics could be obtained by traditional solid state method. The sintering of as-obtained powers with Cuo-Bi₂O₃-V₂O₅ sintering aids results in producing Zn₃Nb₂O₈ ceramics with s density 94.20% of the theoretical, and a product up to 19.83 (at 30MHz) at sintering temperature 950°C.