Effects of Forming Gas Annealing on Ba4Nb2O9 Ceramics

摘要：

Ba4Nb2O9 ceramics were synthesized via solid state reaction and sintered in air. Annealing in 5％H2 + 95％N2 at 900℃ for 2 h resulted in an increase in leakage current by several orders of magnitude, and obvious increases in low-frequency capacitance and dielectric loss, while re-oxidation in air at 900℃ for 2 h led to a partial recovery. It is proposed that oxygen vacancies and Nb4+ were formed through annealing in the reducing atmosphere while inverse process occurred in the re-oxidation treatment. Re-oxidation is helpful to improve the properties of barium niobates ceramics sintered or heat-treated in reducing atmospheres and further investigations are desirable.

关键词： Barium Niobate Dielectrics Hydrogen Annealing

作者: Yuan Meng Wan Ping Chen

作者单位: Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School ofPhysic Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physi

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 275-278

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）