期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 34, 期 16, 页码 4451-4455出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2014.07.003
关键词
SrTaO2N; Perovskite oxynitrides; Powder synthesis; Reaction mechanism; Dielectric properties
资金
- Japan Society for the Promotion of Science (JSPS) [24245039]
- Nanotechnology Platform Program of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
SrTaO2N powder was prepared by a novel reaction between Ta3N5 and SrCO3, instead of the traditional nitridation of SrTaO3.5. The phase evolution and reaction mechanism during the reaction were investigated. The mixed gas evolution of CO, CO2 and N-2 were observed in the heat-treatment of Ta3N5/SrCO3. The SrTaO2N product possessed an average particle size of 330 nm in a narrow distribution with the stoichiometric oxygen and nitrogen content. Its ceramics with various relative density were also fabricated by pressureless sintering of the as-prepared SrTaO2N powder, showing a high sinterability. The fully-annealed SrTaO2N bulks with a RD = 82.8% showed a relatively large dielectric constant and an improved dielectric loss. (C) 2014 Elsevier Ltd. All rights reserved.
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