Synthesis and physicochemical properties of a solid oxide nanocomposite based on a ZrO_{lass="a-plus-plus">2}–Y_{lass="a-plus-plus">2}O_{lass="a-plus-plus">3}–Gd_{lass="a-plus-plus">2}O_{lass="a-plus-plus">3}–MgO system

详细信息    查看全文

• 作者：M. V. Kalinina ; L. V. Morozova ; T. L. Egorova…
• 关键词：zirconium dioxide ; nanocrystalline ceramics ; coprecipitation of hydroxides ; electrical conductance ; solid electrolyte ; fuel cell
• 刊名：Glass Physics and Chemistry
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：42
• 期：5
• 页码：505-511
• 全文大小：424 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Ceramics,Glass,Composites,Natural Materials
  Characterization and Evaluation Materials
  Materials Science
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-313X
• 卷排序：42

文摘

A highly dispersive powder with a (ZrO₂)_0.92(Y₂O₃)_0.03(Gd₂O₃)_0.03(MgO)_0.02 composition and specific surface area of 150 m2/g has been synthesized via a method of coprecipitation of hydroxides with the subsequent cryochemical treatment of the gel. Nanoceramics based on the cubic modification of zirconium dioxide with the grain size of ~40–45 nm have been obtained. The temperature dependence of the specific electrical conductance of the nanoceramics within a temperature range of 350–870°C in air has been studied, and the ratio of the ionic and electronic parts of the conductance has been determined. Recommendations for the use of the obtained oxide nanocomposite as an electrolyte for a high-temperature fuel cell have been given.