The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Preparation and Sintering Characteristics of Y-doped $SrZrO_3$ by Citrate Gel Method

  • Jeon, Yang-Seuk (School of Materials Science & Engineering, Hong-Ik University) ;
  • Sim, Soo-Man (School of Materials Science & Engineering, Hong-Ik University)
  • Published : 1999.09.01
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Abstract

Proten-conductive $SrZr_{0.95} Y_{0.05} O_{2.975}$ powder was prepared by citrate gel method its characteristics and sinterability were investigated. Amorphous gel could be obtained from a citric acid solution that $SrCO_3$ and metal nitrates were dissolved. The initial decomposition of the gel proceeded up to $250^{\circ}C$, followed by combustion of its decomposition products in the temperature range from $250^{\circ}C$ to $500^{\circ}C$. A well-crystallized perovskite phase with a stoichiometric composition after calcination at $1000^{\circ}C$. Sintering green compacts of this powder for 6 h showed a considerable densification to start at $1200^{\circ}C$ and resulted in 86.8% and 96.5% relative densities at $1400^{\circ}C$ and $1600^{\circ}C$, respectively. Whereas, the powder compacts prepared by solid state reaction had much lower relative densities, 73% at $1400^{\circ}C$ and 92% at $1600^{\circ}C$.

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