The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Microstructural Evolution and Dielectric Response Characteristics During Crystallization of Amorphous Pb(Fe2/3W1/3)O3

  • Kim, Nam-Kyung (Dept. of Inorg. Mator. Eng., Kyungpook Nat. Univ) ;
  • David A. Payne (Dept. of Mater. Sci. and Eng., and Mater, Research Laboratory Univ)
  • Published : 1995.06.01
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Abstract

Development of phases, evolution of microstructures, and dielectric response characteristics of amorphous lead iron tungstates during crystabllization were investiageted. A series of mircographs showing the evolution sequence of microstructures is presented. Crystallization was observed to initiate from inside of the amorphous material. A cubic perovskite phase developed fully at $760^{\circ}C$ from amorphous state via intermediate metastable crystalline structures. Dielectric constant of amorphous PFM was totally insensitive to the temperature change around the Curie temperature of crystalline material. Sintered pellet, with relative density of 96% and an almost pore-free dense internal microstructure, could be prepared from amorphous powder.

Keywords

References

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