Characterization and Sintering of LaAlO3 Powder Prepared by the Hydrazine Method.

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  • Hirota Ken
    Department of Molcular Science and Technology, Faculty fo Engineering, Doshisha University
  • Iketani Kazuya
    Department of Molcular Science and Technology, Faculty fo Engineering, Doshisha University
  • Yoshinaka Masaru
    Department of Molcular Science and Technology, Faculty fo Engineering, Doshisha University
  • Yamaguchi Osamu
    Department of Molcular Science and Technology, Faculty fo Engineering, Doshisha University

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Lanthanum aluminum oxide LaAlO3 is formed at low temperatures (-870°C) from an amorphous material prepared by the hydrazine method. Powder characterization has been conducted using XRD, DTAITG, TEM, and BET method; LaAlO3 powders heated at 900°-1500°Crevealed that they consisted of submicrometer-sized translucent particles. They were sintered at 1800°C for 2h in air, dense ceramics with a 96.4% of theoretical have been obtained from the powder calcined at 1200°C. They exhibit the microstructure composed of well-developed grains (-140μm) with intergranular and intragranular pores of-13 and-7μm, respectively. Electric property has been evaluated; their dielectric constant at room temperature is 36.5±1.

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