Oriented Barium Titanate Ceramics Made from Fiber State Powder

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J. Korean Ceram. Soc. > Volume 30(12); 1993 > Article

Journal of the Korean Ceramic Society 1993;30(12): 1066.

섬유상 분말로 제조된 배향성을 가진 $BaTiO_3$ 세라믹

서용교, 야나기다히로아끼¹

삼성코닝 연구소
¹동경대학 공학계연구과

Oriented Barium Titanate Ceramics Made from Fiber State Powder

ABSTRACT

When looked upon as a polycrystalline, ceramics have two basic differences from a single crystal. One is that there exist grain boundaries, the other is that the crystal axes of each small crystal are arranged in random directions. But the crystal axes fo small crystals which compose ceramics may be made to have the tendency of being arranged in a specific direction. This is called that the crystal axes are oriented. The degree of the direction arrangement of the crystal axes is called orientation. In order to orient the crystal axes effectively, the fiberous barium titanates were made through KDC method and the ion exchange method. And then they were arranged through pressing, doctor blade, and syringe. As the result of Lotgering evaluation, the sample oriented through syringe showed the highest orientation. After sintering, though the most particles that had been fiberous shaped became global shape viewed through SEM, the orientation of the crystals was reinforced by means of sintering.