高密度・微粒子マンガン亜鉛フェライトとランタン置換チタン酸ジルコン酸鉛セラミックス(高圧力小特集)

概要

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Dense manganese zinc ferrites (MnZn ferrites) and lead lanthanum zirconate titanate (PLZT) with fine grains were fabricated by post-hot isostatic pressing (HIP) technique finely ground starting powders prepared by a media agitation milling method. The average particle size of MnZn ferrites milled by media agitation milling was 0.03μm, and the average grain size of the HIP'ed body was 1.2μm. The ferrites showed low power-loss at high frequencies and initial permeability of 500 at 10MHz. HIPing treatment of PLZT ceramics improved the transmittance without significant increase in grain size. The optical transmittance and grain size of HIP'es PLZT were 69% at the wavelength of 750 nm and 2μm, respectively. PLZT with fine grains showed microscopically uniform birefringence. At the wavelength below 500 nm, the transmittance of Ar-HIP'ed PLZT was higher than that of O_2-HIP'ed PLZT. The highly transparent PLZT is feasible for the fabrication of optical shutter arrays having high dimensional accuracy and optical uniformity for electrophotography.
社団法人日本材料学会の論文
1994-09-15