Sintering of Submicron Powders Prepared by Ball Milling

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Abstract
The calcined powders of PLZT 2/50/50 and low temperature sinterable dielectric ceramics were ball milled for a maximum of 240 h using small zirconia balls of 1 mm and 3 mm in diameter. The powders were ground down to 0.2 µm in average particle size. The sintering temperature could be lowered 100∼200°C by making the particle size of powders very fine. Furthermore, the combination of the fine powder and the liquidus sintering aid was able to make the sintering temperature low additionally. Dielectric and piezoelectric properties of the ceramics fabricated at relatively low temperature from the fine powders are compared with those of the ceramics fabricated from the usual powders.

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