Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/107090
Title: Lead zirconate titanate via reaction sintering of hydroxide precursors
Authors: Junmin, X. 
Wang, J. 
Issue Date: Apr-1999
Citation: Junmin, X.,Wang, J. (1999-04). Lead zirconate titanate via reaction sintering of hydroxide precursors. Journal of Materials Research 14 (4) : 1503-1509. ScholarBank@NUS Repository.
Abstract: Lead zirconate titanate (PZT) has been successfully fabricated via a unique one-step sintering processing route, which is simpler than the traditional precursor-calcination-milling-pelleting-sintering route and is able to deliver an enhanced sintered density at a much reduced sintering temperature. The hydroxide precursor was prepared by coprecipitation from a mixed nitrate solution containing Pb2+, Zr4+, and Ti4+ ions, and it was then compacted into pellets without being calcined at a low temperature. The precursor pellets were dehydrated at 400, 500, and 600°C for 4 h, respectively, followed by an isostatic pressing at 350 MPa, prior to being sintered at a high temperature. Dehydration temperature has a large impact on the sintering behavior of these hydroxide-derived PZT ceramics. The PZT dehydrated at 400°C was seriously cracked when sintered at temperatures ranging from 950 to 1150°C, due to the incomplete dehydration. A sintered density of 99.2% theoretical density was obtained at 1050°C for 2 h for the powder pellet dehydrated at 500°C for 4 h. It exhibits a dielectric constant of 1024 and a dielectric loss of 2.1% at a frequency of 1 kHz at room temperature. A calcination at a too-high temperature, e.g., 600°C, results in a reduction in the sinterability of the precipitate-derived PZT ceramic.
Source Title: Journal of Materials Research
URI: http://scholarbank.nus.edu.sg/handle/10635/107090
ISSN: 08842914
Appears in Collections:Staff Publications

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