Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/107090
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dc.titleLead zirconate titanate via reaction sintering of hydroxide precursors
dc.contributor.authorJunmin, X.
dc.contributor.authorWang, J.
dc.date.accessioned2014-10-29T08:39:22Z
dc.date.available2014-10-29T08:39:22Z
dc.date.issued1999-04
dc.identifier.citationJunmin, 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.
dc.identifier.issn08842914
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/107090
dc.description.abstractLead 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.
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentMATERIALS SCIENCE
dc.description.sourcetitleJournal of Materials Research
dc.description.volume14
dc.description.issue4
dc.description.page1503-1509
dc.description.codenJMREE
dc.identifier.isiutNOT_IN_WOS
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