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Synthesis of Dense Lead Titanate Ceramics with Submicrometer Grains by Spark Plasma Sintering
Author(s) -
Takeuchi Tomonari,
Tabuchi Mitsuharu,
Kondoh Isao,
Tamari Nobuyuki,
Kageyama Hiroyuki
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01231.x
Subject(s) - spark plasma sintering , materials science , ceramic , sintering , microstructure , lead titanate , grain size , composite material , plasma , dielectric , ferroelectricity , optoelectronics , physics , quantum mechanics
Dense PbTiO 3 ceramics consisting of submicrometer‐sized grains were prepared using the spark‐plasma‐sintering (SPS) method. Hydrothermally prepared PbTiO 3 (0.1 μm) was used as a starting powder. The powder was densified to ≳98% of the theoretical X‐ray density by the SPS process. The average grain size of the spark‐plasma‐sintered ceramics (SPS ceramics) was ≲1 μm, even after sintering at 900°–1100°C, because of the short sintering period (1–3 min). The measured permittivity of the SPS ceramics showed almost no frequency dependence over the range 10 1 –10 6 Hz, mainly because pores were absent from the ceramics. The coercive field of the SPS ceramics was somewhat higher than that of conventionally sintered ceramics, which could be attributed to the small‐grained microstructures of the SPS ceramics.