In:
Journal of the American Ceramic Society, Wiley, Vol. 96, No. 10 ( 2013-10), p. 3046-3049
Abstract:
Ce ‐doped BaTiO 3 ‐based ceramics were prepared and studied to satisfy ultra‐broad temperature stability (from −55°C to 300°C, capacitance variation rate based on C 20°C is within ±15%). The sample with 0.6 mol% CeO 2 succeeds to achieve this performance with a remarkably high ceiling temperature of 300°C. Meanwhile, the sample has good dielectric and electrical properties at room temperature (ε r = 1667, tanδ = 1.478%, ρ V = 5.9 × 10 12 Ω·cm). Ce ion can substitute for Ti ion as Ce 4+ or Ba ion as Ce 3+ . The substitution decreases the spontaneous polarization of BaTiO 3 , and then weakens the ferroelectricity of BaTiO 3 . As a result, the temperature stability of samples is improved obviously. Besides, CeO 2 addition promotes the formation of exaggerated grains, which are consisting of Ba 6 Ti 17 O 40 .
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.2013.96.issue-10
Language:
English
Publisher:
Wiley
Publication Date:
2013
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
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