In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 39, No. 8R ( 2000-08-01), p. 4835-
Abstract:
(Ba 0.6 Sr 0.3 Ca 0.1 )TiO 3 (BSCT) powders, which were prepared by the sol–gel method using a solution of Ba, Sr and Ca acetate and Ti isopropoxide, were spray-dried under the optimum conditions of a 10000 rpm atomizer speed and 1.5 wt% polyvinyl alcohol (PVA) addition. BSCT ceramics, undoped and doped with MnCO 3 (0.1 mol%) and Y 2 O 3 (0–0.9 mol%), were fabricated by the cold isostatic press method, and then the structural and electrical properties as a function of the Y 2 O 3 -dopant amount were studied. The specimen, doped with more than 0.5 mol% Y 2 O 3 , showed small and uniform grains of 1–3 µm in diameter. The Curie temperature and the maximum dielectric constant decreased with increasing Y 2 O 3 content and the dielectric loss of the specimen, doped with 0.5 mol% Y 2 O 3 , showed a minimum value of 0.009 at the Curie temperature. The pyroelectric coefficient decreased as the dopant of Y 2 O 3 increased and the doped specimen of 0.3 mol% Y 2 O 3 showed a good value of 354 ×10 -9 C/cm 2 K under a 4 kV/cm DC bias field. The figure of merit F.M.D * for specific detectivity (D * ) of the specimen, doped with 0.5 mol% Y 2 O 3 , showed the highest value of 8.9 ×10 -9 Ccm/J.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.39.4835
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2000
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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