In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 36, No. 6R ( 1997-06-01), p. 3548-
Abstract:
Densification and grain growth development in CuO–BaO mixture doped BaTiO 3 have been studied on the effect of the ratio of CuO–BaO mixtures (molar ratio, CuO/BaO=1, 2, and 2.5). Grain growth for BaTiO 3 with 1 wt% CuO–BaO mixtures addition is studied for sintering from 950° C to 1250° C in air. The average grain size of BaTiO 3 ceramics is the functions of sintering temperature, sintering time, and CuO/BaO ratio. The results are discussed in terms of the kinetic growth equation: G n = K 0 t exp
(- Q / R T ). The grain growth exponents decrease with the increasing of CuO/BaO ratio and sintering temperature. For BaTiO 3 fluxed with CuO/BaO=1, 2, and 2.5, the average grain-growth exponents are determined to be 5.3, 5, and 4.3 and the activation energies are estimated to be 290±60, 314±40, and 348±19 kJ/mol, respectively. The molar ratio of CuO–BaO mixture will affect the average grain size, grain growth kinetic exponent, and activation energy of BaTiO 3 ceramics.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.36.3548
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1997
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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