TY - JOUR
T1 - Densification and phase formation in seeded, reactively sintered Sr0.53Ba0.47Nb2O6 ceramics
AU - Duran, C.
AU - Messing, G. L.
AU - Trolier-McKinstry, S.
N1 - Funding Information:
This work was supported by ONR Grant N00014-98-1-0527. Cihangir Duran gratefully acknowledges the support of the Gebze Institute of Technology (Turkey) for his Ph.D. study in the USA.
PY - 2002/12/1
Y1 - 2002/12/1
N2 - Sr0.53Ba0.47Nb2O6 (SBN53) ceramics were reactively sintered from SrNb2O6 and BaNb2O6 powders. The formation temperature decreased from 1260°C for unseeded samples to 1130°C for the samples with 15.4 wt% seeds plus 0.85 mol% V2O5 at a heating rate of 4°C/min. For the V2O5-free samples, the activation energy was lowered from 554 ± 15 kJ/mol for unseeded samples to 241 ± 17 kJ/mol for the samples with 15.4 wt% seeds. In the V2O5-containing samples, densification and phase formation occurred simultaneously. In the V2O5-free samples, however, phase formation was completed before densification. In both cases, ceramics with ≥95% relative density were obtained. In all cases, SBN53 formed directly, rather than via a variety of intermediate SBN solid solutions. The microstructure evolution was also studied.
AB - Sr0.53Ba0.47Nb2O6 (SBN53) ceramics were reactively sintered from SrNb2O6 and BaNb2O6 powders. The formation temperature decreased from 1260°C for unseeded samples to 1130°C for the samples with 15.4 wt% seeds plus 0.85 mol% V2O5 at a heating rate of 4°C/min. For the V2O5-free samples, the activation energy was lowered from 554 ± 15 kJ/mol for unseeded samples to 241 ± 17 kJ/mol for the samples with 15.4 wt% seeds. In the V2O5-containing samples, densification and phase formation occurred simultaneously. In the V2O5-free samples, however, phase formation was completed before densification. In both cases, ceramics with ≥95% relative density were obtained. In all cases, SBN53 formed directly, rather than via a variety of intermediate SBN solid solutions. The microstructure evolution was also studied.
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U2 - 10.1023/A:1021039716226
DO - 10.1023/A:1021039716226
M3 - Article
AN - SCOPUS:0036955116
SN - 0022-2461
VL - 37
SP - 5041
EP - 5049
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 23
ER -