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Abstract

Abstract:The preparation technique during synthesizing process and heat treatment plays an important role in the properties of the ceramic materials. In this paper, ceramic perovskite-type oxide based on Ba (Ce,Zr)O 3 was prepared by sol-gel method and sintered via two-step sintering (TSS) technique. In the TSS, the sintered pellet was undergoing twice heat treatment. The first temperature profile was set at T 1 = 1400°C and the second temperature were varied at T 2 = 1150°C, 1200°C, 1300°C and 1350°C, respectively. XRD results showed that all samples TSS1 to TSS5 exhibit single-phase of cerate-zirconate ceramics except for the pellet sintered at 1300°C (TSS4). The crystalline peaks for single-phase sintered pellets were matched to the standard compound Ba(Ce,Zr)O 3 . On the other hand, the presence of secondary phases of CeO 2 , Ba 2 ZrO 4 and BaCO 3 along with the main phase of Ba(Ce,Zr)O 3 were detected in TSS4. SEM analysis revealed that the samples formed clear and compact grains with submicron sizes whereby the size of grain decreased from 336.4 to 192 nm as the second sintering temperature increased. This paper attempts to show that the implementation of different sintering profile in TSS method was found to give significant effect on the phase and morphology of solid solution of Ba(Ce,Zr)O 3 .

Evaluation of the Potential of Barium Zirconate on the Sinterability and Properties of Bovine Hydroxyapatite

“…It is thought that this is related to the intermediate phases, namely: Ba 2 ZrO 4 , sigma-BaP 2 O 7 , Ba 3 P 2 O 8 and CaZrO 3 , formed between the BHA and BaZrO 3 particulates. As stated in Ref [73], Ba 2 ZrO 4 inhibits the grain growth in BaZrO 3 doped ceramics. Studies on barium-substituted hydroxyapatites (Ba-HAs) [74][75][76] have reported that sigma-BaP 2 O 7 and Ba 3 P 2 O 8 phases contribute to a grain size reduction in the HA matrix material.…”