Low-Temperature Preparation and Size Effect of Strontium Barium Niobate Ultrafine Powder

Sheng Guo Lu; Chee Leung Mak; Kin Hung Wong

doi:10.1111/j.1151-2916.2001.tb00611.x

Low-Temperature Preparation and Size Effect of Strontium Barium Niobate Ultrafine Powder

Sheng Guo Lu, Chee Leung Mak, Kin Hung Wong

Research output: Journal article publication › Journal article › Academic research › peer-review

34 Citations (Scopus)

Abstract

Ultrafine strontium barium niobate ((SrxBa1-x)Nb2O6, SBN) powders were prepared using sol-gel and hydrolysis aging processes. Their structural properties were examined via X-ray diffractometry and Raman spectroscopy. Our results indicated that the SBN powders crystallize to a pure tetragonal phase at annealing temperatures as low as 700 °C. The crystal-lite size of SBN powders subjected to different thermal treatments was in the range of several tens of nanometers. Differential scanning calorimetry revealed that the heat flow had a broadened peak. The transition temperature from the ferro-electric phase to the paraelectric phase and the relative dielectric constant of the SBN50 powder were less than the corresponding values of the bulk ceramic and the single crystal.

Original language	English
Pages (from-to)	79-84
Number of pages	6
Journal	Journal of the American Ceramic Society
Volume	84
Issue number	1
DOIs	https://doi.org/10.1111/j.1151-2916.2001.tb00611.x
Publication status	Published - 1 Jan 2001

ASJC Scopus subject areas

Ceramics and Composites
Geology
Geochemistry and Petrology
Materials Chemistry

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10.1111/j.1151-2916.2001.tb00611.x

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AU - Mak, Chee Leung

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N2 - Ultrafine strontium barium niobate ((SrxBa1-x)Nb2O6, SBN) powders were prepared using sol-gel and hydrolysis aging processes. Their structural properties were examined via X-ray diffractometry and Raman spectroscopy. Our results indicated that the SBN powders crystallize to a pure tetragonal phase at annealing temperatures as low as 700 °C. The crystal-lite size of SBN powders subjected to different thermal treatments was in the range of several tens of nanometers. Differential scanning calorimetry revealed that the heat flow had a broadened peak. The transition temperature from the ferro-electric phase to the paraelectric phase and the relative dielectric constant of the SBN50 powder were less than the corresponding values of the bulk ceramic and the single crystal.

AB - Ultrafine strontium barium niobate ((SrxBa1-x)Nb2O6, SBN) powders were prepared using sol-gel and hydrolysis aging processes. Their structural properties were examined via X-ray diffractometry and Raman spectroscopy. Our results indicated that the SBN powders crystallize to a pure tetragonal phase at annealing temperatures as low as 700 °C. The crystal-lite size of SBN powders subjected to different thermal treatments was in the range of several tens of nanometers. Differential scanning calorimetry revealed that the heat flow had a broadened peak. The transition temperature from the ferro-electric phase to the paraelectric phase and the relative dielectric constant of the SBN50 powder were less than the corresponding values of the bulk ceramic and the single crystal.

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Low-Temperature Preparation and Size Effect of Strontium Barium Niobate Ultrafine Powder

Abstract

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