Microwave synthesis and sintering of Ba(Mg1/3Ta2/3)O3

B. Vaidhyanathan; D. K. Agrawal; T. R. Shrout; Yi Fang

doi:10.1016/S0167-577X(99)00185-8

Microwave synthesis and sintering of Ba(Mg_1/3Ta_2/3)O₃

B. Vaidhyanathan, D. K. Agrawal, T. R. Shrout, Yi Fang

Materials Research Institute (MRI)

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

Ba(Mg_1/3Ta_2/3)O₃, BMT, was synthesized and sintered by microwave processing at 2.45 GHz. Appropriate amounts of BaCO₃, MgO, and non-stoichiometric Ta₂O_5-x were used as starting materials for the synthesis. BMT was obtained by heating the precursors in a multimode microwave cavity of 2 kW between 900 °C and 1300 °C for just 20 min. The synthesis was carried out in N₂ atmosphere to prevent the oxidation of Ta₂O_5-x. The perovskite BMT starts forming at 900 °C and becomes single phase material at 1300 °C. The sintering of BMT was carried out in a single mode microwave cavity for 5 to 30 min at 1400 °C to 1600 °C without using any sintering aid. A relative density of 97% was obtained in 30 min of microwave sintering at 1600 °C. In contrast, it was found that to achieve the same densification, it requires 6 h of soaking at the same temperature in conventional sintering process.

Original language	English (US)
Pages (from-to)	207-211
Number of pages	5
Journal	Materials Letters
Volume	42
Issue number	3
DOIs	https://doi.org/10.1016/S0167-577X(99)00185-8
State	Published - Jan 2000

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Microwave synthesis and sintering of Ba(Mg1/3Ta2/3)O3",

abstract = "Ba(Mg1/3Ta2/3)O3, BMT, was synthesized and sintered by microwave processing at 2.45 GHz. Appropriate amounts of BaCO3, MgO, and non-stoichiometric Ta2O5-x were used as starting materials for the synthesis. BMT was obtained by heating the precursors in a multimode microwave cavity of 2 kW between 900 °C and 1300 °C for just 20 min. The synthesis was carried out in N2 atmosphere to prevent the oxidation of Ta2O5-x. The perovskite BMT starts forming at 900 °C and becomes single phase material at 1300 °C. The sintering of BMT was carried out in a single mode microwave cavity for 5 to 30 min at 1400 °C to 1600 °C without using any sintering aid. A relative density of 97% was obtained in 30 min of microwave sintering at 1600 °C. In contrast, it was found that to achieve the same densification, it requires 6 h of soaking at the same temperature in conventional sintering process.",

author = "B. Vaidhyanathan and Agrawal, {D. K.} and Shrout, {T. R.} and Yi Fang",

note = "Funding Information: This work is partially supported by the Center for Remote Sensing, Washington.",

year = "2000",

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doi = "10.1016/S0167-577X(99)00185-8",

language = "English (US)",

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T1 - Microwave synthesis and sintering of Ba(Mg1/3Ta2/3)O3

AU - Vaidhyanathan, B.

AU - Agrawal, D. K.

AU - Shrout, T. R.

AU - Fang, Yi

N1 - Funding Information: This work is partially supported by the Center for Remote Sensing, Washington.

PY - 2000/1

Y1 - 2000/1

N2 - Ba(Mg1/3Ta2/3)O3, BMT, was synthesized and sintered by microwave processing at 2.45 GHz. Appropriate amounts of BaCO3, MgO, and non-stoichiometric Ta2O5-x were used as starting materials for the synthesis. BMT was obtained by heating the precursors in a multimode microwave cavity of 2 kW between 900 °C and 1300 °C for just 20 min. The synthesis was carried out in N2 atmosphere to prevent the oxidation of Ta2O5-x. The perovskite BMT starts forming at 900 °C and becomes single phase material at 1300 °C. The sintering of BMT was carried out in a single mode microwave cavity for 5 to 30 min at 1400 °C to 1600 °C without using any sintering aid. A relative density of 97% was obtained in 30 min of microwave sintering at 1600 °C. In contrast, it was found that to achieve the same densification, it requires 6 h of soaking at the same temperature in conventional sintering process.

AB - Ba(Mg1/3Ta2/3)O3, BMT, was synthesized and sintered by microwave processing at 2.45 GHz. Appropriate amounts of BaCO3, MgO, and non-stoichiometric Ta2O5-x were used as starting materials for the synthesis. BMT was obtained by heating the precursors in a multimode microwave cavity of 2 kW between 900 °C and 1300 °C for just 20 min. The synthesis was carried out in N2 atmosphere to prevent the oxidation of Ta2O5-x. The perovskite BMT starts forming at 900 °C and becomes single phase material at 1300 °C. The sintering of BMT was carried out in a single mode microwave cavity for 5 to 30 min at 1400 °C to 1600 °C without using any sintering aid. A relative density of 97% was obtained in 30 min of microwave sintering at 1600 °C. In contrast, it was found that to achieve the same densification, it requires 6 h of soaking at the same temperature in conventional sintering process.

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DO - 10.1016/S0167-577X(99)00185-8

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JO - Materials Letters

JF - Materials Letters

IS - 3

ER -

Microwave synthesis and sintering of Ba(Mg_1/3Ta_2/3)O₃

Abstract

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