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

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

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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.

Original languageEnglish (US)
Pages (from-to)207-211
Number of pages5
JournalMaterials Letters
Volume42
Issue number3
DOIs
StatePublished - Jan 2000

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Vaidhyanathan, B., Agrawal, D. K., Shrout, T. R., & Fang, Y. (2000). Microwave synthesis and sintering of Ba(Mg1/3Ta2/3)O3. Materials Letters, 42(3), 207-211. https://doi.org/10.1016/S0167-577X(99)00185-8