Microwave sintering route was used for obtaining minimum chemical reactivity between the two phases (for sharp grain boundaries) and controlled microstructure in the composites of Ba1 - xSrxTiO3 (BST) and MgO. Composites of desirable compositions of ferroelectric BST and non-ferroelectric MgO were microwave sintered at a frequency of 2.45 GHz. Low dielectric constant, controlled microstructure, high relative density, and sharp grain boundary in BST:MgO composites were achieved. The depressed dielectric constant and tangent loss, high tunability and K-factor values are measured in the sintered composites. This paper describes the detailed studies on the microwave sintered BST:MgO composites and their tunable dielectric properties and microstructure development.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics