7.1: Invited Paper: Characteristics of Pure MgO Powders Added to an MgO Film

Pure MgO powders were synthesized using wet chemical and thermal processes. Purity and crystallinity were used as indicators determining the synthesis. From this, we obtained highly pure and crystalline MgO powders. Using these powders, we could achieve 15∼20V lower firing voltage and 10∼15% higher efficiency, depending on the extent of the partly covered area and on sealing temperature. The improvement was proved to be due to surface states that were absent in an MgO film.