Powder Synthesis of SrTiO sub 3 Boundary Layer Capacitor Materials

摘要

Powders with controlled agglomerate structure were synthesized from a solution of strontium nitrate and titanium citrate to produce strontium titanate boundary layer capacitors (STBLCs). A unique citrate formation ultrasonically generated aerosol/freeze dry (CUGAFD) technique spatially froze chemical constituents and produced weakly agglomerated strontium titanate powders. Spherical particles, 20 to 300 micrometers in diameter, were generated. Controlled calcination resulted in particles that retained the spherical morphology and were comprised of 500 A strontium titanate crystallites. Strontium titanate surface boundary layer capacitors were fabricated by firing at 1450 deg C in hydrogen and reoxidizing at 1000 deg C in air. 11 refs., 4 figs. (ERA citation 13:018700)