Ceramic ferroelectric composite material-BSTO-ZnO
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United States of America Patent
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Jun 3, 1997
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app pub date -
Sep 11, 1995
filing date -
Sep 11, 1995
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Abstract
A novel ceramic ferroelectric material having a high dielectric constant, aow loss tangent, a low threshold voltage, a high nonlinear voltage exponent and a high tunability. The material is a composite comprising Barium Strontium Titanate (BSTO) and zinc oxide (ZnO). The preferred composite is represented by Ba.sub.1-x Sr.sub.x TiO.sub.3 --ZnO, wherein x is greater than 0.00, but less than or equal to 0.75, and wherein the percent weight ratio between BSTO and ZnO ranges from approximately 99%-50% and 1%-50% respectively. The novel materials possess superior electronic properties, and they may be employed in multilayer capacitors, capacitor-varistors, non-volatile computer memory or phased array antenna systems.
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