Ceramic ferroelectric composite material-BSTO-ZnO
AssigneeThe United States of America as represented by the Secretary of the Army
InventorLouise Sengupta
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Abstract
A novel ceramic ferroelectric material having a high dielectric constant, a ow 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.
Claims5
A ceramic Ferroelectric composite material BSTO-ZnO material consisting of;
- Barium Strontium Titanate, said barium Strontium Titanate represented as Ba.sub.1-x Sr.sub.x TiO.sub.3, wherein said x is greater than 0.0 but less than or equal to 0.75;
- and zinc oxide represented as ZnO;
- wherein the weight ratio of said Barium Strontium Titanate to zinc oxide ranges from approximately 99-50% wt. said Barium Strontium Titanate to approximmately 1%-50% wt. said zinc oxide.
Dependencies are inferred from the claim text.