Novel ceramic ferroelectric material

Details Novel ceramic ferroelectric material Novel ceramic ferroelectric material

C - Chemistry, Metallurgy

04

B

C04B 35/465 (2006.01) C04B 35/117 (2006.01) C04B 35/49 (2006.01) H01Q 1/38 (2006.01) H01Q 3/36 (2006.01)

Patent

CA 2164595

A novel ceramic ferroelectric material having a low dielectric constant, low loss and high tunability. The material is a composite comprising Barium Strontium Titanate (BSTO) and a ceramic material having a low dielectric constant. The preferred composite is represented by Ba1-xSrxTiO3-Al2O3, wherein x is greater than 0.00, but less than or equal to 0.70, and wherein the percent weight ratio between Ba1-xSrxTiO3 and Al2O3 ranges from approximately 99 % - 40 % and 1 % - 60 %, respectively. The novel materials possess superior electronic properties; and they may be employed in various antenna systems.

L'invention concerne un nouveau matériau ferroélectrique céramique ayant une constante diélectrique faible, une perte faible et une accordabilité élevée. Le matériau est un matériau composite comprenant le titanate de baryum strontium (BSTO) et un matériau céramique à constante diélectrique faible. Le matériau composite préféré est représenté par la formule Ba1-xSrxTiO3-Al2O3 dans laquelle x est plus grand que 0,00, mais est inférieur ou égal à 0,70, et le rapport de poids en pourcentage entre Ba1-xSrxTiO3 et Al2O3 s'échelonne respectivement entre approximativement 99 % - 40 % et 1 % - 60 %. Ces nouveaux matériaux possèdent des propriétés électroniques supérieures et peuvent être employés dans divers systèmes d'antenne.

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