Ceramic ferroelectric composite material - BSTO-MgO

Details Ceramic ferroelectric composite material - BSTO-MgO Ceramic ferroelectric composite material - BSTO-MgO

1994-03-07

1995-06-27

Jones, Deborah

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

501121, C04B 3546

Patent

active

054279887

ABSTRACT:
A novel ceramic ferroelectric material having a low dielectric constant, extremely 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 Ba.sub.1-x Sr.sub.x TiO.sub.3 --MgO, wherein x is greater than 0.00, but less than or equal to 0.75, and wherein the percent weight ratio between Ba.sub.1-x Sr.sub.x TiO.sub.3 and MgO 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 at both microwave and millimeter wave range frequencies.

REFERENCES:
patent: 4987107 (1991-01-01), Narumi et al.
patent: 4987108 (1991-01-01), Takagi et al.
patent: 5232880 (1993-05-01), Wada et al.
Babbitt et al, Planar Mcirowave Electro-Optic Phase Shifters, Microwave Jnal, Jun. 1992.

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