Patent Number: 6,251,816

Title: Capacitor and dielectric ceramic powder based upon a barium borate and zinc silicate dual-component sintering flux

Abstract: Temperature compensating capacitors and dielectric ceramic powder compositions therefor are disclosed, based upon a dual-component barium borate and zinc silicate sintering flux. The precursor dielectric ceramic powders can include (1-m) BaTiO.sub.3 +(m) CaZrO.sub.3 (BTCZ composition), with m ranging from 20 mole percent to 35 mole percent, xBaO.yTiO.sub.2.zRE.sub.2 O.sub.3 (rare earth composition), (RE being a rare earth metal), with x ranging from 0 m % to 30 m %, y ranging from 45 m % to 95 m %, and z ranging from 5 m % to 50 m %, or a combination of the BTCZ and rare earth composition in varying weight percents. The effective range of B.sub.2 O.sub.3 in the barium borate ranges from 0.029 w % to 2.75 w % of the total dielectric composition, whereas the effective range of SiO.sub.2 in the zinc silicate ranges from 0.08 w % to 1.42 w % of the total dielectric composition.

Inventors: Maher; Galeb H. (Williamstown, MA), Maher; Samir G. (Williamstown, MA)

Assignee: MRA Laboratories, Inc.

International Classification: H01G 4/12 (20060101); C04B 035/468 (); C04B 035/488 (); C04B 035/49 (); H01G 004/10 ()

Expiration Date: 06/26/2018