Non-linear resistance element, method for preparing same and noi

Details Non-linear resistance element, method for preparing same and noi Non-linear resistance element, method for preparing same and noi

1979-08-08

1981-12-15

Vertiz, O. R.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

252520, 501134, H01C 710, H01B 108, C04B 3546

Patent

active

043062148

ABSTRACT:
A novel non-linear resistance element or a varistor element is proposed which is a sintered body composed of a ternary oxide mixture comprising titanium dioxide as the base component, bismuth oxide and a third oxide component selected from the group consisting of oxides of tantalum, niobium and antimony admixed in limited proportions. The sintered body is prepared by subjecting the powder mixture obtained by admixing a solution containing tantalum, niobium or antimony with titanium dioxide and bismuth oxide to sintering following drying and calcination. The varistor element of the invention is stable in its performance and has a sufficiently high non-linearity index so that excellent noise suppressors are prepared with the varistor element to be useful in absorbing the noise voltages generated in various rotatory machines such as miniature motors.
Further improvement in the above varistor element is proposed by adding a small amount of silicon dioxide to the ternary oxide mixtures.

REFERENCES:
patent: 3033907 (1962-05-01), Rue
patent: 3274467 (1966-09-01), Graf
patent: 3715701 (1973-02-01), Yperman
patent: 3816348 (1974-06-01), Popowich
patent: 3903226 (1975-09-01), Iga
patent: 3953375 (1976-04-01), Nagano et al.
patent: 4094061 (1978-06-01), Gupta et al.
patent: 4109456 (1978-08-01), Yamada et al.

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