[특허]Cermet varistors

Cermet varistors 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01C-007/10
출원번호	US-0625605 (1975-10-24)
발명자 / 주소	Kouchich Allan (Milwaukee WI) Taylor George W. (Oak Creek WI)
출원인 / 주소	Allen-Bradley Company (Milwaukee WI 02)
인용정보	피인용 횟수 : 24 인용 특허 : 0

초록 ▼

The cermet varistors have electrodes applied to an improved varistor composition which includes a semi-conductive material having zinc oxide in admixture with at least one metal oxide selected from the group consisting of chromium oxide, cobalt oxide and manganese oxide and includes a glass matrix. The glass matrix is a borosilicate glass with at least one metal oxide selected from the group consisting of cobalt oxide and manganese oxide. The improved compositions are used in varistors of both the thick film and bulk types, the resulting varistors having enhanced device characteristics, particularly high exponents of nonlinearity.

대표청구항 ▼

A varistor having a nonlinear current-voltage characteristic defined by the relation I =(V/C) where I is the current flowing through the varistor, V is the voltage across the varistor, C is a constant proportional to the varistor, and a>1 and is a measure of the nonlinearity of the varistor, said varistor having an a10, comprising: an inert substrate; a thick film associated with said inert substrate comprising a varistor composition consisting essentially of from about 75.0 to about 92.0 weight percent of a semi-conductive material and from about 25.0 to about 8.0 weight percent of glass matrix; said semi-conductive material consisting predominantly of zinc oxide in admixture with a small amount of at least one metal oxide selected from the group consisting of chromium oxide, cobalt oxide and manganese oxide; said glass matrix consisting primarily of a borosilcate glass with, as an additive, at least one metal oxide selected from the group consisting of cobalt oxide and manganese oxide; and a pair of electrodes applied to said thick film. A varistor having a nonlinear current-voltage characteristic defined by the relation I =(V/C) where I is the current flowing through the varistor, V is the voltage across the varistor, C is a constant propoRtional to the varistor, and a>1 and is a measure of the nonlinearity of the varistor, said varistor having an a10, comprising: a bonded mass of particles comprising a varistor composition consisting essentially of from about 90.0 to about 99.0 weight percent of a semi-conductive material and from about 10.0 to about 1.0 weight percent of a glass matrix; said semi-conductive material consisting predominantly of zinc oxide in admixture with a small amount of at least one metal oxide selected from the group consisting of chromium oxide, cobalt oxide and manganese oxide; said glass matrix consisting primarily of a borosilicate glass with, as an additive, at least one metal oxide selected from the group consisting of cobalt oxide and manganese oxide; and a pair of electrodes applied to said bonded mass.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Cermet varistors 원문보기

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Cermet varistors 원문보기

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이 특허를 인용한 특허 (24)

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