Title: Humidity sensitive ceramic resistor

Abstract: Humidity sensitive ceramic resistor having a high humidity activity, a low electrical resistance and a high stability with respect to time, temperature, humidity and electric load and suited for use in humidity-controlling devices is provided by a sintered mixture of a main component, which consists essentially of chromium oxide and at least one metal oxide selected from the group consisting of TiO.sub.2, ZrO.sub.2, HfO.sub.2, SnO.sub.2, Nb.sub.2 O.sub.5, Ta.sub.2 O.sub.5, WO.sub.3, MnO.sub.2, MoO.sub.2, CeO.sub.2, DyO.sub.2, VO.sub.2, SiO.sub.2 and GeO.sub.2, and an addition of at least one metal oxide selected from the group consisting of BeO, MgO, CaO, SrO, BaO, FeO, NiO, CuO, ZnO, CdO and PbO. Furthermore, humidity sensitive thin layer ceramic resistor having an improved quick response to humidity is obtained by sintering a mixture having the above composition with a glass frit binder.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Nitta, Tsuneharu (Katano, JA)
Terada, Ziro (Yao, JA)
Hayakawa, Shigeru (Hirakata, JA)

Application Number: 652702
Filing Date: 1976-01-27
Publication_date: 1977-03-29
Assignee: Matsushita Electric Industrial Co., Ltd. (JA)
Primary Class(es): 338/35 252/519.5, 252/519.54, 252/520.1, 252/520.2, 252/520.4, 252/520.5, 252/521.2, 252/521.3, 338/308, 338/314, 422/98
Other Classes:
US Patent Ref:

3748625	Jul, 1973	Bennewitz	338/34.
3864659	Feb, 1975	Furauchi et al.	338/35.
3961301	Jun, 1976	Fraioli	338/35.

Other Refs:
Primary Examiner: Albritton, C. L.
Assistant Examiner:
Attorney: Wenderoth, Lind & Ponack