Humidity sensitive ceramic resistor

Details Humidity sensitive ceramic resistor Humidity sensitive ceramic resistor

1976-01-27

1977-03-29

Albritton, C. L.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

23254E, 338308, 338314, H01L 700

Patent

active

040152308

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.

REFERENCES:
patent: 3748625 (1973-07-01), Bennewitz
patent: 3864659 (1975-02-01), Furauchi et al.
patent: 3961301 (1976-06-01), Fraioli

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