Claims
- 1. A method for preparing a thermistor comprising a thermistor composition having iron, praesodynium and oxygen in a respective molar ratio of about 1:1:3, which comprises:
- (a) admixing Pr.sub.6 O.sub.11 and Fe.sub.2 O.sub.3 in a molar ratio of Fe to Pr of about 1:1;
- (b) heating at a temperature above about 1000.degree. C.; and
- (c) incorporating at least two spaced apart conducting leads into the thermistor composition.
- 2. A method in accordance with claim 1, wherein the conducting leads comprise platinum.
Parent Case Info
This is a division of application Ser. No. 857,498, filed Dec. 5, 1977, now U.S. Pat. No. 4,162,631, issued July 31, 1979.
US Referenced Citations (11)
Foreign Referenced Citations (3)
Number |
Date |
Country |
1042080 |
Oct 1958 |
DEX |
2245345 |
Apr 1975 |
FRX |
2315151 |
Jan 1977 |
FRX |
Non-Patent Literature Citations (1)
Entry |
Rao et al., "Electrical Transport in Rare Earth Ortho-Chromites-Manganites and-Ferrites", Phys. Chem. Solids, vol. 32, pp. 345-358, 1971. |
Divisions (1)
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Number |
Date |
Country |
Parent |
857498 |
Dec 1977 |
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