A temperature sensor and its manufacturing method

• Main Authors: HATA, TAKUOKI, SAKODA, YOKO, TAKAHASHI, MASAYUKI, MORIWAKE, HIROKI
• Format: Patent
• Language: English; French; German
• Published: 27.03.1996
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; RESISTORS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

This invention relates to a temperature sensor determining the temperature of catalyst provided to process automobile exhaust gas, and a manufacturing method thereof. Said temperature sensor consists of a heat resistant cap, and a thermistor element having a very little long-term resistivity change disposed within said heat-resistant cap, and lead-wires connected to said thermistor elements to connect said thermistor element to an external circuit. The major materials constituting said thermistor are expressed by a below-shown chemical formula and composition, and this is combined with a minor material of CaO, rare-earth oxide, ThO2, or ZrO2, or a combination of these. The thermistor is manufactured through the processes of mixing, calcination,pulverization, granulation, and sintering. (Al1-x-yCrxFey)2O3 0.05 </= x + y </= 0.95, and 0.05 </= y/(x + y) </= 0.6