Yttria and Dysprosia as High-temperature Thermistor Materials.
Hyde-GR; Maust-EE Jr.; Furlong-LR
NTIS: PB 196 612 :8 pages
Sintered yttria and sintered dysprosia can be used to make single- component thermistors having typical thermistor geometries and operable in the temperature range 500 deg. to 1,200 deg. C. However, at these temperatures, instability of platinum electrodes can contribute a slight aging effect if the thermistor is kept near 1,200 deg. C for long periods. Typical characteristics at 500 deg. C for an yttria disk thermistor 12 mm in diameter and 2 mm thick are a resistance of 12.4 Megohms and a temperature coefficient of resistance of -3.8 percent per degree c. Typical characteristics at 500 deg. C for a dysprosia thermistor of the same dimensions are a resistance of 1.84 Kohms and a temperature coefficient of resistance of -1.6 percent per degree c.
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 196 612