US 7,585,106 B2
	Temperature fixed-point cell, temperature fixed-point device and method of calibration of thermometer
Yoshiro Yamada, Tsukuba (Japan); and Naohiko Sasajima, Tsukuba (Japan)
Assigned to National Institute of Advanced Industrial Science and Technology, Tokyo (Japan)
Filed on Feb. 23, 2007, as Appl. No. 11/678,370.
Claims priority of application No. 2006-048256 (JP), filed on Feb. 24, 2006.
Prior Publication US 2007/0201534 A1, Aug. 30, 2007
Int. Cl. G01K 15/00 (2006.01); G01K 19/00 (2006.01)

U.S. Cl. 374—2  [374/1; 374/16; 374/121]

17 Claims

1. A temperature fixed-point cell for calibrating a thermometer, comprising a crucible made of graphite and a fixed-point material enclosed in the crucible and characterized in that the temperature fixed-point cell is provided on one side thereof with a blackbody cavity and that the fixed-point material has a peritectic structure composed of carbon and a metal carbon compound.