가스압력조절식 나트륨 열관전기로를 이용한 은 고정점 실현과 고온백금저항온도 계측에의 응용 = Realization of silver fixed-point and application for the high temperature platinum resistance thermometry using the gas-pressure controlled sodium heat-pipe furnace

다국어 초록 (Multilingual Abstract)

Pressure-controlled sodium heat pipe furnace was designed and fabricated, and its characteristics was investigated. Pressure control system was controlled within ± 0.5 Pa at 150 kPa and the stability of pressure was decreased to ± 2.5 Pa, when the pressure-controlled system connected with the heat pipe. The melting curve of Ag fixed-point realized well by the adiabatic method using the pressure-controlled sodium heat pipe furnace and its accuracy showed ± 2.27 mK from the calculation of 20 % to 80 % at the plateau. The freezing curve of Ag fixed-point also realized and its plateau value was 2.23 mK lower than that of the melting curve.

참고문헌 (Reference)

1 A. Merlone, 227-232, 2004

2 G. M. Grover, "US Patent 3229759"

3 R. S. Gaugler, "US Patent 2350348"

4 H. Preston-Thomas, "The international temperature scale of 1990 (ITS-90)" 27 : 3-10, 1990

5 P. Marcarino, "Temperature, it’s measurement and control in science and industry" 7 (7): 951-956, 2002

6 M. Gotoh, "Temperature, it’s measurement and control in science and industry" 6 (6): 955-960, 1992

7 P. Dunn, "Heat pipes(2nd Ed.)" The Pergamon Press 1978