The 3ω technique for measuring dynamic specific heat and thermal conductivity of a liquid or solid
- 1 January 1996
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 67 (1), 29-35
- https://doi.org/10.1063/1.1146545
Abstract
We show how to measure dynamic specific heat and thermal conductivity of a solid or liquid sample using the 3ω technique, which is an ac‐modulation method where we use a heater simultaneously as the sensor. By varying the width of the heater relative to the thermal decay length, one can choose the proper regime to measure thermal conductivity or specific heat. The technique is applied to window glass and the results confirm the validity of the method. Experimental results for potassium dihydrogen phosphate crystal demonstrate the first‐order transition at the Curie point, and the dynamic specific heat of supercooled liquid potassium–calcium nitrate is shown.Keywords
This publication has 13 references indexed in Scilit:
- Ergodic-nonergodic glass transition and enthalpy relaxation of a supercooled liquid [Ca((Physical Review B, 1995
- Effect of the bias field on the thermal conductivity of KH2PO4 near the Curie pointSolid State Communications, 1993
- Fully automated dynamic calorimeterMeasurement Science and Technology, 1992
- Thermal conductivity measurement from 30 to 750 K: the 3ω methodReview of Scientific Instruments, 1990
- Thermal conductivity of thin films: Measurements and understandingJournal of Vacuum Science & Technology A, 1989
- Wide-frequency specific heat spectrometerReview of Scientific Instruments, 1987
- Hysteresis-Loop Measurements of Critical-Point Exponents in FerroelectricsPhysical Review B, 1969
- The fluctuation-dissipation theoremReports on Progress in Physics, 1966
- High-Temperature Specific Heats of Ge, Si, and Ge-Si AlloysJournal of Applied Physics, 1965
- Physical Properties of Titanium. III. The Specific HeatJournal of Applied Physics, 1963