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Thermal conductivity measurements on ferrofluids
Colloid and Polymer Science, 1982The thermal conductivity of a number of ferrofluids consisting of colloidally dispersed Fe3O4 particles in diester, hydrocarbon, water and fluorcarbon carriers have been measured at 38°C. The variation in thermal conductivity with particle concentration is well described by Tareef's equation (1940).
J. Popplewell +4 more
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A noncontact thermal microprobe for local thermal conductivity measurement
Review of Scientific Instruments, 2011We demonstrate a noncontact thermal microprobe technique for measuring the thermal conductivity κ with ∼3 μm lateral spatial resolution by exploiting quasiballistic air conduction across a 10–100 nm air gap between a joule-heated microprobe and the sample.
Yanliang, Zhang +4 more
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Apparatus to measure thermal conductance
Cryogenics, 1980Abstract An apparatus for measuring the thermal conductance of insulating mechanical supports under compression is described. It requires no installation of thermometers on the sample. Results on sample supports are presented by plots of the heat conducted between two temperatures as a function of the force compressing the support.
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Thermal Conductivity Measurements and Results
2021During the thermal conductivity measurements of the HgTe-based ternary melts, because the samples need to be hermetically contained inside a sealed fused silica ampoule the transient measurement by laser flash method was adopted. In most of the reports, measurements were performed to obtain thermal diffusivity first and then, thermal conductivity was ...
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New method for measuring the thermal conductivity
Review of Scientific Instruments, 1978A new experimental method is presented for measuring the thermal conductivity as a function of temperature. The basic innovation lies in extracting from the measured temperature profile of a sample in vacuo, the thermal conductivity of each individual cross-sectional sample element. The estimated experimental error is ±1%.
E, Goldratt, A J, Greenfield
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Measurement of Thermal Conductance
1977The 6-m long, 45-kG, warm-iron superconducting magnets envisioned for the Energy Doubler stage of the Fermilab accelerator require stiff supports with minimized thermal conductances in order to keep the refrigeration power reasonable. The large number of supports involved in the system required a careful study of their heat conduction from the room ...
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How to Measure Thermal Conductivity
2014The methods to measure the thermal conductivity at low temperature are described: the steady-state techniques, (Sect. 2.2); the 3ω technique (Sect. 2.3); and the thermal diffusivity measurement (Sect. 2.4). Each of these techniques has its own advantages as well as its inherent limitations, with some techniques more appropriate to specific sample ...
Guglielmo Ventura, Mauro Perfetti
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An accurate method for thermal conductivity measurement of thermally conductive adhesives
Proceedings of the 2011 34th International Spring Seminar on Electronics Technology (ISSE), 2011In the following paper the measurement method of thermal conductivity is described. These method was especially designed for measuring the thermal conductivity of the thermally conductive adhesives. The principal information about the experimental setup, mathematical model of experiment and the change of its uncertainty (calculated using type B method ...
Bartosz Platek, Tomasz Falat, Jan Felba
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Measuring thermal conductivity and diffusivity
2020This chapter discusses many of the techniques available for measuring thermal properties for the materials that are useful in the construction of electronic devices and circuits. It suggests that thermal conductivity which is the important quantity for thermal management on length scales usually encountered with devices/boards.
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Thermal lensing measurements and thermal conductivity of Yb:YAB
Applied Physics B: Lasers and Optics, 2003By using holographic shear interferometry, we have measured the thermal lens in a diode-pumped Yb:YAB crystal, under lasing and non-lasing conditions, as a function of absorbed power. From these purely optical measurements we estimate the fractional thermal loading and the thermal conductivity of Yb:YAB.
J.L. Blows +4 more
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