Measurement of thin film thermal conductivity using the laser flash method

Ruoho, Mikko; Valset, K.; Finstad, T. G.; Tittonen, Ilkka

doi:10.1088/0957-4484/26/19/195706

Cited by 37 publications

(19 citation statements)

References 27 publications

(44 reference statements)

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“…The error of the TC measurements was estimated from contributions of the density, diffusivity, and specific heat measurement errors (a 3 % error for the DSC measurements was used). This error is estimated to be 7 % for the equipment used, which is generally in agreement with an uncertainty of 8 % for a single TC measurement given by Ruoho et al [18].…”

Section: Measurements and Calculations Of Thermal Propertiessupporting

confidence: 89%

Thermal Properties of Selectively Laser-Melted AlSi10Mg Products with Different Densities

Martínez-Maradiaga

Mishin

Engelbrecht

2020

J. of Materi Eng and Perform

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The thermal diffusivity and thermal conductivity of selectively laser melted AlSi10Mg samples with different target relative densities, 99 % and 99.5 %, have been studied in the temperature range 25 °C to 400 °C. The properties were measured in the build direction and orthogonal to the build direction, for the samples in the as-built and heat-treated conditions. The 99.5 % dense samples are characterized by a noticeably higher thermal diffusivity and higher thermal conductivity than the 99 % dense samples. For each sample, it is found that the applied heat treatment improves the thermal diffusivity and thermal conductivity of the as-built material, but also results in pronounced anisotropy, with greater thermal diffusivity and conductivity in the build direction, especially for the 99.5% dense sample. The anisotropy is attributed to the presence of Si particles along the grain boundaries of columnar grains. Since the columnar grains are elongated along the build direction, a smaller spacing between particle-decorated boundaries in the plane perpendicular to the build direction presents a higher resistance to the heat conduction.

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Section: Measurements and Calculations Of Thermal Propertiessupporting

confidence: 89%

Thermal Properties of Selectively Laser-Melted AlSi10Mg Products with Different Densities

Martínez-Maradiaga

Mishin

Engelbrecht

2020

J. of Materi Eng and Perform

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“…no lateral heat loss). The testing sample is usually prepared by spraying a layer of graphite on both sides to act as an absorber on the front side and as an emitter on the rear side for temperature sensing [67]. The rear-side infrared radiation thermometer should be fast enough to respond to the emitting signals, and the precision of temperature calibration is usually ± 0.2 K [53].…”

Section: Laser Flash Methods For Thermal Diffusivitymentioning

confidence: 99%

Measurement Techniques for Thermal Conductivity and Interfacial Thermal Conductance of Bulk and Thin Film Materials

Zhao

Qian

et al. 2016

Journal of Electronic Packaging

400

222

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Thermal conductivity and interfacial thermal conductance play crucial roles in the design of engineering systems where temperature and thermal stress are of concerns. To date, a variety of measurement techniques are available for both bulk and thin film solid-state materials with a broad temperature range. For thermal characterization of bulk material, the steady-state method, transient hot-wire method, laser flash diffusivity method, and transient plane source method are most used.For thin film measurement, the 3ω method and the transient thermoreflectance technique including both time-domain and frequency-domain analysis are widely employed. This work reviews several most commonly used measurement techniques. In general, it is a very challenging task to determine thermal conductivity and interfacial thermal conductance with less than 5% error.Selecting a specific measurement technique to characterize thermal properties needs to be based on: 1) knowledge on the sample whose thermophysical properties is to be determined, including the sample geometry and size, and the material preparation method; 2) understanding of fundamentals and procedures of the testing technique, for example, some techniques are limited to samples with specific geometries and some are limited to a specific range of thermophysical properties; 3) understanding of the potential error sources which might affect the final results, for example, the convection and radiation heat losses.

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“…The methods with transient or periodic sample heating [9], are also used for the determination of thermal parameters. Among them the main ones are the 3ω method [10], the laser flash method [11], photoacoustic (PA) technique with piezoelectric [12,13] and gasmicrophone (GM) registration configurations.…”

Section: Introductionmentioning

confidence: 99%

Optimized photoacoustic gas-microphone cell for semiconductor materials thermal conductivity monitoring

Lishchuk

2021

Phys. Chem. Solid St.

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An approach for examination of semiconductor materials thermal conductivity based on the photoacoustical (PA) experimental results has been considered. Attention is drawn to the importance of PA cell design and normalization procedure that must be carried out in order to remove the parasitic signal caused by the PA cell effects as well as a contribution from the electronic components. The proposed technique makes it possible to quickly and reliably diagnose the thermal conductivity of various semiconductors materials for a better understanding of the heat transfer there for various technological applications. To test the methodology, thermal conductivity of monocrystalline silicon with different doping level was considered. The obtained dependence of thermal conductivity on the doping level is in a good agreement with well-known literature data. Thus, the results obtained in this work are important from a practical point of view.

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Measurement of thin film thermal conductivity using the laser flash method

Cited by 37 publications

References 27 publications

Thermal Properties of Selectively Laser-Melted AlSi10Mg Products with Different Densities

Thermal Properties of Selectively Laser-Melted AlSi10Mg Products with Different Densities

Measurement Techniques for Thermal Conductivity and Interfacial Thermal Conductance of Bulk and Thin Film Materials

Optimized photoacoustic gas-microphone cell for semiconductor materials thermal conductivity monitoring

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