Download or read book Thermal Conductivity Measurements of Amorphous Metal Thin Films Via the 3 omega Method written by Kai Zhan and published by . This book was released on 2014 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amorphous multicomponent metals have promising applications in novel electronic devices because of their atomically smooth surface morphology and lack of grain boundaries. It is important to understand the thermal transport properties of amorphous metals and an accurate measurement of their thermal conductivity will be essential for further improvement of device performance and reliability. Here, the 3[omega] method has been improved and extended to investigate the room temperature thermal conductivity of amorphous metals. Iterative, amorphous multicomponent metallic films are deposited on silicon substrate by magnetron sputter deposition. A thin layer of hafnium oxide film is deposited on top of amorphous metals by atomic layer deposition, providing a reliable insulation between an aluminum heater and the amorphous metal film. The room temperature thermal conductivities of thin-film hafnium oxide and silicon nitride are also measured to demonstrate the capability and reliability of the 3[omega] technique.

Download or read book Thermal Conductivity Measurements of Bulk Materials and Thin Films by the 3 omega Method written by Romy Liske and published by . This book was released on 2005 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Conductivity Measurements of Thin Films Using a Novel 3 Omega Method written by Manuel Bogner and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Thermal Conductivity of Thin Films by the 3 omega Method written by Nicola Schmidt and published by . This book was released on 2012 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Conductivity of Amorphous Carbon Thin Films written by and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Conductivity Measurements and Modeling of Thin Films written by George Chung Kit Chen and published by . This book was released on 2000 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Conductivity of Amorphous Carbon and Other Amorphous Thin Films written by Andrew James Bullen and published by . This book was released on 1999 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Conductivity Measurements Using the 3 omega Technique written by David De Koninck and published by . This book was released on 2008 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of the Thermal Conductivity of Dielectric Thin Films Through Experimental Measurement and Crystallographic Analysis written by Max S. Aubain and published by . This book was released on 2013 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prediction and measurement of the thermal conductivity, k, of crystalline materials, particularly in those with nano-scaled structural features, continues to pose a challenge to the heat transfer community. One difficulty arises in the correlation of experimental data with the theoretically calculated, direction-specific phonon dispersion characteristics that determine thermal conductivity, such as heat capacity and group velocity. k is often considered a scalar quantity, which implicitly assumes three-dimensional isotropic behavior, e.g., k of wurtzite (hexagonal) aluminum nitride at room temperature is considered to be 320 W/m.K. Although, simultaneously, it is acknowledged that the phonon transport characteristics within crystalline materials varies non-negligibly with direction; we calculate the a-axis and c-axis heat capacity and group velocity at room temperature to be different by approximately a factor of 10 and 2.5, respectively, favoring basal-plane heat conduction. Experimental measurements may elucidate these phenomena, but fabrication of large single crystals in multiple orientations is impractical for most materials, and in those samples which are commonly single crystal, such as thin films, nanowires, or nanodots, it is difficult to measure the full thermal conductivity tensor. This dissertation then develops two experimental techniques to measure k anisotropy of two substrate-supported thin film systems. An optical technique called thermoreflectance thermometry was utilized to measure the heat transport that takes place only within the plane of Si films, ranging in thickness from 70 nm to 255 nm, atop thermally insulating substrates. The use of an optical method was deployed to preclude possible heat losses from contacted thermometer structures and enabled temperature measurements with sub-miliKelvin resolution, with 4 um spatial resolution. Additionally, heater/thermometer structures, in a 3w measurement configuration, were used to simultaneously probe the cross-plane and in-plane heat transport characteristics of aluminum nitride thin films, between 500 nm and 750 nm thick, deposited by molecular beam epitaxy on sapphire substrates. Finite element models were applied to fit the measured data, using the thin film thermal conductivity as a free parameter. Finally, the results are discussed with respect to calculations of the heat capacity and group velocity based on phonon dispersion relations, and scattering mechanisms specific to the thin film samples.

Download or read book Thermal Conductivity Measurement Design for Thin Film Materials written by Karin Giesecke and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Thermal Conductivity of Diamond Thin Films by the Ac Calorimetric Method written by J. Kaitila and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Thermal Conductivity of Thin Films on Silicon Substrates written by International Organization for Standardization and published by . This book was released on 2002 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Conductivity Measurements of Silicon Thin Films with Periodically Nanoscale Perforations written by and published by . This book was released on 2011 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Conductivity Measurement of Thin Film of Carbon SWNT Using the 3w Technique written by Anton Nickolaevich Sidorov and published by . This book was released on 2005 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Conductivity Measurement Using the 3 omega Technique written by David Andrew De Koninck and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Construction of a Thermal Conductivity Measurement Platform for Bulk and Thin Film Materials Based on the 3 Omega Technique written by Abbas Jaber and published by . This book was released on 2014 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured materials show signicant enhancement in the thermoelectric g-ure of merit (zT) due to quantum connement eects. Improving the eciency ofthermoelectric devices allows for the development of better, more economical wasteheat recovery systems. Such systems may be used as bottoming or co-generationcycles in conjunction with conventional power cycles to recover some of the wastedheat. Thermal conductivity measurement systems are an important part of the char-acterization processes of thermoelectric materials. These systems must possess thecapability of accurately measuring the thermal conductivity of both bulk and thin-lmsamples at dierent ambient temperatures. This paper discusses the construction, validation, and improvement of a thermalconductivity measurement platform based on the 3-Omega technique. Room temperaturemeasurements of thermal conductivity done on control samples with known propertiessuch as undoped bulk silicon (Si), bulk gallium arsenide (GaAs), and silicon dioxide(SiO2) thin lms yielded 150 W=m - K, 50 W=m - K, and 1:46 W=m - K respectively. These quantities were all within 8% of literature values. In addition, the thermalconductivity of bulk SiO2 was measured as a function of temperature in a Helium-4 cryostat from 75K to 250K. The results showed good agreement with literaturevalues that all fell within the error range of each measurement. The uncertainty inthe measurements ranged from 19% at 75K to 30% at 250K. Finally, the systemwas used to measure the room temperature thermal conductivity of a nanocompositecomposed of cadmium selenide, CdSe, nanocrystals in an indium selenide, In2Se3,matrix as a function of the concentration of In2Se3. The observed trend was inqualitative agreement with the expected behavior.i.

Download or read book Thermally Conductive Polymer Composites written by Junwei Gu and published by Elsevier. This book was released on 2023-01-20 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermally Conductive Polymer Composites provides an important introduction to the key principles, methods, and research directions of this emerging thermal management material category. This book introduces thermal conduction, measurement methods, thermal conduction mechanisms, and related theories. It also reviews classification and processing techniques which impact thermal conductivity performance. Thermally conductive composites discussed include intrinsically thermally conductive polymers, thermally conductive fillers, and thermally conductive polymer composites. Furthermore, the interfacial thermal resistance is thoroughly explained including basic concepts, theoretical research, and characterization. Finally, the practical applications of thermally conductive polymer composites are illustrated such as thermally conductive plastics, thermally conductive rubbers, and thermally conductive adhesives. Covers measurement methods, thermal conductivity mechanisms and models Introduces thermally conductive polymers, intrinsically thermal conductors, fillers and composites, as well as interfaces Reviews advances in classification and processing techniques