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Electric Motor Thermal Management R&D

NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. For more information, contact: Principal Investigator Kevin Bennion [email protected] Phone: …

High Thermal Conductivity Ceramics and Their …

15/11/2017· The in-plane and through-plane thermal conductivities are about 300 and 30 W/mK, and the average apparent value is 33 W/mK. The h-BN has low dielectric constant and loss tangent, ε r = 4–4.6, tan δ = 0.0012–0.0017 at 8.8 GHz, and dielectric strength at AC = 67–95 kV, which varies depending on the purity.

Thermal Conductivity of Compacted GO-GMZ …

In China, Gaomiaozi (GMZ) bentonite serves as a feasible buffer material in the high-level radioactive waste (HLW) repository, while its thermal conductivity is seen as a crucial parameter for the safety running of the HLW disposal. Due to the tremendous amount of

The Origin of High Thermal Conductivity and Ultralow …

We developed a nanocomposite with highly aligned graphite platelets in a copper matrix. Spark plasma sintering ensured an excellent copper–graphite interface for transmitting heat and stress. The resulting composite has superior thermal conductivity (500 W m –1 K –1, 140% of copper), which is in excellent agreement with modeling based on the effective medium approximation.

Preparation and Thermal Conductivity of Spark Plasma …

The in‐plane TC of 50 vol% titanium‐coated graphite fiber/Al composites sintered at 610 C is 238 W m −1 K −1, nearly twice as high as that of uncoated composites. From the calculation based on the experimental TC by Maxwell–Garnett effective medium approach, the interfacial thermal resistance is evidently decreased by above 1 order of magnitude with the introduction of titanium

Thermal Conductivities of LaPO4/Al2O3 Composites …

The thermal conductivities of the LaPO4/Al2O3 composites that were fabried by spark plasma sintering (SPS) were determined. The results revealed that their thermal conductivities displayed nearly a slow decrease with increasing temperature from 25oC to 800oC, having the classic 1/T dependence.

Properties of soapstone | Tulikivi

Thermal conductivity: 6.4 W/mK Specific heat capacity: 0.98 J/gK Density: 2,980 kg/m³ Flexural strength along the grain: 16.8 MN/m² Flexural strength perpendicular to the grain: 15.7 MN/m² Thermal conductivity The fact that soapstone has a better thermal

Lunawood - Thermowood - stable and sustainable wood …

Lunawood Thermally modified tier is available as standard in thicknesses 25, 32, 38, 50 mm. Standard widths 100, 125, 150, 175, 200 mm. Planed finished sizes are slightly smaller than with unmodified wood. Recommended planed dimensions are 19, 26, 32, & 42 mm thick and 92, 117, 140, 165, & 185 mm wide.

Reduction of the thermal conductivity in free-standing …

31/1/2014· The thermal conductivity of the thinnest merane with d = 9 nm resulted in (9 ± 2) W/mK, thus approaching the amorphous limit but still maintaining a high crystalline quality. A series of meranes with thicknesses ranging from 9 nm to 1.5 μm was investigated using Raman thermometry, a novel contactless technique for thermal conductivity determination.

Understanding of the Extremely Low Thermal …

Abstract. P‐type polycrystalline SnSe and K 0.01 Sn 0.99 Se are prepared by coining mechanical alloying (MA) and spark plasma sintering (SPS). The highest ZT of ≈0.65 is obtained at 773 K for undoped SnSe by optimizing the MA time. To enhance the electrical transport properties of SnSe, K is selected as an effective dopant.

Announces Innovative Epoxy Molding …

Kyoto/London - Corporation has recently developed a high-thermal-conductivity epoxy molding compound with a thermal conductivity of 6W/mK. This marks a significant increase in the conventional thermal conductivity of 0.9-3W/mK and thus enhances the protection of semiconductor components from light, temperature, humidity, dust and physical shock.

Magnetic Properties and High Thermal Conductivity …

Abstract: The Al 2 O 3 ceramics with high thermal conductivity prepared the spark plasma sintering (SPS) technology. The structure, image and magnetic properties of the SPS Al 2 O 3 ceramics was characterized by X-ray, field emission scanning electron microscope (FE-SEM) and the vibrating sample magnetometer (VSM) at room temperature.

Effect of particle size on the microstructure and thermal …

Spark plasma sintering (SPS) was used to fabrie Al/diamond composites. The influence of diamond particle size on the microstructure and thermal conductivity (TC) of composites was investigated by coining experimental results with model prediction. The results show that both composites with 40 µm particles and 70 µm particles exhibit high

Thermal conductivity - Wikipedia

Solving for , we get the equation which converts from specific thermal conductivity to absolute thermal conductivity: λ A = λ ⋅ A t {\displaystyle \lada _{A}={\frac {\lada \cdot A}{t}}} Again, since thermal conductivity and resistivity are reciprocals of each other, it follows that the equation to convert specific thermal conductivity to absolute thermal resistance is:

Technical Data | Thermal Interface Materials | Fujipoly

Fujipoly is the leader in the design, formulation and production of high-performance Thermal Interface Materials, Elastomeric Connectors and Custom Silicone Extrusions. We have steadily grown during the course of time and now operate a global network of 9 manufacturing and distribution centers to deliver you unprecedented product performance and dependability..

Using crystallographic shear to reduce lattice thermal …

We report the thermoelectric properties of spark plasma sintered Magnéli phases WO 2.90 and WO 2.722. The crystallographic shear planes, which are a typical feature of the crystal structures of Magnéli-type metal oxides, lead to a remarkably low thermal 2.90

Thermoelectric properties of spark-plasma sintered …

Spark plasma sintering was used as consolidation method to maintain the particle size. The thermoelectric performance of FeSb 2 is limited by its high thermal conductivity. In this work, the thermal conductivity was suppressed by nearly 80% compared to the bulk value by introducing grain boundary stering of phonons on the nanoscale.

Thermal conductivity of spark plasma sintered SiC …

14/12/2020· High thermal conductivity of spark plasma sintered silicon carbide ceramics with yttria and scandia J. Am. Ceram. Soc., 100 (4) (2017), pp. 1290-1294 CrossRef View Record in Scopus Google Scholar Y. Zhou, K. Hirao, Y. Yamauchi, S. Kanzaki Effects of rare ,

(PDF) High entropy phenomena induced low thermal …

PDF | The facile synthesis approach coining the mechanical alloying (5hrs) and spark plasma sintering (SPS) (11min) of BiSbTe1.5Se1.5 high entropy | Find, read and cite all

Spark Plasma Sintered Silicon Nitride Ceramics with …

Si3N4 with high thermal conductivity (120 W/(m.K)) was developed by promoting grain growth and selecting a suitable additive system in terms of composition and amount. β-Si3N4 doped with Y2O3

Henkel Expands Line of High Thermal Conductivity …

BERGQUIST GAP PAD® TGP 10000ULM is a formulation that provides exceptionally high thermal conductivity of 10.0 W/m-K within an ultra-low modulus, low assely stress formulation. The coination of these characteristics makes the material one of the highest performing TIMs available in the market today.

Comparative Study of the Thermal Conductivity of …

The thermal conductivity of solid biomass fuels is useful information in the investigation of biomass coustion behavior and the development of modeling especially in the context of large scale power generation. There are little published data on the thermal conductivity of certain types of biomass such as wheat straw, miscanthus, and torrefied woods. Much published data on wood is in the

High thermal conductivity of spark plasma sintered silicon …

A fully dense SiC ceramic with a room‐temperature thermal conductivity of 262 W·(m·K) −1 was obtained via spark plasma sintering β‐SiC powder containing 0.79 vol% Y 2 O 3 ‐Sc 2 O 3. High‐resolution transmission electron microscopy revealed two different SiC‐SiC boundaries, that is, amorphous and clean boundaries, in addition to a fully crystallized junction phase.

C4 NATIONAL BUILDING CODE OF FINLAND - Edilex

Thermal conductivity (λ), W/(m ⋅ K) Thermal conductivity indies the density of heat flow in steady-state through a layer of homogenous material with a thickness of a unit of length when the temperature difference betw een the surfaces of the material layer is a ⋅

The Origin of High Thermal Conductivity and Ultralow …

Spark plasma sintering ensured an excellent copper-graphite interface for transmitting heat and stress. The resulting composite has superior thermal conductivity (500 W m(-1) K(-1), 140% of copper), which is in excellent agreement with modeling based on the

high thermal conductivity of sparkplasma introductions

high thermal conductivity of sparkplasma introductions High Thermoelectric Performance of … The thermoelectric hetero nano region, as a new strategy, can effectively modulate the electrical and thermal transport properties. In this study, the thermoelectric hetero

Unusually High and Anisotropic Thermal Conductivity …

Here, we used structures of a-Si nanotubes and suspended a-Si films that enabled precise in-plane thermal conductivity (κ∥) measurement within a wide thickness range of 5 nm to 1.7 μm. We showed unexpectedly high κ∥ in a-Si nanostructures, reaching ∼3.0 …

US Patent for High density UOand high thermal …

High density UOand high thermal conductivity UOcomposites by spark plasma sintering (SPS) Aug 15, 2013 - University of Florida Research Foundation, Inc. Eodiments of the invention are directed to a method for production of a nuclear fuel pellet by spark plasma sintering (SPS), wherein a fuel pellet with more than 80% TD or more than 90% TD is formed.