Glass-fiber reinforced polymer-matrix composites are widely used in electro and automotive industry due to their easy processing, low cost, and possibility to tailor properties. Functional properties of the composites strongly depend on their weight fractions and individual properties of constituents. In this study, E-glass fiber (EGF) weight and microstructure are analyzed to see the effect on thermal properties of the composites. Thermal transport properties of the composites were measured at ...
Author(s): Barabara Malic, Barbara Bertoncelj, Katarina Vojisavljevic, Marko Vrabelj
The thermal conductivity of two novel polyurea/silica ORMOSILs (Organically Modified Silicates) created for use in high temperature optical applications. The purpose of these new materials was to replace the materials currently in use which start to degrade in high temperature situations. The transmission/absorption, refractive index, thermal conductivity, and thermal stability of the new materials was investigated to determine their suitability. The thermal conductivities measured were 0.26 and 0.27 W/mK ...
Author(s): Alexander N. Khramov, John G. Jones, Joseph A. Shumaker, Justin P. Moore, Lirong Sun, Marlene D. Houtz
This article discussed the creation of phase change composite materials using molten binary salts and expanded graphite (EG). Three different salts were used, LiNO3–KCl, LiNO3–NaNO3 and LiNO3–NaCl. The amount of salt in the composites varied between 77.8% and 81.5%. The thermal conductivity of the products was assessed to determine how it was affected by the addition of expanded graphite. The researchers determined that they had increased the thermal conductivity ...
Author(s): Daili Feng, Ge Wang, Limin Zhong, Xiaowei Zhang, Yanhui Feng, Yi Luan
Expanded graphite (EG) was added to lauric acid (LA)-stearic acid (SA) phase change materials to enhance their thermal conductivities. The PCMs were prepared in varying mass fractions of LA and SA, and 10 wt. % of EG was added. The phase change temperature and phase change enthalpy were determined by DSC, while the thermal conductivities, and thermal stabilities of the PCMs were determined by the transient plane source and thermogravimetric analysis, ...
Author(s): Hua Zhu, Ming Li, Peng Zhang, Zhaonan Meng
Traditionally, white LED's are made by mixing phosphor with an epoxy resin. But, the phosphor is not always evenly distributed, and the epoxy resin has a low thermal conductivity resulting in accelerated thermal aging during operation. This article studies the effects of implementing a ceramic phosphor plate with varying concentrations of magnesium oxide, and silicon dioxide. It was found that as the magnesium oxide concentration increased so did the thermal ...
Author(s): Byung Woo Jeong, Dae-Ho Yoon, Eun-Kyung Ji, Mong Kwon Jung, Sang Hwan Bak, Young-Hyun Song
