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
Samples of binary reinforced composites were created by mixing varying fractions of palm fiber (20, 30, 40, and 50 weight %) in a phenoformaldehyde (PF) matrix. The thermal conductivity and thermal diffusivity were measured using Transient Plane Source equipment. The team discovered that the thermal conductivity and thermal diffusivity of the composites decreased as the amount of palm fiber increased....
Author(s): K. B. Sharma, M. S. Sreekala, N. S. Saxena, N. S. Sharma, Richa Agrawal, S. Thomas
Phenolic resin impregnation was combined with liquid silicon infiltration to create a carbon/silicon carbide composite. The potential application for this material is in disc brakes in vehicles due to their oxidation resistance and friction behaviour. The density of the composite was altered until a final value of 2.10g/cm3 was achieved. The thermal conductivity of the composite was measured using the TPS method, and was determined to be 48.72 W/...
Author(s): Bin Li, Laifei Cheng, Lin Yu, Litong Zhang, Shangwu Fan, Yanzhi Cai, Yongdong Xu
This article discusses the creation and characterization of albumin based rigid and elastic foams. These foams were created using formaldehyde as the hardener for the protein, while camphor was used as the plasticizer. Crosslinking was carried out using a traditional or microwave oven. Samples differed in the amount of water, formaldehyde, and camphor added, and in the amount of time that they spent in the oven. The thermal conductivity was ...
Author(s): Alain Celzard, Antonio Pizzi, C. Segovia, M. Cangemi, P. Navarrete, V. Fierro, X. Li
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
