Effective heat dissipation has become a critical issue for electronic devices. In this study, the silicone rubber (SR)/vertically aligned boron nitride (BN) composites were prepared and the thermal conductivity of the composites was systematically investigated. The vertically aligned BNs constructed effective vertical thermal conductive pathways in...
Effective heat dissipation has become a critical issue for electronic devices. In this study, the silicone rubber (SR)/vertically aligned boron nitride (BN) composites were prepared and the thermal conductivity of the composites was systematically investigated. The vertically aligned BNs constructed effective vertical thermal conductive pathways in...
Polymers in transport, and many other engineering applications, are required to be mechanically tough as well as resistant to ignition and flame spread. These demands are often for many polymer types in competition, especially when adding flame retardants. With nano-silica addition, we show that improvements in both properties of a polymer can be a...
In this paper, single-crystalline alpha-Si3N4 nanospheres with uniform size of similar to 50 nm are successfully synthesized by using a radio frequency (RF) thermal plasma system in a one-step and continuous way. All Si3N4 nanoparticles present nearly perfect spherical shape with a narrow size distribution, and the diameter is well-controlled by c...
Purpose: To evaluate the use of orbital polyacrylamide gel injection for the correction of anophthalmic enophthalmos. Methods: Noncontrolled clinical trial of 21 patients (14 with ocular implants, 5 with phthisis bulbi, and 2 with dermis-fat graft). Orbital CT was performed to estimate the volume of polyacrylamide gel needed to restore orbital volu...
Purpose: To evaluate the use of orbital polyacrylamide gel injection for the correction of anophthalmic enophthalmos. Methods: Noncontrolled clinical trial of 21 patients (14 with ocular implants, 5 with phthisis bulbi, and 2 with dermis-fat graft). Orbital CT was performed to estimate the volume of polyacrylamide gel needed to restore orbital volu...
Polymer composites with graphite additives are often used to control sliding properties. The lubricating action of graphite, however, strongly depends on the working conditions of normal load and sliding velocity. Sintered polyimide with 15 wt.-% graphite powders is worn under 50 to 200 N normal loads and 0.3 to 1.2 m/s sliding velocities in line c...
Germany
The SiO2 interlayer dielectric is being replaced by new low k spin-on or vapour-deposited silicate or organic materials. Important synthetic goals are the controlled catalytic hydrosilylation of H8Si8O12, T8H, (HSiMe2O)8Si8O12, Q8M8H with 1,5-hexadiene and hydrolytic condensation of monomers. The result of dielectric measurement showed that the die...
