An experimental study was conducted to improve the electrical insulation of epoxy resin. The effects of boehmite, gamma-alumina and alpha-alumina nanoparticles on the volume resistivity, dielectric strength and glass transition temperature of epoxy nanocomposites were investigated. The results showed that alpha-alumina nanoparticles displayed obvio...
An experimental study was conducted to improve the electrical insulation of epoxy resin. The effects of boehmite, gamma-alumina and alpha-alumina nanoparticles on the volume resistivity, dielectric strength and glass transition temperature of epoxy nanocomposites were investigated. The results showed that alpha-alumina nanoparticles displayed obvio...
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...
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...
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...
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...
