Scale up of microwave sintering for high temperature stable non-oxide ceramics, such as SiC, Si3N4, and dispersion ceramics, like SiC-MoSi2 is still difficult, mainly because of lack of an affordable equipment. For air atmosphere sintering different furnaces were developed, like e.g., gas-microwave hybrid heated tunnel kilns [1] or microwave sintering using an adiabatic casket in tunnel kilns [...

PURPOSE The purpose of this study was to compare the optical properties of pre-colored dental monolithic zirconia ceramics of various thicknesses sintered in a microwave and those in a conventional furnace. MATERIALS AND METHODS A2-shade of pre-colored monolithic zirconia ceramic specimens (22.0 mm × 22.0 mm) in 3 thickness groups of 0.5, 1.0, and 1.5 mm were divided into 2 subgroups accordin...

To investigate the effect of sintering temperature and sintering time on arsenic volatility and arsenic leaching in the sinter, we carried out experimental works and studied the structural changes of mineral phases and microstructure observation of the sinter at different sintering temperatures. Raw materials were shaped under the pressure of 10 MPa and sintered at 1000~1350°C for 45 min with a...

Sintering of supported metal catalysts is of primary interest in heterogeneous catalysis. The presence of reactant gases, especially oxidants, often accelerates the sintering of supported metal catalysts. Our in situ studies using scanning tunneling microscopy (STM) compare the sintering of Au particles supported on TiO2(110) in the presence of CO, O2, or mixtures of the two gases. The results ...

this paper presents a new method to reduce consumption power in flash adc in 65nm cmos technology. this method indicates a considerable reduction in consumption power, by removing comparators memories. the simulations used a frequency of 1 ghz, resulting in decreased consumption power by approximately 90% for different processing corners. in addition, in this paper the proposed method was desig...

background : postmenopausal hot flash is a common disease amongst women with high prevalence of 75%. hormone replacement therapy (hrt) is a well-known relief of symptoms which has disadvantages such as side effects and contraindication for certain types of hormone related diseases and breast or estrogen related cancers. one of the alternatives is acupuncture which is an east asian and more spec...