Electrical Properties of Nitrogen-Doped Pressureless Sintered SiC.

Microstructure and mechanical properties of pressureless sintered alumina-silver composites

The silver toughened alumina ceramics, which were fabricated via a conventional ceramic processing route using commercially available alumina and silver oxide powders as the starting materials, exhibit a higher fracture toughness (6 to 9 MPamo.5) than the monolithic alumina ceramic ( 2.5 to 3.0 MPamo.5). The weak interfacial bonding between the silver inclusions and the alumina matrix is charac...

Electrical Properties Of Nitrogen Doped Amorphous Carbon Films Fromethanol Precursor

The nitrogen doped amorphous carbon (a-C:N) thin films were synthesized for the first time by using mixing of nitrogen gas, argon and ethanol precursor by bias assisted pyrolysis-CVD in the range of 250 o C to 550 o C with fixed negative bias of -50V in 1h deposition. The a-C:Nthin films were characterized by current-voltage measurement, UV/VIS spectrophotometer, surface profiler, and atomic fo...

The effect of powder type and CaO additive on properties of sintered SiC by pressureless sintering in additive system of Al2O3-Y2O3-CaO

In this study, the effect of two types of SiC powders consist of SiC-1 (β-SiC) and SiC-2 (β-SiC+α-SiC) and also different values of CaO additive consist of 0, 0.4 and 0.8 weight percent on sintering behavior of sintered SiC with pressureless technique in Al2O3-Y2O3-CaO additive system  was investigated. In all specimens, Al2O3:Y2O3 molar ratio was equal to 3:2 and all amounts of additive were e...

Electrical Properties of Unintentionally Doped Semi-Insulating and Conducting 6H-SiC

Nitrogen content and morphology dependent field emission properties of nitrogen-doped SiC nanowires and density functional calculations.

Nitrogen-doped SiC nanowires (N-doped SiC NWs) with a nitrogen content from 0.975 wt% to 2.265 wt% have been synthesized via a one-step chemical vapor reaction (CVR), where melamine served as both the carbon and nitrogen source. Interestingly, the morphology of the products changed from slightly curled to very curled with crowding together with the increase of N dopants, which was interpreted r...