Non-catalytic vapor synthesis of α-Si3N4 nanowhiskers via direct nitridation of silicon powders
Source abstract
Abstract
Abstract Single crystalline α-Si3N4 nanowhiskers were synthesized by direct nitridation of the NH3-pretreated silicon powders under N2/H2 atmosphere without adding any catalysts. The phase composition and microstructure of the as-obtained products were investigated. It is shown that the NH3 pretreatment has a great influence on the phase and microstructure of the products. With NH3 pretreatment, single crystalline α-Si3N4 nanowhiskers were obtained. Whereas, the dominant β-Si3N4 particles were formed without NH3 pretreatment. The isolated α-Si3N4 crystal nuclei and the relatively thick oxide layer were formed on the surface of the silicon particles after pretreating by NH3. The growth of the α-Si3N4 nanowhiskers is obeyed the vapor-solid (VS) mechanism.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · MXene and MAX Phase Materials · Semiconductor materials and devices
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References (16)
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