Synthesis and characterization of SiC/Si 3 N 4 composites from rice husks
CERAMICS INTERNATIONAL(2018)
摘要
SiC-Si3N4 composites have been obtained by carbothermal reduction of rice husk under a nitrogen-argon atmosphere at 1450 degrees C, which is a lower temperature than those used by other authors. On the other hand, tailoring the argon/nitrogen ratio led to the obtained of SiC-Si3N4 composites across the whole range of compositions. Phosphoric acid treatment permited the synthesis of the composite without a pyrolysis step. The final products were characterized by X-ray diffractometry, IR spectroscopy and scanning electron microscopy.
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关键词
Rice husk,Carbothermal reduction,Composite,Phosphoric acid
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