Carbothermal reduction of alumina into aluminium oxynitride(AlON) spinel in a flowing nitrogen atmosphere was studied.The effects of Al2O3/C ratio temperature,soaking time,heating rate molding pressure of samples,and ...Carbothermal reduction of alumina into aluminium oxynitride(AlON) spinel in a flowing nitrogen atmosphere was studied.The effects of Al2O3/C ratio temperature,soaking time,heating rate molding pressure of samples,and nitrogen flow rate on reactions were investigated.Then the stability of AlON was elucidated and AlON wa confirmed as an intermediate compound in reduction of alumina.展开更多
The reduction of carbon/alumina powder mixture in a flowing nitrogen stream was inve-tigated by the quantitiative analysis of X-ray diffraction.Experimental results indicated that the reaction rate could be increased ...The reduction of carbon/alumina powder mixture in a flowing nitrogen stream was inve-tigated by the quantitiative analysis of X-ray diffraction.Experimental results indicated that the reaction rate could be increased by increasing the nitrogen flow rate ,or treating temperature,The rate was also found to be increased by decreasing the alumina particle size and initial bulk density,And the calcined alumina was sup-posed to be the suitable source of aluminum ox-ide compared with the other types of alumina.The final powder product of AlN was observed by SEM and analyzed by a prticle-size analyzer.展开更多
文摘Carbothermal reduction of alumina into aluminium oxynitride(AlON) spinel in a flowing nitrogen atmosphere was studied.The effects of Al2O3/C ratio temperature,soaking time,heating rate molding pressure of samples,and nitrogen flow rate on reactions were investigated.Then the stability of AlON was elucidated and AlON wa confirmed as an intermediate compound in reduction of alumina.
文摘The reduction of carbon/alumina powder mixture in a flowing nitrogen stream was inve-tigated by the quantitiative analysis of X-ray diffraction.Experimental results indicated that the reaction rate could be increased by increasing the nitrogen flow rate ,or treating temperature,The rate was also found to be increased by decreasing the alumina particle size and initial bulk density,And the calcined alumina was sup-posed to be the suitable source of aluminum ox-ide compared with the other types of alumina.The final powder product of AlN was observed by SEM and analyzed by a prticle-size analyzer.
