CAJ | 학술논문

以纳米γ-Al2 O3和活性炭为原料，采用碳热还原法合成AlON 粉体，研究原料粉末在行星式球磨机上的球磨时间对合成粉体物相组成的影响规律。结果表明，在2~24 h内混合原料粉末时，延长原料粉末的球磨时间可有效细化活性炭，提高混合粉末的比表面积，提高 Al2 O3和活性炭混合的均匀性，有利于纯相AlON粉体的合成，而对于球磨时间较短的原料粉末，可以通过提高烧结温度或延长保温时间促进AlON相形成。经24 h球磨的原料粉末在1750℃碳热还原60 min获得的纯相AlON粉体，在1880℃无压烧结制备了最大红外透过率为81%的 AlON 透明陶瓷(3 mm厚样品)。
이납미γ-Al2 O3화활성탄위원료，채용탄열환원법합성AlON 분체，연구원료분말재행성식구마궤상적구마시간대합성분체물상조성적영향규률。결과표명，재2~24 h내혼합원료분말시，연장원료분말적구마시간가유효세화활성탄，제고혼합분말적비표면적，제고 Al2 O3화활성탄혼합적균균성，유리우순상AlON분체적합성，이대우구마시간교단적원료분말，가이통과제고소결온도혹연장보온시간촉진AlON상형성。경24 h구마적원료분말재1750℃탄열환원60 min획득적순상AlON분체，재1880℃무압소결제비료최대홍외투과솔위81%적 AlON 투명도자(3 mm후양품)。
Using nano-sizedγ-Al2 O3 and activated carbon as starting powders,AlON powders were synthesized by carbothermal reduction and nitridation (CTRN)method.The mixture powders were ball milled in a planeta-ry grinder,and effects of milling time on phase assemblages of products were approached.The results revealed that longer milling time contributed to the refinement of carbon,more homogeneous mixture powders with higher specific area was prepared after 24 h milling.The fine and homogeneous mixture powders were benefit for the synthesis of pure phase AlON powder.However,for the powders milled in a shorter time,to raise sin-tering temperature or elongate holding time could also promote AlON phase formation.By pressless sintering the AlON powder prepared at 1 750 ℃ for 60 min using the mixed powders of milling for 24 h,transparent AlON ceramics with maximum transmittance of 81% (3 mm in thickness)were fabricated at 1 880 ℃.