中国有色金属学报
中國有色金屬學報
중국유색금속학보
THE CHINESE JOURNAL OF NONFERROUS METALS
2015年
1期
171-178
,共8页
戴乐阳%张宝剑%林少芬%刘志杰%王文春
戴樂暘%張寶劍%林少芬%劉誌傑%王文春
대악양%장보검%림소분%류지걸%왕문춘
Al2O3%等离子体辅助球磨%活化%碳热还原反应%AlN
Al2O3%等離子體輔助毬磨%活化%碳熱還原反應%AlN
Al2O3%등리자체보조구마%활화%탄열환원반응%AlN
Al2O3%plasma assisted ball milling%activation%carbothermic reduction reaction%AlN
利用介质阻挡放电等离子体辅助球磨和普通球磨分别对Al2O3粉末进行活化，研究等离子体辅助球磨活化Al2O3合成AlN的碳热还原反应机制。结果表明：等离子体辅助球磨40 h的Al2O3粉末，在N2气氛中于1400℃下保温4 h可以完成碳热还原反应，全部转化为AlN。经等离子体辅助球磨后，Al2O3的碳热还原反应符合气相反应机制，等离子体辅助球磨活化大大降低Al2O3的后续反应温度，辅助球磨40 h后的Al2O3合成AlN的反应激活能下降到371.5 kJ/mol。等离子体的协同效应促使辅助球磨中Al2O3晶体产生更严重的晶格畸变，这是激活 Al2O3并促进碳热还原反应的一个重要因素。
利用介質阻擋放電等離子體輔助毬磨和普通毬磨分彆對Al2O3粉末進行活化，研究等離子體輔助毬磨活化Al2O3閤成AlN的碳熱還原反應機製。結果錶明：等離子體輔助毬磨40 h的Al2O3粉末，在N2氣氛中于1400℃下保溫4 h可以完成碳熱還原反應，全部轉化為AlN。經等離子體輔助毬磨後，Al2O3的碳熱還原反應符閤氣相反應機製，等離子體輔助毬磨活化大大降低Al2O3的後續反應溫度，輔助毬磨40 h後的Al2O3閤成AlN的反應激活能下降到371.5 kJ/mol。等離子體的協同效應促使輔助毬磨中Al2O3晶體產生更嚴重的晶格畸變，這是激活 Al2O3併促進碳熱還原反應的一箇重要因素。
이용개질조당방전등리자체보조구마화보통구마분별대Al2O3분말진행활화，연구등리자체보조구마활화Al2O3합성AlN적탄열환원반응궤제。결과표명：등리자체보조구마40 h적Al2O3분말，재N2기분중우1400℃하보온4 h가이완성탄열환원반응，전부전화위AlN。경등리자체보조구마후，Al2O3적탄열환원반응부합기상반응궤제，등리자체보조구마활화대대강저Al2O3적후속반응온도，보조구마40 h후적Al2O3합성AlN적반응격활능하강도371.5 kJ/mol。등리자체적협동효응촉사보조구마중Al2O3정체산생경엄중적정격기변，저시격활 Al2O3병촉진탄열환원반응적일개중요인소。
The synthesis mechanism of AlN by Al2O3powders through carbothermic reduction reaction was investigated, in which the Al2O3powders was activated by plasma assisted ball milling (PM) or by conventional ball milling (CM). The results indicate that Al2O3powders activated by plasma assisted ball milling for 40 h can be converted to AlN totally through carbothermic reduction reaction when annealed at 1400℃ for 4h in N2. It is gas reaction mechanism for the carbothermic reduction reaction of Al2O3powders after plasma assisted ball milling. The subsequent reaction temperature of Al2O3powders is reduced significantly because the reaction activation energy decreases to 371.5 kJ/mol after plasma assisted ball milling for 40 h. A lot of lattice distortions are generated in Al2O3graindue to the cooperation of plasma and ball milling, which is an important factor for promoting the carbothermic reduction reaction of Al2O3powders activated by plasma assisted ball milling.
