耐火材料
耐火材料
내화재료
REFRACTORIES
2015年
1期
27-30
,共4页
马渭奎%刘国齐%杨文刚%钱凡%于建宾%马天飞
馬渭奎%劉國齊%楊文剛%錢凡%于建賓%馬天飛
마위규%류국제%양문강%전범%우건빈%마천비
Al-TiO2 复合粉体%Al2 O3-C 材料%抗热震性
Al-TiO2 複閤粉體%Al2 O3-C 材料%抗熱震性
Al-TiO2 복합분체%Al2 O3-C 재료%항열진성
aluminum -titanium dioxide composite powders%alumina -carbon refractories%thermal shock resistance
首先，以 Al 粉和钛白粉（TiO2）为原料，分别采用凝胶注模法、普通混合法和振动球磨法制备成m（Al 粉）∶m（TiO2粉）＝1∶3．5的 Al－TiO2复合粉，然后分别将这三种 Al－TiO2复合粉按5％（w）的比例引入Al2 O3－C 材料中，以120 MPa 压力等静压成型为25 mm ×25 mm ×170 mm 的试样，然后在埋炭（焦炭）条件下于1300℃保温3 h 热处理，研究了 Al－TiO2复合粉对 Al2 O3－C 材料物理性能、抗热震性能和显微结构的影响。结果表明：在 Al2 O3－C 材料中添加 Al－TiO2复合粉体能降低其显气孔率，提高其常温抗折强度和抗热震性，并以凝胶注模法制备的复合粉体的改善效果最明显；Al－TiO2复合粉体在 Al2 O3－C 材料中反应后生成内壁为致密陶瓷相的封闭孔洞；凝胶注模法制备的 Al－TiO2复合粉体中，TiO2粉能更充分地包裹金属 Al 粉，防止 Al 粉与Al2 O3－C 材料中的 C 反应，减少 Al4 C3的生成。
首先，以 Al 粉和鈦白粉（TiO2）為原料，分彆採用凝膠註模法、普通混閤法和振動毬磨法製備成m（Al 粉）∶m（TiO2粉）＝1∶3．5的 Al－TiO2複閤粉，然後分彆將這三種 Al－TiO2複閤粉按5％（w）的比例引入Al2 O3－C 材料中，以120 MPa 壓力等靜壓成型為25 mm ×25 mm ×170 mm 的試樣，然後在埋炭（焦炭）條件下于1300℃保溫3 h 熱處理，研究瞭 Al－TiO2複閤粉對 Al2 O3－C 材料物理性能、抗熱震性能和顯微結構的影響。結果錶明：在 Al2 O3－C 材料中添加 Al－TiO2複閤粉體能降低其顯氣孔率，提高其常溫抗摺彊度和抗熱震性，併以凝膠註模法製備的複閤粉體的改善效果最明顯；Al－TiO2複閤粉體在 Al2 O3－C 材料中反應後生成內壁為緻密陶瓷相的封閉孔洞；凝膠註模法製備的 Al－TiO2複閤粉體中，TiO2粉能更充分地包裹金屬 Al 粉，防止 Al 粉與Al2 O3－C 材料中的 C 反應，減少 Al4 C3的生成。
수선，이 Al 분화태백분（TiO2）위원료，분별채용응효주모법、보통혼합법화진동구마법제비성m（Al 분）∶m（TiO2분）＝1∶3．5적 Al－TiO2복합분，연후분별장저삼충 Al－TiO2복합분안5％（w）적비례인입Al2 O3－C 재료중，이120 MPa 압력등정압성형위25 mm ×25 mm ×170 mm 적시양，연후재매탄（초탄）조건하우1300℃보온3 h 열처리，연구료 Al－TiO2복합분대 Al2 O3－C 재료물이성능、항열진성능화현미결구적영향。결과표명：재 Al2 O3－C 재료중첨가 Al－TiO2복합분체능강저기현기공솔，제고기상온항절강도화항열진성，병이응효주모법제비적복합분체적개선효과최명현；Al－TiO2복합분체재 Al2 O3－C 재료중반응후생성내벽위치밀도자상적봉폐공동；응효주모법제비적 Al－TiO2복합분체중，TiO2분능경충분지포과금속 Al 분，방지 Al 분여Al2 O3－C 재료중적 C 반응，감소 Al4 C3적생성。
Using Al powder and titanium dioxide powder as raw materials,Al-TiO2 composite powders with m(Al powder)m(TiO2 powder)=1 3.5 were synthesized by gel casting,normal mixing and vibration ball milling,respectively.The three 5 mass% Al-TiO2 composite powders were introduced into Al2 O3-C materi-als,respectively.Specimens with size of 25 mm ×25 mm ×170 mm were formed by an isostatic press at pressure of 120 MPa and then were fired at 1 300 ℃ for 3 h embedded with coke.The effects of the three composite powders on the physical properties,thermal shock resistance and microstructure of specimens were studied.The results show that adding the Al-TiO2 composite powder in Al2 O3 -C materials can de-crease the apparent porosity,and improve the cold modulus of rupture and thermal shock resistance;the effect of the one prepared by gel casting is the most obvious;Al-TiO2 composite powder reacts in Al2 O3-C materials generating closed pores with dense ceramic inner walls;in the Al-TiO2 composite powder pre-pared by gel casting,TiO2 powder can more fully encapsulate metal Al powder,preventing the reaction be-tween Al and carbon and reducing the production of Al4 C3 .
