耐火材料
耐火材料
내화재료
REFRACTORIES
2014年
4期
275-277,281
,共4页
屈源超%杨道媛%冯晓聪%马旻晓
屈源超%楊道媛%馮曉聰%馬旻曉
굴원초%양도원%풍효총%마민효
没食子酸正丙酯(PG)%氧化铝多孔陶瓷%冷冻干燥
沒食子痠正丙酯(PG)%氧化鋁多孔陶瓷%冷凍榦燥
몰식자산정병지(PG)%양화려다공도자%냉동간조
propyl gallate%porous alumina ceramics%freeze drying
为了提高泡沫陶瓷浆料的稳定性,进而制备出高孔隙率的泡沫陶瓷,采用没食子酸正丙脂(PG)修饰α-Al2 O3微粉颗粒,使其具有部分疏水性,采用发泡-冷冻干燥法制备了Al2 O3多孔陶瓷材料,主要研究了PG加入量(w,0.1%~2.0%)、料浆固含量(w,49.0%~61.9%)和烧成温度(1300~1500℃)对Al2O3多孔陶瓷材料性能的影响。结果表明:以没食子酸正丙脂(PG)作修饰剂,对α-Al2 O3微粉颗粒稳定气泡有良好的作用;当PG加入量为1.5%(w),固含量为58%(w),烧成温度为1500℃时,制备的Al2 O3多孔陶瓷材料的显气孔率为72%,体积密度为0.59 g·cm-3,耐压强度为12.5 MPa。
為瞭提高泡沫陶瓷漿料的穩定性,進而製備齣高孔隙率的泡沫陶瓷,採用沒食子痠正丙脂(PG)脩飾α-Al2 O3微粉顆粒,使其具有部分疏水性,採用髮泡-冷凍榦燥法製備瞭Al2 O3多孔陶瓷材料,主要研究瞭PG加入量(w,0.1%~2.0%)、料漿固含量(w,49.0%~61.9%)和燒成溫度(1300~1500℃)對Al2O3多孔陶瓷材料性能的影響。結果錶明:以沒食子痠正丙脂(PG)作脩飾劑,對α-Al2 O3微粉顆粒穩定氣泡有良好的作用;噹PG加入量為1.5%(w),固含量為58%(w),燒成溫度為1500℃時,製備的Al2 O3多孔陶瓷材料的顯氣孔率為72%,體積密度為0.59 g·cm-3,耐壓彊度為12.5 MPa。
위료제고포말도자장료적은정성,진이제비출고공극솔적포말도자,채용몰식자산정병지(PG)수식α-Al2 O3미분과립,사기구유부분소수성,채용발포-냉동간조법제비료Al2 O3다공도자재료,주요연구료PG가입량(w,0.1%~2.0%)、료장고함량(w,49.0%~61.9%)화소성온도(1300~1500℃)대Al2O3다공도자재료성능적영향。결과표명:이몰식자산정병지(PG)작수식제,대α-Al2 O3미분과립은정기포유량호적작용;당PG가입량위1.5%(w),고함량위58%(w),소성온도위1500℃시,제비적Al2 O3다공도자재료적현기공솔위72%,체적밀도위0.59 g·cm-3,내압강도위12.5 MPa。
To enhance the stabilization of foam ceramic slurries and prepare foam ceramics with high porosi-ty,the porous Al2 O3 ceramics were prepared by foaming-freeze drying method using propyl gallate (PG) modified α-Al2 O3 micropowder with partial hydrophobicity.Effects of PG addition (0.1%-2.0%,in mass, the same hereinafter),slurry solid content (49.0%-61.9%)and firing temperature (1 300-1 500 ℃)on properties of porous Al2 O3 ceramics were researched.The results show that PG modified the α-Al2 O3 mi-cropowder and well stabilizes the pores;when PG addition is 1.5%and solid content is 58%,the apparent porosity,bulk density and crushing strength of the prepared ceramics fired at 1 500 ℃ are 72%,0.59 g·cm -3 and 12.5 MPa,respectively.