不同含铝微粉对原位莫来石结合SiC多孔陶瓷膜支撑体性能的影响
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摘要
为降低陶瓷膜支撑体的制作成本,以SiC颗粒为骨料,分别以α-Al_2O_3微粉、ρ-Al_2O_3微粉以及Al(OH)3粉作为莫来石相的铝源,利用烧结过程中Si C微粉表面氧化产生的SiO2作为硅源,以木炭粉为造孔剂,碱式碳酸镁作为助烧结剂,于1 350℃保温3 h在空气气氛下无压烧结制备原位莫来石结合SiC多孔陶瓷膜支撑体试样,并研究了三种不同含铝微粉对试样性能的影响。结果表明:经1 350℃烧后,采用活性ρ-Al_2O_3微粉结合的试样抗折强度达到19. 9 MPa,分别高于采用α-Al_2O_3和Al(OH)3结合试样的51. 1%和33. 5%。SEM及XRD分析表明,添加活性ρ-Al_2O_3微粉的试样内部颗粒之间的颈部结合程度最好,原位生成的莫来石相最多。
This work aims at reducing the production cost of ceramic membrane support. In-situ mullitebonded silicon carbide porous ceramic membrane support specimens were fabricated using Si C particles as aggregates,α-Al_2O_3 micropowder,ρ-Al_2O_3 micropowder and Al( OH)3 powder as the aluminum resource,SiO_2 generated from the surface oxidation of Si C micropowder during sintering as the silicon source,charcoal powder as the pore forming agent,basic magnesium carbonate as the sintering aid,and pressureless sintering at 1 350 ℃ for 3 h in air. Effects of different alumina-containing micropowders on properties of the specimens were investigated. The results show that the flexural strength of the specimen with ρ-Al_2O_3 micropowder reaches 19. 9 MPa,51. 1% and 33. 5% higher than those of the specimens withα-Al_2O_3 and Al( OH)_3,respectively. The SEM and XRD analysis shows that the neck bonding between the particles in the specimen with active ρ-Al_2O_3 as the aluminum source is the best,in-situ forming the most mullite phase.
This work aims at reducing the production cost of ceramic membrane support. In-situ mullitebonded silicon carbide porous ceramic membrane support specimens were fabricated using Si C particles as aggregates,α-Al_2O_3 micropowder,ρ-Al_2O_3 micropowder and Al( OH)3 powder as the aluminum resource,SiO_2 generated from the surface oxidation of Si C micropowder during sintering as the silicon source,charcoal powder as the pore forming agent,basic magnesium carbonate as the sintering aid,and pressureless sintering at 1 350 ℃ for 3 h in air. Effects of different alumina-containing micropowders on properties of the specimens were investigated. The results show that the flexural strength of the specimen with ρ-Al_2O_3 micropowder reaches 19. 9 MPa,51. 1% and 33. 5% higher than those of the specimens withα-Al_2O_3 and Al( OH)_3,respectively. The SEM and XRD analysis shows that the neck bonding between the particles in the specimen with active ρ-Al_2O_3 as the aluminum source is the best,in-situ forming the most mullite phase.
引文
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[22]崔香枝,贾晓林,钟香崇.氢氧化铝热分解制备α-Al2O3纳米粉体[J].耐火材料,2006,40(5):353-357.
[2] VOGT U F,GYRFY L,HERZOG A,et al. Macroporous silicon carbide foams for porous burner applications and catalyst supports[J]. J Phys Chem Solids,2007,68(5):1234-1238.
[3]尚俊玲,陈维平,刘城,等.助烧剂和造孔剂对真空烧结Si C多孔陶瓷性能的影响[J].耐火材料,2006,40(6):450-452.
[4]尹月,马北越,张博文,等.非氧化物多孔陶瓷的研究进展[J].耐火材料,2016,50(3):233-240.
[5] GMEZ-MARTN A,ORIHUELA M P,BECERRA J A,et al. Permeability and mechanical integrity of porous biomorphic SiC ceramics for application as hot-gas filters[J]. Mater Design,2016,107:450-460.
[6] CARVALHO A C,RAUPP-PEREIRA F,RODRIGUES NETO J B,et al. A new source for production of ceramic filters[J]. Mater Lett,2015,145:250-252.
[7]任鑫明,马北越,张亚然,等.煅烧温度对聚合物模板法制备Si C-Al2O3多孔陶瓷性能的影响[J].耐火材料,2018,52(3):196-198.
[8] ALVIN M A. Advanced ceramic materials for use in high-temperature particulate removal systems[J]. Ind Eng Chem Res,1996,35(10):3384-3398.
[9] ALVIN M A,LIPPERT T E,LANE J E. Assessment of porous ceramic materialsfor hot gas filtration applications[J]. Am Ceram Soc Bull,1991,70(9):1491-1498.
[10] HEIDENREICH S,WOLTERS C. Hot gas filter contributes to IGCC power plant's reliable operation[J]. Filtr Sep,2004,41(5):22-24.
[11]李俊峰,林红,李建保,等.高温过滤支撑体用Si C基多孔陶瓷的制备与表征[J].稀有金属材料与工程,2009,38(2):122-125.
[12] LIU K Q,LUO Z Y,KANG F,et al. Shape and distribution of pores in SiC ceramic membrane supports formed by extrusion molding[J]. Key Eng Mater,2016,680(453):99-102.
[13] SHE J H,DENG Z Y,DONI J D,et al. Oxidation bonding of porous silicon carbide ceramics[J]. J Mater Sci,2002,37(17):3615-3622.
[14]白佳海.碳化硅-堇青石多孔陶瓷的制备及其性能[J].耐火材料,2006,40(4):291-293.
[15] LOPEZ H F,PHOOMIPHAKDEEPHAN W. High temperature oxidation of nitride bonded SiC-ceramics[J]. Mater Lett,1998,36(1-4):65-69.
[16] SONG I H,PARK M J,KIM H D,et al. Microstructure and permeability property of Si bonded porous SiC with variations in the carbon content[J]. J Korean Ceram Soc,2010,47(6):546-552.
[17] CHAE S H,KIM Y W,SONG I H,et al. Low temperature processing and properties of porous frit-bonded SiC ceramics[J]. J Korean Ceram Soc,2009,46(5):488-492.
[18]韩磊,邓先功,王军凯,等. Si C复相多孔陶瓷的研究进展[J].耐火材料,2017,51(3):227-234.
[19] DING S Q,ZHU S M,ZENG Y P,et al. Effect of Y2O3addition on the properties of reaction-bonded porous SiC ceramics[J]. Ceram Int,2006,32(4):461-466.
[20]陈玮,姚长江,尹周澜,等.ρ-Al2O3的水化特性研究[J].耐火材料,2008,42(4):271-273.
[21]李晓明,吴清顺,祝洪喜.ρ-Al2O3水化机理的热力学研究[J].硅酸盐通报,1997,16(4):34-38.
[22]崔香枝,贾晓林,钟香崇.氢氧化铝热分解制备α-Al2O3纳米粉体[J].耐火材料,2006,40(5):353-357.