采用粒度≤74 μm、ω( MgCO3) =98.84％的工业纯菱镁矿,粒度＜74 μm、ω(MgO)为40.0％ ～44.5％的分析纯碱式碳酸镁Mg(OH)2·4MgCO3·5H2O,以及粒度≤74 μm、ω(A1)≥99.9％的金属铝粉为原料,按照n(MgCO3):n(Al) =3:4和n[Mg(OH)2· 4MgCO3·5H2O]:n(Al) =3:28分别配料,采用机械合金化法,在室温条件下,以240 r·min-1的转速分别研磨15、30、50 h制得尖晶石-碳复合粉体.采用XRD分析、差热-热重分析和拉曼光谱等手段对复合粉体进行表征.结果表明:经过15 ～50 h的研磨后,两个反应体系中碳酸盐与金属铝粉之间发生原位分解和还原反应,都生成了尖晶石和碳;产物碳具有一定的石墨化程度,并与研磨时间密切相关;菱镁矿与金属铝粉之间生成尖晶石和碳的反应比碱式碳酸镁的快.
参考文献
| [1] | Evans R M .Raw materials production and preparation[J].American Ceramic Society Bulletin,1993,72(04):1109-1112. |
| [2] | 陈路兵;李广平;田守信 .烧结法制备高纯镁铝尖晶石[J].硅酸盐通报,1995,14(02):4-7. |
| [3] | 田忠凯,王周福,王玺堂,张保国.稀土氧化物对反应烧结合成镁铝尖晶石的影响[J].耐火材料,2008(05):326-329. |
| [4] | Wang C T;Lin L S .Preparation of MgAl2O4 spinel powders via freeze-drying of alkoxide precursors[J].Journal of the American Ceramic Society,1992,75(08):2240-2243. |
| [5] | 仝建峰,周洋,杜林虎,陈大明.凝胶固相反应法制备镁铝尖晶石微粉的研究[J].航空材料学报,2000(03):144-147. |
| [6] | Haijun Zhang;Xiaolin Jia;Zhanjie Liu .The low temperature preparation of nanocrystalline MgAl_2O_4 spinel by citrate sol-gel process[J].Materials Letters,2004(10):1625-1628. |
| [7] | 马亚鲁 .化学共沉淀法制备镁铝尖晶石粉末的研究[J].无机盐工业,1998,30(01):3-4. |
| [8] | 李军,周晓奇,宋志安,王有坤,霍尚义.水热法制备镁铝尖晶石载体[J].工业催化,2003(10):44-49. |
| [9] | Tamura S;Ochiai T;Takanaga S.Nano-Tech.Refractories (1):The development of the nano structural matrix[A].Osaka,Japan,2003:517-520. |
| [10] | Kido N;Yamamoto K;Kamiide M.Carbon nanofiber—A new trial for magnesia based bricks[A].Osaka,Japan,2003:264-267. |
| [11] | Takanaga S;Fujiwara Y;Hatta M.Nano-Tech.Refractories 3:Development of MgO-rimmed MgO-C brick[A].Orlando(USA),2005:148-151. |
| [12] | Inoue M;Yamamoto T;Hirota K et al.Development and use of ultra-low carbon MgO-C nano technology Refractories[J].Taikabutsu Overseas,2006,26(03):238-241. |
| [13] | Q.-m. Gong;Z. Li;X.-w. Zhou .Synthesis and characterization of in situ grown carbon nanofiber/nano-tube reinforced carbon/carbon composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,2005(11):2426-2429. |
| [14] | Flahaut E.;Peigney A. .CARBON NANOTUBE-METAL-OXIDE NANOCOMPOSITES: MICROSTRUCTURE, ELECTRICAL CONDUCTIVITY AND MECHANICAL PROPERTIES[J].Acta materialia,2000(14):3803-3812. |
| [15] | Benjamin J S .Dispersion strengthened superalloys by mechanical alloying[J].Metallurgical and Materials Transactions,1970,1(10):2943-2951. |
| [16] | 王新庆,王淼,李振华,朱海滨,王凤飞.单壁纳米碳管的纯化及表征[J].物理化学学报,2003(05):428-431. |
| [17] | I.W.Chiang;B.E.Brinson;R.E.Smalley;J.L.Margrave;R.H.Hauge .Purification and Characterization of Single-Wall Carbon Nanotubes[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2001(6):1157-1161. |
| [18] | Shi ZJ.;Liao FH.;Zhou XH.;Gu ZN.;Zhang Y.;Iijima S.;Li HD. Yue KT.;Zhang SL.;Lian YF. .Large scale synthesis of single-wall carbon nanotubes by arc-discharge method[J].The journal of physics and chemistry of solids,2000(7):1031-1036. |
| [19] | 毕辉,寇开昌,王召娣,王志超,张教强.微螺旋炭纤维的制备、微观结构及性能[J].人工晶体学报,2008(02):384-387,304. |
| [20] | 邹正光,李金莲,陈寒元.高能球磨在复合材料制备中的应用[J].桂林工学院学报,2002(02):174-178. |
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