以尿素催化硅酸乙酯水解制得SiO2溶胶.采用29Si NMR、27Al NMR、FT-IR、TEM、DTA、XRD和SEM等对SiO2溶胶、Al2O3凝胶纤维化学结构和微观结构研究结果表明,该SiO2溶胶稳定性好,含有大量的单硅酸Si(OH)4,能和Al2O3表面的Al-OH反应生成Al-O-Si键而有效地将其包裹,从而阻止了过渡态Al2O3微晶的相互接触,抑制了α-Al2O3的成核和生长.
参考文献
| [1] | M. Chatterjee;M. K. Naskar;P. K. Chakrabarty .Sol-gel alumina fibre mats for high-temperature applications[J].Materials Letters,2002(1):87-93. |
| [2] | Ramanan Venkatesh;Sutapa Roy Ramanan .Effect of organic additives on the properties of sol-gel spun alumina fibres[J].Journal of the European Ceramic Society,2000(14/15):2543-2549. |
| [3] | Ramanan Venkatesh;S.R. Ramanan .Influence of processing variables on the microstructure of sol-gel spun alumina fibres[J].Materials Letters,2002(3):189-195. |
| [4] | Wallenberger F T;Weston N E;Dunn S A .Melt spun calcium aluminate fibers:infrared transmission[J].Journal of Non-Crystalline Solids,1990,124(01):116-119. |
| [5] | Dinwoodie J.; .Alumina Fiber for High-Temperature Furnace Insulation[J].Ceramic Industry,1996(1):58-71. |
| [6] | D. Weiss;B. Chamberlain .Justifying aluminum metal matrix composites in an era of cost reduction[J].Modern Casting,2000(2):58-60. |
| [7] | (U)al (O);Peter K;Lagerl(o)f D .Tensile properties of alumina fibers using hot-grips[J].Journal of the American Ceramic Society,1994,77(10):2609-2614. |
| [8] | Mackenzie J D .Applications of the sol-gel process[J].Journal of Non-Crystalline Solids,1988,100(1-3):162-168. |
| [9] | Maki T;Sakka S .Preparation of alumina fibers by sol-gel method[J].Journal of Non-Crystalline Solids,1988,100(1-3):303-308. |
| [10] | J. Chandradass;M. Balasubramanian .Sol-gel processing of alumina fibres[J].Journal of Materials Processing Technology,2006(3):275-280. |
| [11] | Levin I.;Brandon D. .Metastable alumina polymorphs: Crystal structures and transition sequences[J].Journal of the American Ceramic Society,1998(8):1995-2012. |
| [12] | Roger B. Bagwell;Gary L. Messing .Effect of seeding and water vapor on the nucleation and growth of α-Al{sub}2O{sub}3 from γ-Al{sub}2O{sub}3[J].Journal of the American Ceramic Society,1999(4):825-832. |
| [13] | Dynys F W;Halloran J W .Alpha alumina formation in alum-derived gamma alumina[J].Journal of the American Ceramic Society,1982,65(09):442-448. |
| [14] | Ishitobi Y;Shimada M;Koizumi M .Reactive pressure sintering of alumina[J].American Ceramic Society Bulletin,1980,59(12):1208-1211. |
| [15] | Birchall J D;Morton M J .Process for preparing shaped body of alumina[P].USP:4320074,1982-03-16. |
| [16] | Sedaghat A;Taheri-Nassaj E;Naghizadeh R .An alumina mat with a nano microstructure prepared by centrifugal spinning method[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2006(26/27):2818-2828. |
| [17] | Horiuchi T.;Osaki T.;Sugiyama T.;Suzuki K.;Mori T.;Chen L. .A novel alumina catalyst support with high thermal stability derived from silica-modified alumina aerogel[J].Catalysis Letters,1999(2/3):89-92. |
| [18] | Brinker C J;Keefer K D;Schaefer D W et al.Sol-gel transition in simple silicates[J].Journal of Non-Crystalline Solids,1982,48(01):47-64. |
| [19] | Buckley A M;Greenblatt M .The sol-gel preparation of silica gels[J].Journal of Chemical Education,1994,71(07):599. |
| [20] | Duran A;Serna C;Fornes V et al.Structural considerations about SiO2 glasses prepared by sol-gel[J].Journal of Non-Crystalline Solids,1986,82(1-3):69-77. |
| [21] | Pope E J A;Mackenzie J D .Sol-gel processing of silica:Ⅱ the role of the catalyst[J].Journal of Non-Crystalline Solids,1986,87(1-2):185-198. |
| [22] | Brinker C J .Hydrolysis and condensation of silicates:effects on structure[J].Journal of Non-Crystalline Solids,1988,100(1-3):31-50. |
| [23] | Green DL.;Jayasundara S.;Lam YF.;Harris MT. .Chemical reaction kinetics leading to the first Stober silica nanoparticles - NMR and SAXS investigation[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2003(1/2):166-179. |
| [24] | Engelhardt G;Zeigan D;Jancke H et al.Silicon 29 NMR spectroscopy of silicate solutions Ⅱ dependence on the sodium-silicon ratio of the structure of silicate ions in aqueous sodium silicate solutions[J].Zeitschrift Fur Anorganische Und Allgemeine Chemie,1975,418(17):17-28. |
| [25] | Ramsay John D F;Swanton Stephen W;Matsumoto A.The colloid chemistry of silica[M].USA:American Chemical Society,1995:67-82. |
| [26] | Shuping Bi;Chenyi Wang;Qing Cao;Caihua Zhang .Studies on the mechanism of hydrolysis and polymerization of aluminum salts in aqueous solution: correlations between the "Core-links" model and "Cage-like" Keggin-Al_(13) model[J].Coordination chemistry reviews,2004(5/6):441-455. |
| [27] | Allouche L.;Loiseau T.;Ferey G.;Taulelle F.;Gerardin C. .Al-30: A giant aluminum polycation[J].Angewandte Chemie International Edition,2000(3):511-514. |
| [28] | Pei-Ling Chang;Fu-Su Yen;Kung-Chieh Cheng;Hei-Ling Wen .Examinations on the Critical and Primary Crystalline Sizes during θ- to α-Phase Transformation of Ultrafine Alumina Powders[J].Nano letters,2001(5):253-261. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%