期刊文献+

机械活化含不同镁源的混合物合成堇青石 被引量:3

Synthesis of cordierite from different MgO source-containing mixtures via mechanical activation
下载PDF
导出
摘要 分别以轻烧氧化镁、氢氧化镁、碱式碳酸镁为镁源,以三水铝石和无定形二氧化硅为铝源和硅源,按堇青石的理论组成配制成3种不同的混合料,经0、1、3、10、20、40 h机械活化后,在1 200、1 250、1 300、1 350℃空气气氛中煅烧3 h合成堇青石,用XRD分析机械活化前后物料的物相组成和结晶度以及合成产物的相组成。研究结果表明:1)以轻烧氧化镁为镁源的物料经40 h机械活化后仍未完全无定形化,而以氢氧化镁或碱式碳酸镁为镁源的物料经20或10 h机械活化后就完全无定形化;2)机械活化对3种物料的堇青石初始生成温度影响不大,在1 350℃煅烧3 h后,未机械活化的3种物料均未完全生成堇青石,而机械活化一定时间后的3种物料均形成了纯相堇青石,表明机械活化降低了堇青石的完全生成温度。 Three kinds of mixtures were prepared according to the theory composition of cordierite using light burned magnesia,magnesium hydroxide and basic magnesium carbonate as MgO sources,gibbsite and fumed silica as Al2O3 source and SiO2 source, respectively. The mixtures were mechanically milled for 0,1,3,10,20 and 40 h and heat-treated at 1 200 ℃,1 2.50 ℃,1 300 ℃ and 1 350 ℃ in air,respectively,to synthesize cordierite. The phase compositions and crystallinity of these mixtures before and after milling, and phase compositions of the synthesized products were characterized by XRD. The results show that: (])the light burned magnesia-containing mixture is not entirely amorphous after 40 h milling ,while the magnesium hydroxide-containing mixture or the basic magnesium carbonateontaining mixture totally transforms into amorphous status after milling for 20 h or 10 h,respectively; (2)the influence of mechanical activation on incipient temperature of cordierite formation can be ignored ;after heat-treating at 1350 ℃ for 3 h, pure cordierite is obtained from these milled mixtures, while the mixtures without mechanical activation don' t transform into cordierite completely, showing that mechanical activation decreases the complete temperature of cordierite formation.
出处 《耐火材料》 CAS 北大核心 2013年第1期14-18,共5页 Refractories
基金 国家自然科学基金项目(50872125) 国家高科技研究发展计划(863计划)项目(2009AA032503) 国际科技合作项目(2010DFB50350)
关键词 堇青石 高能球磨 机械活化法 合成 cordierite high-energy milling mechanical activation synthesis
  • 相关文献

参考文献11

  • 1Ye G T,Troczynski T. Mechanochemieal activation-assisted low-temperature synthesis of CaZrO3[J].Journal of the American Ceramic Society,2007,(01):287-290.doi:10.1111/j.1551-2916.2006.01335.x.
  • 2Chen L G,Ye G T,Xu D Y. Chemical bond change of gibbsite and fumed silica mixture during mechanical activation[J].Materials Letters,2012.91-94.
  • 3MacKenzie K J D,Temuujin J,Okada K. Thermal decomposition of mechanically activated gibbsite[J].Thermochimica Acta,1999,(1-2):103-108.
  • 4Temuujin J,Okada K,Mackenzie K J D. Comparative study of mechanochemical preparation of aluminosilicate precursors from various aluminium hydroxides and amorphous silica[J].British Ceramic Transactions,2000,(01):23-25.doi:10.1179/096797800680668.
  • 5Temmuujin J,Okada K,Mackenzie K J D. Formation of mullite from mechanochemically activated oxides and hydroxides[J].Journal of the European Ceramic Society,1998,(07):831-835.
  • 6Xu D Y,Ye G T,Zhu L L. Synthesis of mullite from different precursors with mechanical activation[A].Kyoto,Japan,2011.Nol-E-19.
  • 7Senna M. Grinding of mixture under mild condition for mechanochemical complexation[J].International Journal of Mineral Processing,1996.187-195.
  • 8Nahdi K,Rouquerol F,Trabelsi A M. Mg(OH)2 dehydroxylation:A kinetic study by controlled rate thermal analysis (CRTA)[J].Solid State Sciences,2009,(05):1028-1034.
  • 9Akao M,Marumo F,Iwai S. The crystal structure of hydromagnesite[J].Acta Crystallogr Sect B:Struc Sci,1974.2670-2672.
  • 10Ye G T,Troczynski T. Mechanical activation of heterogeneous solgel precursors for synthesis of MgAl2O4 spinel[J].Journal of the American Ceramic Society,2005,(10):2970-2974.doi:10.1111/j.1551-2916.2005.00533.x.

二级参考文献8

  • 1Ye G T,Troczynski T. Mechanical activation of heterogeneous sol-gel precursors for synthesis of MgAl2O4 spinel [ J ]. J Am Ceram Soc, 2005,88(10) :2 970 -2 974.
  • 2Tsuchida T, Horigome K. The effect of grinding on the thermal decomposition of alumina monohydrates, α- and β-Al2O3 · H2O[ J ]. Thermochimica Acta, 1995,254:359 - 370.
  • 3Shen T G, Koch C C, McCormick T L, et al. Structure and properties of amorphous/nanocrystallite silicon produced by ball milling [ J ]. Journal of Materials Research, 1995,10 ( 1 ) : 139 - 148.
  • 4Temmujin J, MacKenzie K J D, Schmucker M,et al. Phase evolution in mechanically treated mixtures of kaolinite and alumina hydrates ( gibbsite and boehmite) [ J]. Journal of the European Ceramic Society,2000,20(4) :413 -423.
  • 5Yong C C, Wang J. Mechanical-activation-triggered gibbsite-to- boehmite transition and activation-derived alumina powders [ J ]. J Am Ceram Soc,2001,84(6) :1 225 -1 230.
  • 6郭向华.Al2O3-SiO2体系的莫来石生成反应.现代技术陶瓷,1998,19(3):498-502.
  • 7叶国田,George Oprea,Tom Troczynski.机械活化氢氧化镁-勃姆石(或三水铝石)混合物合成镁铝尖晶石[J].耐火材料,2008,42(5):321-325. 被引量:2
  • 8杜春生.莫来石的工业应用[J].硅酸盐通报,1998,17(2):57-60. 被引量:30

共引文献1

同被引文献32

引证文献3

二级引证文献31

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部