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2009 , Vol. 24 >Issue 5: 934 - 938

DOI: https://doi.org/10.3724/SP.J.1077.2009.00934

研究论文

Al13低温合成尖晶石和尖晶石氧化锆复合材料

  • 张志杰 ,
  • 钟明峰
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  • （华南理工大学 材料学院, 广州 510640）

收稿日期: 2008-12-15

  修回日期: 2009-03-31

  网络出版日期: 2009-09-20

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Spinal and Spinel-zirconia Composite Material Prepared at Low Temperature by Al13 as Aluminium Source

  • ZHANG Zhi-Jie ,
  • ZHONG Ming-Feng
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  • (The College of Material Science & Engineering, South China University of Technology, Guangzhou 510640, China)

Received date: 2008-12-15

  Revised date: 2009-03-31

  Online published: 2009-09-20

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摘要

以［AlO4Al12(OH)24(H2O) 12］7+（简写为Al13）溶液为铝源, 采取湿化学的方法合成尖晶石及尖晶石氧化锆复合粉体. 采用27Al NMR、DSC-TG、XRD和FTIR等研究前驱体结构、反应过程及微结构演变. 将氯化镁、氢氧化钠混合研磨后加入Al13溶液中, 得到由Mg6Al2CO3(OH)16·4H2O 和 β-Al(OH)3组成的前驱体, 经过600℃煅烧形成尖晶石, 更高温煅烧产物仍为尖晶石单相. 以Al13、MgCl2·6H2O和ZrOCl2·8H2O为原料制备的前驱体经600℃煅烧, 同样获得尖晶石和四方相氧化锆. Al13粉末和尖晶石氧化锆复合粉体的FTIR谱显示, 归属于［AlO6］的吸收谱带由608cm-1移至 601cm-1, 归属于 ［AlO4］ 的吸收谱带由761cm-1 移至 723cm-1. 前驱体中形成的AlOMg键合是以Al13为铝源合成尖晶石和尖晶石氧化锆复合粉体具有低温合成的主要原因.

关键词： Al13; 尖晶石; 尖晶石氧化锆; 低温合成

本文引用格式

张志杰 , 钟明峰 . Al13低温合成尖晶石和尖晶石氧化锆复合材料[J]. 无机材料学报, 2009 , 24(5) : 934 -938 . DOI: 10.3724/SP.J.1077.2009.00934

Abstract

Spinel and spinel-zirconia composite powder were synthesized by soft chemistry method using ［AlO4Al12(OH) 24(H2O) 12］7+（abbreviated Al13） as aluminum source. Precursor structure, reaction progress and material microstructure evolvement were characterized by 27Al NMR, XRD, DSC-TG and FTIR. Spinel precursor was prepared by mixing Al13 solution and magnesium slurry which was obtained by milling the mixture of MgCl2·6H2O and NaOH, and its component included Mg6Al2CO3(OH)16·4H2O and β-Al(OH)3. Spinel is formed from calcination of this spinel precursor at 600℃ for 1h, and only spinel is formed at even higher temperatures. Spinel-zirconia composite powder precursor is prepared by hydrolysis-precipitation process of Al13, MgCl2·6H2O and ZrOCl2·8H2O solution. Spinel-zirconia composite powder can also be obtained from calcination of the precursor at 600℃. FTIR spectra of the Al13 powder and spinelzirconia precursor show that the ［AlO6］ absorption band shifts from 608cm-1 to 601cm-1 and ［AlO4］ from 761cm-1 to 723cm-1.The result shows that Al13 has obvious advantage in synthesis of spinel and spinelzirconia composite powders at low temperature because Al-O-Mg bond can be formed easily in precursors.

Key words： Al13; spinel; spinel-zirconia; low temperature synthesize

参考文献

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