| 铂系金属氧化物对增强Al2O3热稳定性作用的研究‘ |
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| 引用本文： | 董华霞 叶儿生. 铂系金属氧化物对增强Al2O3热稳定性作用的研究‘[J]. 传感技术学报, 1997, 10(2): 18-23 |
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| 作者姓名： | 董华霞 叶儿生 |
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| 作者单位： | 上海交通大学信息与控制工程系!上海200030 |
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| 摘 要： | 为探索铂金属氧化物（以下均用ＭＯｘ代表）对增强载体Ａｌ２Ｏ３热稳定性作用的机理。本文采用了氮物理等温吸附，Ｘ－射线物相分析，电子探针及附载催化剂的活性试验等多种方法，研究了Ａｌ２Ｏ３和ＭＯｘ－Ａｌ２Ｏ３两种物系的物理和化学性质，认为ＭＯｘ对增强协体Ａｌ２Ｏ３热稳定性的作用，主要是通过ＭＯｘ与Ａｌ２Ｏ３间存在较强的相互作用，从而提高了Ａｌ＾３＋和Ｏ＾－２的扩散活化能，在一定程度上抑制了它们间的互扩散
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| 关 键 词： | 载体 氧化铝 热稳定性 铂系金属氧化物 敏感元件 |
Mechanism of Metal Oxide of Pt-Series to Increase Thermal Stability of Al_2O_3 Carrier |
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| Dong Huaxia Ye Pengsheng. Mechanism of Metal Oxide of Pt-Series to Increase Thermal Stability of Al_2O_3 Carrier[J]. Journal of Transduction Technology, 1997, 10(2): 18-23 |
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| Authors: | Dong Huaxia Ye Pengsheng |
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| Abstract: | In order to explore the mechanism of the metal oxide of Pt-series(MOx) to increase the thermal stability of Al2O3 carrier, in this paper the physical and chemical properties of both the Al2O3 system and the MOx-Al2O3 system are widely investigated by means of N2 isothemal physisorption, XRD, SEM and activity test of supported catalysts, etc. It is pointed out that there is strong interaction between MOx and Al2O3, which will increase the Al+3 and O-2 diffused activation energy and restrain their diffusion. In addition, in heated process, the crystals of MOx will be separated between the crystal surfaces of Al2O3, which will increase the transporting potential barrier of Al2O3-crystals and prevent them further aggregation. |
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| Keywords: | carrier alumina thermal stability metal oxide of Pt-series diffused activation energy |
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