FURTHER CHARACTERIZATION OF THE ALUMINUM PEROXIDE OXIDE, ALO2, FORMED BY INTERFACIAL REACTION BETWEEN PT AND ALPHA-AL2O3
FURTHER CHARACTERIZATION OF THE ALUMINUM PEROXIDE OXIDE, ALO2, FORMED BY INTERFACIAL REACTION BETWEEN PT AND ALPHA-AL2O3
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DOI：
10.1016/0956-7151(94)00425-h
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发表时间：
1995-05-01
期刊：
影响因子：
--
通讯作者：
SASS, SL
中科院分区：
文献类型：
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作者：
LU, YC;AGNEW, S;SASS, SL
最近表明，一种新的亚稳态过氧化铝 AlO2 是在 Pt 和 α-Al2O3 扩散键合过程中存在动力学约束的情况下通过界面反应形成的。描述了对 AlO2 的性质、键合、形成动力学和化学的进一步研究，并总结了其形成动力学的最新知识。 AlO2 的拉曼光谱在过氧化物离子的频率范围内给出了几个峰值，为它们的存在提供了迄今为止最有力的证据。电子微探针分析仅检测到 Al 和 O，任何其他元素（如果存在）均低于波长色散技术的检测极限。卢瑟福背向散射光谱在碳共振能量下可以检测到 AlO2 中没有碳。的研究。温度对AlO2形成的影响表明，它在1200至1400℃的温度范围内加热24小时后形成，但在1100℃或低于1100℃时则不会形成。在1200℃的空气中加热使AlO2首先转变为立方形式的Al2O3，然后最终恢复为α-Al2O3。 AlO2的介电常数为22.7，大约是平行于c方向的α-Al2O3的两倍，硬度为8.4GPa，大约是α-Al2O3的二分之一。
A new metastable aluminum peroxide oxide, AlO2, was recently shown to form by an interfacial reaction in the presence of a kinetic constraint during diffusion-bonding of Pt and alpha-Al2O3. Further studies of the properties, bonding, formation kinetics and chemistry of AlO2 are described and the current slate of knowledge of the kinetics of its formation is summarized. Raman spectroscopy on AlO2 gave several peaks in the frequency range characteristic of peroxide ions, providing the strongest evidence yet for their presence. Electron microprobe analysis detected only Al and O, with any other elements, if present, being below the detectability limit of the wavelength dispersive technique. Rutherford backscattering spectroscopy at the carbon resonance energy could detect no carbon within the AlO2. Studies of. the effect of temperature on the Formation of AlO2 show that it forms after heating for 24h in the temperature range of 1200 to 1400 degrees C, but not at or below 1100 degrees C. Heating in air at 1200 degrees C causes AlO2 to first transform to a cubic form of Al2O3, before finally reverting to alpha-Al2O3. The dielectric constant of AlO2 is 22.7, approximately twice that of alpha-Al2O3 parallel to the c direction, and the hardness of 8.4 GPa is approximately one-half that of alpha-Al2O3.