本實驗在國家同步輻射研究中心(National Synchrotron Radiation Research Center：NSRRC)－BL01C1實驗站，利用X-ray 繞射角度擴散分析（angle-dispersive x-ray diffraction, ADXRD）對以化學沉澱法製備之奈米氧化鋅摻雜3%鋁（Aluminum doped ZnO, Zn0.97Al0.03O）進行高壓實驗，研究Zn0.97Al0.03O在常溫高壓下相變的情形。
實驗中，將Zn0.97Al0.03O由常壓加壓至19.20 GPa，研究結果顯示，Zn0.97Al0.03O由纖鋅礦結構（würtzite structure, B4) 轉變成氯化鈉相結構(rocksalt structure, B1)的相變起始壓力為9.02 GPa，相變完成的壓力為16.54 GPa，比前人所研究之奈米氧化鋅相變起始壓力9.3~13.7 GPa更為提早，顯示鋁的摻雜影響氧化鋅晶體結構的穩定性。
本研究觀察出，在加壓過程中，纖鋅礦結構的c軸比a軸更容易被壓縮，在相變發生前，c/a 值逐漸下降，平行c軸的鋅氧之間的鍵長幾乎沒有改變，而相變開始後c/a 值逐漸上升，鋅氧之間的鍵長也增加，直到相變完成，與前人所提出氧化鋅相變模型的「hexagonal」路徑相符合。

This experiment is to study phase transition of Zn0.97Al0.03O（3% Aluminum doped ZnO, Zn0.97Al0.03O）under the room temperature and high pressure. The Zn0.97Al0.03O is prepared by chemical precipitation method then analyzed through high pressure experiment by angle-dispersive x-ray diffraction(ADXRD) in LAB-BL01C1 of National Synchrotron Radiation Research Center (NSRRC).
Zn0.97Al0.03O was pressurized from ambient to 19.20 GPa in this experiment. The phase transition from the würtzite-type (B4) to the rocksalt-type (B1) phase started at 9.02 GPa and completed at 16.54 GPa. The initial transition pressure of Zn0.97Al0.03O is earlier than the formal conclusion 9.3~13.7 GPa. It indicates that Al doped influence the stability of Zn0.97Al0.03O structure.
From the result of the research, c axis is compressed more easily than a axis. Before the phase transition, c/a ratio decreases gradually but the bond length between Zn and O parallel to the c axis changes slightly. As soon as the phase transition starts, the c/a ratio and the bond length between Zn and O increase till the completion of the phase transition. The Zn0.97Al0.03O phase transition model through hexagonal path meets the result of formal research.

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