硕士生导师
教师拼音名称:HRJ
学历:博士研究生
联系方式:青岛郑州路53号(青岛科技大学材料学院)
学位:工学博士
毕业院校:山东大学
学科:材料物理与化学
材料学最后更新时间:..
关键字:Y3Al5O12; co-precipitation method; crystalline precursor; nanocrystallite
摘要:A novel crystalline precursor for preparing Y3Al5O12 (YAG) nanocrystallite was synthesized via a co-precipitation method using (NH4)(2)CO3 solution as the precipitator. The precursor was characterized by means of powder X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), thermal gravimetry (TG), differential thermal gravimetry (DTG) and differential scanning calorimetry (DSC), respectively. The empirical chemical formula of the crystalline precursor can be expressed as 5[(NH4)(2)Al-6(CO3)(3)(OH)(14)]center dot 9[Y-2(CO3)(3)center dot 3H(2)O] according to the test results. The measured weight loss of 46.7% of the precursor without consideration of the absorbed water is in accord with the calculated value of 47.5% according to the above empirical formula. The phase-pure YAG nanocrystallites were obtained by calcining the above precursors at 900 degrees C for 2 hours in air atmosphere. Transmission electronic microscopy (TEM) result showed that the particle size of YAG nanocrystallites is 40-80 nm. The mechanism of themal decomposition of the crystalline precursor was also presented.
卷号:306-307
期号:
是否译文:否