Open AccessHydrothermal-solid state synthesis of Gadolinium aluminate nano whiskers with alkaline mineralizer
Author(s) -
Pengyuan Qi,
Jiajun Zhong,
Shiyu Dai,
Weimin Ma,
Lili Jiang
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab7dfd
Subject(s) - calcination , hydrothermal circulation , aluminate , whiskers , differential thermal analysis , scanning electron microscope , materials science , fourier transform infrared spectroscopy , thermogravimetry , hydrothermal synthesis , chemical engineering , nucleation , nuclear chemistry , mineralogy , inorganic chemistry , chemistry , metallurgy , diffraction , composite material , organic chemistry , cement , engineering , physics , optics , catalysis
Gadolinium aluminate (GdAlO 3 , GAP) nano whiskers were synthesized by the hydrothermal-solid state method, Fourier-transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM) and thermogravimetry-differential thermal analysis (TG-DTA) were employed to analyze the phase change and the nucleation mechanism of GAP during calcing process. The results show that the precursor of GAP prepared by hydrothermal is (NH 4 ) x GdAl(OH) y (NO 3 ) z ·nH2O. When the calcination temperature is higher than 900 °C, the precursor recrystallizes, forming the needle shape GAP under the synergistic effect factors. The best preparation conditions are as follows: ammonia water as mineralizer, pH = 9, calcination temperature 1100 °C and holding time 3 h.