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首页> 外文期刊>Journal of Crystal Growth >A novel method for the synthesis of nano-sized BaAl_2O_4 with thermal stability
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A novel method for the synthesis of nano-sized BaAl_2O_4 with thermal stability

机译：一种新的具有热稳定性的纳米BaAl_2O_4的合成方法

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摘要

Thermal stable BaAl_2O_4 nanocrystallites with pure spinel structure was successfully prepared at 650℃ using amorphous BaAl_2(DTPA)_(1.6)(H_2O)_3 as precursor. The crystallization temperature via this synthesis way was about 500℃ lower than that via traditional methods, such as sol-gel synthesis and solid-state reactions. The precursor was synthesized by simple inorganic reaction and can be decomposed into BaAl_2O_4 species at the temperature below 500℃, which was proved by DTA-TGA and X-ray photoelectron spectroscopy. X-ray diffraction results illustrated that BaAl_2O_4 crystal phase can be formed at 650℃ with crystal size less than 60 nm. Especially, the crystal size increased weakly with either promoting the calcination temperature or prolonging the sintering time, indicating the high thermal stability of this material. The grain size was approximately 60 nm and the surface area was 10.88 m~2/g.
机译：以非晶态BaAl_2（DTPA）_（1.6）（H_2O）_3为前驱体，在650℃成功制备出具有尖晶石结构的热稳定BaAl_2O_4纳米微晶。这种合成方法的结晶温度比溶胶-凝胶合成和固态反应等传统方法的结晶温度低约500℃。 DTA-TGA和X射线光电子能谱证明了该前驱体是通过简单的无机反应合成的，在500℃以下可以分解为BaAl_2O_4。 X射线衍射结果表明，在650℃可以形成BaAl_2O_4晶相，晶体尺寸小于60 nm。尤其是，随着提高煅烧温度或延长烧结时间，晶体尺寸微弱地增加，表明该材料的高热稳定性。晶粒尺寸为约60nm，表面积为10.88m 2 / g。

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