【摘要】 以工业上常见的水合草酸钇和氨水为原料,采用湿固相机械化学法制备了D50<0.5μm,D90<1μm的窄分布超细氧化钇,研究了在球磨和煅烧过程中对氧化钇粒度的影响因素,通过粉末X射线衍射(XRD)、同步热分析(TG-DSC)和傅立叶变换红外光谱(FTIR)考察了球磨过程中的机械化学反应与物相转变,以及前驱体的热分解过程。更多还原

【Abstract】 Ultrafine yttria with narrow particle size distribution of D₅₀<0.5 μm and D₉₀<1 μm was prepared via wet-solid-phase mechanochemical reaction between hydrate yttrium oxalate and ammonia in planetary mill.The factors influencing the particles size of yttria in the processes of milling and calcinating were investigated.The mechanochemical reaction and phase evolution during milling and the thermal decomposition of the precursor were studied by means of powder X-ray diffraction（XRD）,simultaneous thermogravimetric analysis and differential scanning calorimetry（TG-DSC）,Fourier transform infrared spectroscopy（FTIR） and scanning electron microscopy（SEM）.更多还原