本文關(guān)鍵詞： 四方相氧化鋯 穩(wěn)定劑 溶膠-凝膠法 臨界尺寸　出處：《人工晶體學(xué)報》2017年03期 　論文類型：期刊論文

【摘要】：以八水氧氯化鋯(ZrOCl_2·8H_2O)為原料,以氨水(NH_3·H_2O)、氫氧化鈉(Na OH)溶液為沉淀劑,采用溶膠-凝膠法制備納米級氧化鋯粉體,對前驅(qū)體加入不同的穩(wěn)定劑,通過吸濾、干燥、煅燒等工藝,得到以四方氧化鋯晶相為主、不同粒度組成、不同四方相含量的樣品。利用激光納米粒度分析儀、X-射線衍射(XRD)等分析手段分別對粉體的粒徑、物相組成進(jìn)行表征,分別采用晶面公式、謝樂公式對四方相含量、晶粒尺寸進(jìn)行計算。分析了室溫下加入不同穩(wěn)定劑制備的氧化鋯納米粉體中四方相含量和顆粒粒徑之間的關(guān)系。結(jié)果表明:氧化釔穩(wěn)定的氧化鋯納米粉粒度更細(xì)、粒度分布更均勻。經(jīng)400~1000℃×2 h煅燒后,通過氧化鋯納米粉晶粒尺寸累積分布與四方相含量的關(guān)系可以得出以氧化鎂、氧化鈣、氧化釔為穩(wěn)定劑制備的氧化鋯納米粉相變臨界粒徑分別為24~28 nm、26~33.6 nm、18~22.6 nm。
[Abstract]:Nano-sized zirconia powders were prepared by sol-gel method using Zirconium Chloride (ZrOCl _ 2 路8H _ 2O) as raw material and ammonia water (NH _ 3 路H _ 2O _ 2) solution as precipitant. Different stabilizers were added to the precursor. Samples with tetragonal zirconia crystal phase, different particle size composition and different tetragonal phase content were obtained. The particle size and phase composition of the powder were characterized by means of X-ray diffraction (XRD) and laser nanocrystalline analysis. The crystal plane formula and Xie Lecong's formula were used to analyze the content of tetragonal phase, The relationship between tetragonal phase content and particle size of zirconia nanocrystalline powders prepared by adding different stabilizers at room temperature is analyzed. The results show that yttrium stabilized zirconia nanocrystalline powders are finer in size. The grain size distribution is more uniform. After calcined at 400 鈩，

本文編號：1508488