本文選題：氧化鋯　切入點(diǎn)：水熱法　出處：《表面技術(shù)》2017年09期

【摘要】：目的制備分散性好、粒徑分布窄的穩(wěn)定氧化鋯納米粉體。方法采用水熱法制備氧化鋯納米粉體,考察水熱時(shí)間、p H值、溫度和有機(jī)添加劑丙三醇,對(duì)氧化鋯粉體顆粒粒徑、結(jié)晶度及穩(wěn)定性的影響。通過(guò)XRD和SEM分析技術(shù)對(duì)不同條件下制備的樣品進(jìn)行表征。結(jié)果結(jié)晶度隨著水熱反應(yīng)溫度的升高而提高,形核速率在250℃時(shí)快速增加,粒徑在150~250℃出現(xiàn)先長(zhǎng)大后減小的規(guī)律。反應(yīng)溶液的p H值影響樣品的結(jié)晶度,通過(guò)調(diào)節(jié)溶液p H值可以減小粉體顆粒之間的團(tuán)聚,改善粉體的分散性。水熱反應(yīng)進(jìn)程越充分,樣品的平均粒徑越大。加丙三醇后,在反應(yīng)條件為200℃、p H=10、t=12 h時(shí)制備釔摻雜量3%的氧化鋯粉體,于1000℃煅燒12 h,得到分散性好、粒徑分布窄的單立方相納米氧化鋯粉體顆粒。結(jié)論通過(guò)設(shè)定水熱法反應(yīng)溫度、p H值、時(shí)間,可以制備粒徑可控的穩(wěn)定氧化鋯納米粉體,且釔摻雜可有效提高氧化鋯的穩(wěn)定性。加入丙三醇可以有效地改善粉體的分散性和穩(wěn)定性,煅燒穩(wěn)定氧化鋯納米粉體可以有效減小粉體粒徑分布和提高粉體的結(jié)晶度。
[Abstract]:Objective to prepare stable zirconia nanoparticles with good dispersion and narrow particle size distribution.Methods Nano-sized zirconia powders were prepared by hydrothermal method. The effects of hydrothermal time, pH value, temperature and organic additive glycerol on the particle size, crystallinity and stability of zirconia powder were investigated.The samples prepared under different conditions were characterized by XRD and SEM.Results the crystallinity increased with the increase of hydrothermal reaction temperature, the nucleation rate increased rapidly at 250 鈩，

本文編號(hào)：1704731