(中南大學(xué) 冶金與環(huán)境學(xué)院，長(zhǎng)沙 410083)
摘 要: 采用水熱水解法制備粒徑可控的釔穩(wěn)定四方相氧化鋯(Y-TZP)粉末，考察水熱時(shí)間、溫度和H+濃度對(duì)Y-TZP前軀體粉末顆粒粒徑及其分布的影響。結(jié)果表明:水熱水解法制備的Y-TZP前驅(qū)體粉末為單斜相，分散性好，顆粒粒徑為50~300 nm；水解水熱反應(yīng)進(jìn)程越充分，前驅(qū)體顆粒平均粒徑越大，陳化導(dǎo)致其粒徑分布變寬。在實(shí)驗(yàn)的濃度(0.485 mol/L ZrOCl2、0.03 mol/L YCl3)和溫度(130~150 ℃)范圍內(nèi)，升高溫度，前驅(qū)體顆粒平均粒徑從186.2 nm降低為94.1 nm，且其分布變窄；H+濃度對(duì)前驅(qū)體顆粒平均粒徑影響明顯，提高H+濃度，前驅(qū)體顆粒的平均粒徑先增大后減小。水熱水解法制備的Y-TZP前驅(qū)體滴氨摻釔后，于1000 ℃煅燒1 h得到釔穩(wěn)定四方相氧化鋯(Y-TZP)粉末，粒徑約為120 nm，且其分布較窄。
關(guān)鍵字: 氧化鋯；Y-TZP前軀體；水熱水解；粒徑；分布
（School of Metallurgy and Environment, Central South University, Changsha 410083, China）
Abstract:Yttria-stabilized tetragonal zirconia polycrystal(Y-TZP) powders of controllable sizes were prepared by hydrothermal hydrolysis process. The effects of hydrothermal time, temperature and H+ ions concentration on the particle sizes and their distributions of the Y-TZP precursor powders were investigated experimentally. The results show that the Y-TZP precursor powders prepared by hydrothermal hydrolysis are monoclinic with good dispersion, and the particle sizes are 50-300 nm. The average particle size of the Y-TZP precursor increases as the reaction progresses more fully, while aging will broaden the particle-size distribution of the Y-TZP precursor. At the range of experimental concentrate (0.485 mol/L ZrOCl2, 0.03 mol/L YCl3) and temperature (130-150 ℃), when the temperature increases from 130℃ to 150 ℃, the average particle sizes of the Y-TZP precursor decrease from 186.2 nm to 94.1 nm, and the particle-size distributions become narrow. The concentrations of H+ ions affect the average particle sizes of the Y-TZP precursor significantly, and the average particle sizes of the Y-TZP precursor increase at first, and then decrease with the increase of H+ ions concentration. Yttria-stabilized tetragonal zirconia powders (Y-TZP) are obtained by doping the precursor powders with yttria through ammonia titration and then calcining them at 1000 ℃ for 1 h. The average particle size is 120 nm, and the size distributions become narrow.
Key words: zirconia; Y-TZP precursor; hydrothermal hydrolysis; particle size; distribution
