本文選題：鋁酸鑭　切入點(diǎn)：低溫固相反應(yīng)法　出處：《機(jī)械工程材料》2017年02期

【摘要】：以九水合硝酸鋁、六水合硝酸鑭為原料,檸檬酸為絡(luò)合劑,通過低溫固相反應(yīng)法制備鋁酸鑭前驅(qū)體,分析了該前驅(qū)體的組成及熱分解過程;將鋁酸鑭前驅(qū)體在不同溫度下煅燒制備鋁酸鑭粉體,研究了鋁酸鑭粉體的合成溫度以及煅燒溫度對(duì)鋁酸鑭粉體形貌、粒徑和比表面積的影響。結(jié)果表明:鋁酸鑭前驅(qū)體中形成了含有La-O-Al鍵的絡(luò)合物,當(dāng)煅燒溫度達(dá)到700℃時(shí)開始生成鋁酸鑭晶體;隨著煅燒溫度的升高,鋁酸鑭晶體的晶格畸變程度減小,晶粒逐漸長大,粉體結(jié)晶度不斷提高,粒徑則逐漸減小;在1 000℃煅燒得到鋁酸鑭粉體的粒徑最小,為0.310μm,比表面積最大,為16.58m~2·g~(-1)。
[Abstract]:The precursor of lanthanum aluminate was prepared by low temperature solid state reaction with aluminum nitrate hexahydrate as raw material and citric acid as complex agent. The composition and thermal decomposition process of the precursor were analyzed.Lanthanum aluminate powders were prepared by calcination of lanthanum aluminate precursor at different temperatures. The effects of synthesis temperature and calcination temperature on the morphology, particle size and specific surface area of lanthanum aluminate powder were studied.The results show that lanthanum aluminate crystals are formed in the precursor of lanthanum aluminate containing La-O-Al bond, and the crystal lattice distortion decreases with the increase of the calcination temperature, and the crystal grain grows gradually when the calcination temperature reaches 700 鈩，

本文編號(hào)：1710787