国产日产欧美精品-亚洲国产综合久久精品-色综合色国产热无码一-亚洲欧美日本国产,免费观看一区二区三区_在线观看片A免费不卡观看_亚洲а∨天堂久久精品_99久无码中文字幕一本久道

產(chǎn)品展廳收藏該商鋪

您好 登錄 注冊(cè)

當(dāng)前位置:
美國(guó)布魯克海文儀器公司>技術(shù)文章>Preparation of nanoscaled yttrium oxide by citrate precipitation method

技術(shù)文章

Preparation of nanoscaled yttrium oxide by citrate precipitation method

閱讀:330          發(fā)布時(shí)間:2019-2-20
 作者:Jinqing CHEN(陳金清)a, Bin HUANG( )a,b, Chao HUANG( )a,b, Xiaoqi SUN(孫曉琦)b 

a School of Metallurgy and Chemical Engineering, Jiangxi University of Science & Technology, Ganzhou 341000, China

b Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen 361021, China

 

摘要:The nano-Y2O3 was prepared from YCl3 by the citrate precipitation method. The precursor powders were prepared by 0.1 mol/L YCl3 solution and 0.1 mol/L hydrochloric acid in the presence of 1% surfactant PEG2000, which was dried via an ethanol azeotropic distillation method. The effects of reaction temperature, precursor concentration, hydrochloric acid concentration, surfactant, and calcination temperature on the mean sizes of nano-Y2O3 were studied. It was found that the highest yield of precursor was about 70% at the pH value of 5.0, and the yield decreased rapidly at the pH value below 4 or over 6. The reaction temperature revealed no effect on the size of precursor. The optimized precursor concentration and hydrochloric acid concentration were both 0.1 mol/L. Several typical analytic techniques such as particle size analyzer, X-ray diffraction (XRD), thermogravimetric and differential thermal analyses (TG-DTA) and scanning electron microscopy (SEM) were used to determine the characteristics of the prepared nano powders. Homogeneous torispherical nano-Y2O3 with the smallest size (20 nm) could be obtained by calcining the precursor powders at 800 °C for an hour.

收藏該商鋪

請(qǐng) 登錄 后再收藏

提示

您的留言已提交成功!我們將在第一時(shí)間回復(fù)您~

對(duì)比框

產(chǎn)品對(duì)比 產(chǎn)品對(duì)比 聯(lián)系電話 二維碼 意見(jiàn)反饋 在線交流

掃一掃訪問(wèn)手機(jī)商鋪
010-62081908
在線留言
克山县| 兴宁市| 桂东县| 宝丰县| 区。| 策勒县| 固原市| 浙江省| 江津市| 灵璧县| 泸水县| 阿拉善盟| 阳曲县| 临沧市| 格尔木市| 赤水市| 乌拉特后旗| 秦皇岛市| 庄河市| 乐业县| 贞丰县| 交城县| 桦甸市| 合阳县| 大余县| 四子王旗| 桐柏县| 义马市| 成安县| 揭西县| 南溪县| 保德县| 秦皇岛市| 茌平县| 新营市| 海淀区| 郎溪县| 嘉善县| 香格里拉县| 威信县| 义马市|