性做久久久久久坡多野结衣-性做久久久久久久久浪潮-性欲影院-性影院-国产精品线路一线路二-国产精品兄妹在线观看麻豆

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:337          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
主站蜘蛛池模板: 临夏县| 青阳县| 康马县| 滕州市| 杭州市| 会东县| 兰溪市| 奉贤区| 格尔木市| 彰武县| 佛学| 武鸣县| 依兰县| 湟中县| 驻马店市| 丁青县| 合肥市| 襄樊市| 墨脱县| 库伦旗| 图片| 郸城县| 潢川县| 海南省| 成都市| 汝阳县| 南华县| 长兴县| 壤塘县| 邳州市| 木兰县| 额尔古纳市| 静安区| 田东县| 富宁县| 大竹县| 大余县| 宣化县| 特克斯县| 淮阳县| 洪湖市|