Home

Citation: He Chong-Min, Zhang Wen-Min, Wang Ren. Surface Area Stability of Aluminas Modified by Rare Earths[J]. Acta Physico-Chimica Sinica, ;1996, 12(11): 971-975. doi: 10.3866/PKU.WHXB19961103 shu

Surface Area Stability of Aluminas Modified by Rare Earths

1.
Department of Chemistry,Anhui Normal University,Wuhu 241000

Received Date: 13 May 1996
Available Online: 15 November 1996

Surface modification with rare earths was investigated for improving the hydrothermal stability of γ-Al2O3. The rare earths were added by impregnation or kneading method. Among the rare earths, studied lanthanum is the most effective promoter for inhibiting the reduction of surface area of Al2O3 sintered in wet air(14kPa water vapor) at 1273K for 24h, because its cations with valence 3+ and proper ionic radii can insert into the crystal lattice of Al2O3 and prevent the transition of Al2O3 from sintering and transforming to α-Al2O3. The presence of vapor-phase water in sinter tests was found to have a pronounced effect on surface area of Al2O3. The XRD measurements show that the α-phase increases and the crystal sizes become larger as area decreases. The kinetics for sintering of Al2O3 was studied and the constants, n and k, were used to calculate the rate of area loss at given area level.
- Rare earths,
- Alumina,
- Surface area,
- Thermal stability
1. [1]
  Xia Shu , Longtian Sima , Jiali Wang , Jiacheng Chu , Xieyidai·Yusunjiang , Mubareke·Maimaitijiang , Yingwei Lu , Yan Wang . Analysis of the Report Generated by the QuadraSorb evo BET Surface Area Analyzer. University Chemistry, 2025, 40(5): 391-400. doi: 10.12461/PKU.DXHX202411013
2. [2]
  Xuewei BA , Cheng CHENG , Huaikang ZHANG , Deqing ZHANG , Shuhua LI . Preparation and luminescent performance of Sr_1-xZrSi₂O₇∶xDy³⁺ phosphor with high thermal stability. Chinese Journal of Inorganic Chemistry, 2025, 41(2): 357-364. doi: 10.11862/CJIC.20240096
3. [3]
  Yuchen Zhou , Huanmin Liu , Hongxing Li , Xinyu Song , Yonghua Tang , Peng Zhou . Designing thermodynamically stable noble metal single-atom photocatalysts for highly efficient non-oxidative conversion of ethanol into high-purity hydrogen and value-added acetaldehyde. Acta Physico-Chimica Sinica, 2025, 41(6): 100067-. doi: 10.1016/j.actphy.2025.100067
4. [4]
  Zhaomei LIU , Wenshi ZHONG , Jiaxin LI , Gengshen HU . Preparation of nitrogen-doped porous carbons with ultra-high surface areas for high-performance supercapacitors. Chinese Journal of Inorganic Chemistry, 2024, 40(4): 677-685. doi: 10.11862/CJIC.20230404
5. [5]
  Jiaxi Xu , Yuan Ma . Influence of Hyperconjugation on the Stability and Stable Conformation of Ethane, Hydrazine, and Hydrogen Peroxide. University Chemistry, 2024, 39(11): 374-377. doi: 10.3866/PKU.DXHX202402049
6. [6]
  Yuting ZHANG , Zunyi LIU , Ning LI , Dongqiang ZHANG , Shiling ZHAO , Yu ZHAO . Nickel vanadate anode material with high specific surface area through improved co-precipitation method: Preparation and electrochemical properties. Chinese Journal of Inorganic Chemistry, 2024, 40(11): 2163-2174. doi: 10.11862/CJIC.20240204
7. [7]
  Zian Fang , Qianqian Wen , Yidi Wang , Hongxia Ouyang , Qi Wang , Qiuping Li . The Test Paper for Metal Ion: A Popular Science Experiment Based on Color Aesthetics. University Chemistry, 2024, 39(5): 108-115. doi: 10.3866/PKU.DXHX202310032
8. [8]
  Heng Chen , Longhui Nie , Kai Xu , Yiqiong Yang , Caihong Fang . 两步焙烧法制备大比表面积和结晶性增强超薄g-C₃N₄纳米片及其高效光催化产H₂O₂. Acta Physico-Chimica Sinica, 2024, 40(11): 2406019-. doi: 10.3866/PKU.WHXB202406019
9. [9]
  Shitao Fu , Jianming Zhang , Cancan Cao , Zhihui Wang , Chaoran Qin , Jian Zhang , Hui Xiong . Study on the Stability of Purple Cabbage Pigment. University Chemistry, 2024, 39(4): 367-372. doi: 10.3866/PKU.DXHX202401059
10. [10]
  Xuyang Wang , Jiapei Zhang , Lirui Zhao , Xiaowen Xu , Guizheng Zou , Bin Zhang . Theoretical Study on the Structure and Stability of Copper-Ammonia Coordination Ions. University Chemistry, 2024, 39(3): 384-389. doi: 10.3866/PKU.DXHX202309065
11. [11]
  Xiaoning TANG , Junnan LIU , Xingfu YANG , Jie LEI , Qiuyang LUO , Shu XIA , An XUE . Effect of sodium alginate-sodium carboxymethylcellulose gel layer on the stability of Zn anodes. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1452-1460. doi: 10.11862/CJIC.20240191
12. [12]
  Yingtong Shi , Guotong Xu , Guizeng Liang , Di Lan , Siyuan Zhang , Yanru Wang , Daohao Li , Guanglei Wu . PEG-VN modified PP separator for high-stability and high-efficiency lithium-sulfur batteries. Acta Physico-Chimica Sinica, 2025, 41(7): 100082-. doi: 10.1016/j.actphy.2025.100082
13. [13]
  Jing SU , Bingrong LI , Yiyan BAI , Wenjuan JI , Haiying YANG , Zhefeng Fan . Highly sensitive electrochemical dopamine sensor based on a highly stable In-based metal-organic framework with amino-enriched pores. Chinese Journal of Inorganic Chemistry, 2024, 40(7): 1337-1346. doi: 10.11862/CJIC.20230414
14. [14]
  Renqing Lü , Shutao Wang , Fang Wang , Guoping Shen . Computational Chemistry Aided Organic Chemistry Teaching: A Case of Comparison of Basicity and Stability of Diazine Isomers. University Chemistry, 2025, 40(3): 76-82. doi: 10.12461/PKU.DXHX202404119
15. [15]
  Baitong Wei , Jinxin Guo , Xigong Liu , Rongxiu Zhu , Lei Liu . Theoretical Study on the Structure, Stability of Hydrocarbon Free Radicals and Selectivity of Alkane Chlorination Reaction. University Chemistry, 2025, 40(3): 402-407. doi: 10.12461/PKU.DXHX202406003
16. [16]
  Zeyi Yan , Ruitao Liu , Xinyu Qi , Yuxiang Zhang , Lulu Sun , Xiangyuan Li , Anchao Feng . Exploration of Suspension Polymerization: Preparation and Fluorescence Stability of Perovskite Polystyrene Microbeads. University Chemistry, 2025, 40(4): 72-79. doi: 10.12461/PKU.DXHX202405110
17. [17]
  Jie WU , Zhihong LUO , Xiaoli CHEN , Fangfang XIONG , Li CHEN , Biao ZHANG , Bin SHI , Quansheng OUYANG , Jiaojing SHAO . Critical roles of AlPO₄ coating in enhancing cycling stability and rate capability of high voltage LiNi_0.5Mn_1.5O₄ cathode materials. Chinese Journal of Inorganic Chemistry, 2025, 41(5): 948-958. doi: 10.11862/CJIC.20240400
18. [18]
  Yanhui Sun , Junmin Nan , Guozheng Ma , Xiaoxi Zuo , Guoliang Li , Xiaoming Lin . Exploration and Teaching Practice of Ideological and Political Elements in Interface Physical Chemistry: Taking “Additional Pressure on Curved Surfaces” as an Teaching Example. University Chemistry, 2024, 39(11): 20-27. doi: 10.3866/PKU.DXHX202402023
19. [19]
  Xiaoning TANG , Shu XIA , Jie LEI , Xingfu YANG , Qiuyang LUO , Junnan LIU , An XUE . Fluorine-doped MnO₂ with oxygen vacancy for stabilizing Zn-ion batteries. Chinese Journal of Inorganic Chemistry, 2024, 40(9): 1671-1678. doi: 10.11862/CJIC.20240149
20. [20]
  Siyao Zhan , Yajiao Wang , Zhihuan Cai , Ayizhada Maimaitiyumier , Tilan Duan , Xiangfeng Wei , Qi Wang , Jiehua Liu , Xianghua Kong . Exploration of the Chemical Elements across Time and Space. University Chemistry, 2024, 39(9): 5-10. doi: 10.12461/PKU.DXHX202403071

Get Citation

PDF

XML

Metrics

PDF Downloads(2257)
Abstract views(3586)
HTML views(60)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return