Understanding the structure, thermal, and optical properties in Al2O3-incorporated La2O3-TiO2-Nb2O5 glasses
文献类型：期刊论文
| 作者 | Yang, Jun3; Li, Jianqiang2; P., Lu |
| 刊名 | Journal of the American Ceramic Society
 |
| 出版日期 | 2021-06-01 |
| 卷号 | 104期号:6页码:2539-2551 |
| ISSN号 | 27820 |
| 关键词 | Structural properties - Activation energy - Aluminum oxide - Thermodynamic stability - Niobium oxide - Oxygen - Alumina - Infrared devices - Refractive index - Crystallization kinetics - Lenses - Optical data processing - Optical glass |
| DOI | 10.1111/jace.17698 |
| 英文摘要 | Glasses in the 30La2O3-40TiO2-30Nb2O5 system are known to have excellent optical properties such as refractive indices over 2.25 and wide transmittance within the visible to mid-infrared (MIR) region. However, titanoniobate glasses also tend to crystallize easily, significantly limiting their applications in optical glasses due to processing challenges. Therefore, the 30La2O3-40TiO2-(30鈭抶) Nb2O5-xAl2O3 (LTNA) glass system was successfully synthesized using a aerodynamic containerless technique, which improves glass thermal stability and expands the glass-forming region. The effects of Al2O3 on the structure, thermal, and optical properties of base composition glasses were investigated by XRD, DSC, NMR, Raman spectroscopy, and optical measurements. DSC results indicated that as the content of Al2O3 increased, the thermal stability of the glasses and glass-forming ability increased, as the 30La2O3-40TiO2-25Nb2O5-5Al2O3 (Nb-Al-5) glass obtained the highest 螖T value (103.5掳C). Structural analysis indicates that the proportion of [AlO4] units increases gradually and participates in the glass network structure to increase connectivity, promoting more oxygen to become bridging oxygen and form [AlO4] tetrahedral linkages to [TiO5] and [NbO6] groups. The refractive index values of amorphous glasses remained above 2.1 upon Al2O3 substitution, and a transmittance exceeding 65% in the visible and mid-infrared range. The crystallization activation energies of 30La2O3-40TiO2-30Nb2O5 (Nb-Al-0) and Nb-Al-5 glasses were calculated to be 611.7 and 561.4聽kJ/mol, and the Avrami parameters are 5.28 and 4.96, respectively. These results are useful to design new optical glass with good thermal stability, high refractive index and low wavelength dispersion for optical applications such as lenses, endoscopes, mini size lasers, and optical couplers. 漏 2021 American Ceramic Society |
| 学科主题 | Titanium Dioxide |
| 项目编号 | The authors gratefully acknowledge the critical comments of Nick Stone‐ ; Weiss, Rutgers University, USA, for his suggestions and corrections of the manuscript. This work was supported by the National Key Research and Development Program of China (No. 2016YFC0700905) and the National Natural Science Foundation of China (Grant No.51674232). |
| 出版者 | Blackwell Publishing Inc. |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/60311]  |
| 作者单位 | 1.State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China 2.National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China 3.School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, China |
| 推荐引用方式 GB/T 7714 | Yang, Jun,Li, Jianqiang,P., Lu. Understanding the structure, thermal, and optical properties in Al2O3-incorporated La2O3-TiO2-Nb2O5 glasses[J]. Journal of the American Ceramic Society,2021,104(6):2539-2551. |
| APA | Yang, Jun,Li, Jianqiang,&P., Lu.(2021).Understanding the structure, thermal, and optical properties in Al2O3-incorporated La2O3-TiO2-Nb2O5 glasses.Journal of the American Ceramic Society,104(6),2539-2551. |
| MLA | Yang, Jun,et al."Understanding the structure, thermal, and optical properties in Al2O3-incorporated La2O3-TiO2-Nb2O5 glasses".Journal of the American Ceramic Society 104.6(2021):2539-2551. |
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来源：过程工程研究所
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