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题名:
Large-sized La2O3-TiO2-SiO2 Amorphous Oxide Fabricated by Hot Press Sintering
作者: Li Ren-Yi1,2; Li Xiao-Yu2; Li Jian-Qiang2; Zhao Jian-Ling1; Ma Xiao-Guang2; He Gang3; Li Jiang-Tao3
刊名: JOURNAL OF INORGANIC MATERIALS
出版日期: 2017-08-01
卷号: 32, 期号:8, 页码:851-856
关键词: amorphous oxide ; aerodynamic levitation ; hot-press sintering ; large-size ; densification
收录类别: SCI
WOS记录号: WOS:000405927500011
DOI: 10.15541/jim20160619
文章类型: Article
英文摘要: La2O3-TiO2 amorphous oxide has prospective applications because of its remarkable optical properties. However, due to its poor glass-forming abilities, it is difficult to prepare this material in a traditional way. The containerless solidification method can overcome this shortcoming, but the formed material size is generally restricted to be less than 10 mm. In order to obtain large-sized La2O3-TiO2 amorphous oxide, a small amount of SiO2 was added to the La2O3-TiO2 oxide system to form the amorphous oxide powders by aerodynamic levitation furnace. Subsequently, the high-density La2O3-TiO2-SiO2 materials were fabricated by vacuum hot press sintering. Compositions and microstructure properties were systematically studied by XRD and SEM. The results showed that SiO2 could improve the glass-forming ability of La2O3-TiO2. The raw powders made by aerodynamic levitation furnace were completely non-crystal, while the sintered samples had weak crystallization, which affected fully densification of sintered samples. There was a small amount of porosity in the high-density product made by vacuum hot press sintering. In addition, sintering densification mechanism of the La2O3-TiO2-SiO2 amorphous powders was analyzed. Finally, the optical property of hot pressed La2O3-TiO2-SiO2 material was investigated. It is found that La2O3-TiO2-SiO2 material still kepts high refractive index of above 2.2 in the visible light region. Small amount addition of SiO2 species improves the glass-forming abilities, yet decreases the refractive index slightly.
WOS标题词: Science & Technology ; Technology
类目[WOS]: Materials Science, Ceramics
研究领域[WOS]: Materials Science
关键词[WOS]: OPTICAL-PROPERTIES ; GLASS ; NANOCERAMICS ; TRANSPARENT ; ALUMINA
语种: 英语
ISSN号: 1000-324X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ipe.ac.cn/handle/122111/22984
Appears in Collections:湿法冶金清洁生产技术国家工程实验室_期刊论文

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作者单位: 1.Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China
2.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

Recommended Citation:
Li Ren-Yi,Li Xiao-Yu,Li Jian-Qiang,et al. Large-sized La2O3-TiO2-SiO2 Amorphous Oxide Fabricated by Hot Press Sintering[J]. JOURNAL OF INORGANIC MATERIALS,2017,32(8):851-856.
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