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Large-sized La2O3-TiO2-SiO2 Amorphous Oxide Fabricated by Hot Press Sintering
Li Ren-Yi1,2; Li Xiao-Yu2; Li Jian-Qiang2; Zhao Jian-Ling1; Ma Xiao-Guang2; He Gang3; Li Jiang-Tao3

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.

KeywordAmorphous Oxide Aerodynamic Levitation Hot-press Sintering Large-size Densification
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordOptical-properties ; Glass ; Nanoceramics ; Transparent ; Alumina
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000405927500011
Citation statistics
Document Type期刊论文
Affiliation1.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
GB/T 7714
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.
APA Li Ren-Yi.,Li Xiao-Yu.,Li Jian-Qiang.,Zhao Jian-Ling.,Ma Xiao-Guang.,...&Li Jiang-Tao.(2017).Large-sized La2O3-TiO2-SiO2 Amorphous Oxide Fabricated by Hot Press Sintering.JOURNAL OF INORGANIC MATERIALS,32(8),851-856.
MLA Li Ren-Yi,et al."Large-sized La2O3-TiO2-SiO2 Amorphous Oxide Fabricated by Hot Press Sintering".JOURNAL OF INORGANIC MATERIALS 32.8(2017):851-856.
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