A novel transparent amorphous LaGaO3–Nb2O5 sphere with high refractive indices fabricated by containerless solidification. (31st October 2018)

• Record Type: Journal Article
• Authors: Li, Ying; Zhang, Xiaoyan; Qi, Xiwei; Zhang, Min; Gu, Yaohang; Zhu, Hongen
• Is Part Of: Materials research express. Volume 6:Number 1(2019)
• Publication Date: 2018-10-31
• Subjects: amorphous (1-x)LaGaO3-xNb2O5 spheres -- containerless solidification -- transparent -- high refractive indices; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aae919
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: A series of novel transparent and amorphous spheres (1- x )LaGaO3 - x Nb2 O5 ( x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.625, 0.650, 0.675) with high refractive indices were successfully synthesized through containerless solidification. In the range of 0 ≤ x ≤ 0.675, transparent samples diametered about 2–4 mm were produced. The glass transition temperature T g and the crystal onset temperature T x first rose and then reduced with rising x . The difference between T g and T x was Δ T = T x - T g . The Δ T curve exhibited two peaks at x = 0.2 and x = 0.6, with the maximum Δ T values of approximately 107 °C and 108 °C respectively. The refractive indices of the fabricated amorphous materials ranged from 2.00 to 2.45 with increasing x from 0.1 to 0.675 in the visible light range. The transmittances ranged from 82% to 71% with increasing x from 0 to 0.5 in the visible light range. Raman scattering spectra showed that the maximum phonon energy increased from 782 cm −1 to 815 cm −1 with rising x from 0 to 0.5. The as-prepared amorphous materials pave the way for developing novel optical components.