Structural and Optical Properties of La1−xSrxTiO3+δ

Abstract

La1−xSrxTiO3+δ has attracted much attention as an important perovskite oxide. However, there are rare reports on its optical properties, especially reflectivity. In this paper, its structural and optical properties were studied. The X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and spectrophotometer were used to characterize the sample. The results show that with increasing Sr concentration, the number of TiO6 octahedral layers in each “slab” increases and the crystal structure changes from layered to cubic structure. A proper Sr doping (x = 0.1) can increase the reflectivity, reaching 95% in the near infrared range, which is comparable with metal Al measured in the same condition. This indicates its potential applications as optical protective coatings or anti-radiation materials at high temperatures.

Preparation and Electrical Properties of La0.9Sr0.1TiO3+δ

“…Our previous theoretical simulated work has suggested that La 0.9 Sr 0.1 TiO 3+δ has higher dielectric function and refractive index [9]. Our following experimental research has confirmed that La 0.9 Sr 0.1 TiO 3+δ has the highest reflectivity (99% at 10.6 μm) [10].…”

“…Banno optimized [13] the formula between porosity and dielectric properties of the material, which indicates that lower porosity and less grain boundary make higher dielectric constant. Therefore, with our previous work [9], we think the dielectric properties of LST, which have layered perovskite structure and higher density, may be improved.…”

Ablation Behavior of Plasma-Sprayed La1–xSrxTiO3+δ Coating Irradiated by High-Intensity Continuous Laser

“…The perovskite La 1– x Sr x TiO 3+δ (LST) has attracted considerable attention because of its excellent physical and chemical properties. − It has potential applications in the areas of acoustics, electricity, and optics. , At present, studies on LST materials have mainly focused on the high electrical conductivity, good magnetic properties, and high transmittance of these materials, and some of these studies have made significant breakthroughs. , For instance, Suzuki and Yun et al reported that an LST thin film has a transmittance higher than 80% in the visible wavelength range. However, most of the studies have focused on the high transmittance of LST bulk materials and LST thin films instead of LST thick coatings.…”

“…1−5 It has potential applications in the areas of acoustics, 6 electricity, 7 and optics. 8,9 At present, studies on LST materials have mainly focused on the high electrical conductivity, good magnetic properties, and high transmittance of these materials, and some of these studies have made significant breakthroughs. 10,11 For instance, Suzuki 8 and Yun 12 et al reported that an LST thin film has a transmittance higher than 80% in the visible wavelength range.…”

Catalisadores do tipo perovskita La>sub<2>/sub<Ti>sub<2>/sub<O7 substituídos com Sr, Ce e Mg aplicados na reação de acoplamento oxidativo do metano

“…Isso pode estar relacionado ao aumento da quantidade de nitrato proveniente da adição do nitrato de magnésio em substituição ao isopropóxido de titânio durante a síntese desses materiais. ZHANG et al, 2007;HAVELIA et al, 2008;GAO et al, 2014). Os perfis de dessorção de CO2 podem ser divididos de acordo com a força dos sítios básicos, que podem ser atribuídas a três categorias diferentes de acordo com as faixas de temperatura de dessorção: abaixo de 300 °C, entre 300-600 °C e acima de 600 °C, que podem ser associadas à sítios básicos fracos, moderados e fortes, respectivamente (HAO et al, 2021;XU et al, 2021).…”