# Influence of Oxygen-Release Material Doping on the Optical Properties of La1–xSrxTiO3+δ

## TL;DR

This paper explores how adding oxygen-release material improves the optical properties of a ceramic material at high temperatures.

## Contribution

The study introduces CeO2 doping to suppress oxygen vacancies and preserve optical properties in high-temperature ceramics.

## Key findings

- Adding 10 wt.% CeO2 reduces oxygen vacancies and impurity levels in La1–xSrxTiO3+δ.
- Sintering at 1450 °C improves reflectivity by reducing pore structures.
- The approach shows potential for maintaining optical properties in high-reflection ceramics under high temperatures.

## Abstract

This study focuses on addressing the reflectivity reduction issue in La1–xSrxTiO3+δ during high-temperature preparation, which is caused by oxygen vacancy generation. Bulk samples of CeO2-doped La1–xSrxTiO3+δ with varying doping contents as a second phase and sintering temperatures were prepared. The phase composition, reflectivity, and valence states were thoroughly investigated. Introducing 10 wt.%CeO2 significantly suppressed the formation of oxygen vacancies. Thus, the occurrence of impurity levels caused by oxygen vacancies was reduced. This can further mitigate the reflection decrease caused by impurity levels as photon absorption traps. Additionally, the reduced pore structure achieved at 1450 °C contributed to improved reflectivity compared to pure La1–xSrxTiO3+δ. The findings suggest that this approach has great potential for reducing oxygen vacancies sensitivity in high-reflection ceramics under high-temperature conditions and preserving their optical properties.