Structural and optical properties of Tm:Y2O3 transparent ceramic with La2O3, ZrO2 as composite sintering aid

Fabrication of transparent La-doped Y2O3 ceramics using different La2O3 precursors

“…Owing to their low infrared emissivity at both ambient and elevated temperatures, Y 2 O 3 ceramics are considered as a candidate material for use in hypersonic guided-missile windows and domes [4][5][6][7]. The use of La 2 O 3 permits the attainment of ceramics with high optical quality and good mechanical properties by eliminating pores and inhibiting grain growth during the Y 2 O 3 ceramic sintering process [8][9][10]. However, La 2 O 3 rapidly absorbs moisture and carbon dioxide from air to form hydroxides and hydroxycarbonates [11,12], which makes it more difficult to maintain an exact weight during the weighing process.…”

Optical and thermal properties of TiO2‐doped Y2O3 transparent ceramics synthesized by hot isostatic pressing

“…The size distribution and average grain size were obtained by analyzing the SEM images using Nano Measurer 1.0 (Department of Chemistry, Fudan University). A coefficient of 1.56 was used as the multiplying factor to obtain the average grain size in the present study . EDS was used in conjunction with SEM to identify the chemical compositions of the inner grains and grain boundaries.…”

Up- and Downconversion Luminescence in Ho³⁺,Yb³⁺-Co-Doped Y₂O₃ Transparent Ceramics Prepared by Spark Plasma Sintering

“…Transparent ceramics are commonly manufactured using sintering aids, which govern the microstructure of these ceramics and can be used to increase their optical quality and promote densification. For example, the use of La 2 O 3 in the sintering of Y 2 O 3 ceramics results in improved transmissivity, as the former oxide induces grain growth and promotes densification by increasing grain boundary mobility [28] and thereby facilitates the annihilation of oxygen vacancies between grain boundaries [29].…”