Preparation of environmentally friendly high‐emissivity Ca²⁺‐Fe³⁺ co‐doped LaAlO₃ ceramic

Abstract

Ca 2+ -Cr 3+ co-doped LaAlO 3 is an excellent ceramic material with high emissivity; however, it is harmful to the environment because of the presence of Cr 3+ ions. In this study, Ca 2+ -Fe 3+ co-doped LaAlO 3 ceramic materials were successfully prepared via a high-temperature solid-state reaction. The emissivity of Ca 2+ -Fe 3+ co-doped LaAlO 3 was 0.91, which is approximately equal to that of Ca 2+ -Cr 3+ co-doped LaAlO 3 . To compensate for the lack of data on the thermophysical properties of doped LaAlO 3 high-emissivity ceramics, the thermal expansion coefficients and thermal conductivities of LaAlO 3 doped with Ca 2+ -Fe 3+ or Ca 2+ -Cr 3+ were investigated. The thermal conductivities of La 0.

Optimizing the Structure and Optical Properties of Lanthanum Aluminate Perovskite through Nb5+ Doping

“…Its high melting point [1][2][3], chemical stability [4,5], and large band gap (3.8 eV) [6][7][8] make it a promising material for various applications. If the radius of the doping ion is close to La 3+ or Al 3+ , LaAlO 3 , an essential cubic perovskite oxide, can be doped with significant concentrations of ions through substitution [9][10][11][12]. Due to its strong optoelectronic capabilities, the B site held by Al 3+ can be replaced by transition metal ions to produce a variety of applications, including photodetector [13,14] and luminescent phosphor [15,16], which have been reported in numerous papers.…”