Synthesis and microstructures of La1−xCaxCrO3 perovskite powders for optical properties

Onset of Antiferromagnetic Insulator‐to‐Ferromagnetic Half Metal‐to‐Antiferromagnetic Metal Transitions in La1−xCaxCrO3 and their Microscopic Origin

“…Yimin et al showed the reduction in optical bandgap with increasing Ca substitution, substantiating our results, and reported its potential application in industry. [ 24 ] For 0.25 and 0.50 Ca substitution, only few energy bands cross the Fermi level, as shown in Figure 3b1−b4 and c1−c4, suggesting the onset of p‐type semiconducting nature. For lower substitution, that is, Ca on La site x ≥ 0.25, few bands cross the Fermi level, as shown in the electronic band diagram, Figure 3b1−b4 and c1−c4.…”

“…[23][24][25] Wan et al synthesized La 1Àx Ca x CrO 3 for 0 ≤ x ≤ 0.5 and studied its optical properties. [24] CaCrO 3 was synthesized under high pressure with Cr in 4þ state; it is expected that Ca compositions above x = 0.5 can be realized under high-pressure synthesis. [21,26] The present work intends to explore the magnetic ground state of complete La 1Àx Ca x CrO 3 (0 ≤ x ≤ 1) solid solution in orthorhombic crystallographic phase.…”

“…Various experimental attempts are made to synthesize Ca‐doped LaCrO 3 due to its applications in high thermal radiation, optical, and infrared emissivity. [ 23–25 ] Wan et al synthesized La 1− x Ca x CrO 3 for 0 x 0.5 and studied its optical properties. [ 24 ] CaCrO 3 was synthesized under high pressure with Cr in 4+ state; it is expected that Ca compositions above x = 0.5 can be realized under high‐pressure synthesis.…”

“…[ 23–25 ] Wan et al synthesized La 1− x Ca x CrO 3 for 0 x 0.5 and studied its optical properties. [ 24 ] CaCrO 3 was synthesized under high pressure with Cr in 4+ state; it is expected that Ca compositions above x = 0.5 can be realized under high‐pressure synthesis. [ 21,26 ]…”

High‐Performance Reticular Porous Perovskite Coating with Wide‐Spectrum Absorption for Photothermal Conversion

“…Generally, alkaline earth (such as Ca and Sr) and transition metal elements were used to replace La and Cr elements to improve the optical property. [ 17,18,22 ] For instance, Han et al synthesized the LaCrO 3 and La 0.8 Ca 0.2 CrO 3 powders and obtained the infrared emissivities of ≈0.71 and 0.95 of the LaCrO 3 and La 0.8 Ca 0.2 CrO 3 samples in the range of 3–5 μm, respectively. [ 18 ] As discussed, the LaCrO 3 ‐based functional materials are usually designed in the form of coating or film in many practical applications.…”