Mg doping effect on high-pressure behaviors of apatite-type lanthanum silicate

Structural phase transition and photoluminescence properties of wurtzite CdS:Eu3+ nanoparticles under high pressure

“…Similar results have been reported. 34,35 Meanwhile, the bulk modulus of RS CdS NPs is lower than the RS CdS:Eu NPs.…”

Pressure-induced structural evolution of apatite-type La 9.33 Si 6 O 26

“…Recently, we used in situ synchrotron x-ray diffraction (XRD) to investigate ATLS under high pressure to investigate the structural evolution and corresponding structural formation/alteration mechanism of ATLS under external forces. [28,29] We found that the flexibility of the apatite structure was mainly dominated by the isolated SiO 4 tetrahedra and that the compressibility was mainly dominated by the La-O polyhedral environment. [29] Moreover, we found that for the ATLS, similar to what happens in scheelite-type ABO 4 compounds, doping the Si sites with a larger cation (e.g., Mg 2+ ) increased the r SiO 4 /r La ratio, thus enhancing the P T and lowering the axial compressibility of the ATLS.…”

“…[29] Moreover, we found that for the ATLS, similar to what happens in scheelite-type ABO 4 compounds, doping the Si sites with a larger cation (e.g., Mg 2+ ) increased the r SiO 4 /r La ratio, thus enhancing the P T and lowering the axial compressibility of the ATLS. [28] However, previous studies mainly focused on ATLS with interstitial oxygen atoms, so the detailed structural alteration mechanism of ATLS has not been rigorously determined because of the lack of comparative data to illuminate the effect of interstitial oxygen atoms on the structural evolution of ATLS under compression. Therefore, it is crucial to study in detail the behaviors of stoichiometric oxygen-interstitial-free ATLS (La 9.33 Si 6 O 26 ) under high pressure to gain insight into the structural properties of ATLS.…”

Low-temperature synthesis of apatite-type La 9.33 Ge 6 O 26 as electrolytes with high conductivity

“…Apatite-type lanthanum silicates (ATLS) and apatitetype lanthanum germanates (ATLG), as novel electrolytes for the intermediate temperature solid oxide fuel cells (IT-SOFCs), [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] have been attracting widespread attention of the scientific community due to their clean energy conversions, superior ionic conductivities, excellent long-term stabilities and low processing cost. In contrast to the fact that traditional fluorite and perovskite-type oxide ion conductors have a vacancy conduction mechanism, [16][17][18] apatite-type materials have an especial interstitial oxide ion conduction mechanism, [19,20] which could be responsible for their high oxide-ion conductivities.…”