Potassium europium molybdate phosphate

Mechanical, Dielectric, and Spectroscopic Characteristics of “Micro/Nanocellulose + Oxide” Composites

“…Doped with luminescent europium three charged ions, the Eu 3+ complex oxide compound, K 2 Eu(PO 4 )(MoO 4 ), was used as the oxide component of the composites. These powdered micro/nanosized compounds with various content of the Eu 3+ ions have been synthesized and studied previously [ 22 – 24 ]. These compounds revealed intensive structured photoluminescence (PL) related to the intrinsic radiation transition in the f-f electronic shell of the Eu 3+ ions.…”

Crystal growth, layered structure and luminescence properties of K2Eu(PO4)(WO4)

“…21,22 Thus, anionic ratio MoO 4 2À /PO 4 3À for Na 2Àn Y(MoO 4 ) 1+n (PO 4 ) 1Àn : Tb 3+ ,Eu 3+ has been used for improving the thermal stability of phosphors obtained. 22 In this light one should admit signicant difference in excitation and luminescence spectra for isostructural hosts containing molybdate 15,21,23 and tungstate groups. 24,25 To clarify this phenomenon more spectral data for phosphotungstates should be collected and analysed.…”

“…Thermal analysis K 2 Eu(PO 4 )(WO 4 ) is characterized by high thermal stability in the temperature range of 20-900 C with slight weight loss less than 0.65% most probably explained by adsorbed water. Taking into consideration that melting point of K 2 Eu(PO 4 )(MoO 4 ) 15 is above 1050 C, the thermal stability of the tungstate-containing analogue may be expected to be higher.…”

Structural and optical properties of langbeinite-related red-emitting K2Sc2(MoO4)(PO4)2:Eu phosphors

“…The average particles' size increase can be related with the melting-point depression when the Eu content increases. It had been shown for mixed potassium-europium molybdatephosphate powder to melt at 1050 C. 18 On the contrary, K 2 -Sc 2 (MoO 4 )(PO 4 ) 2 is thermally stable at more than 1200 C. 13 The SEM-EDS analysis performed for the samples with x ¼ 0.1 ( Fig. 2e) and 1.0 ( Fig.…”