In this study, a series of Ca9Y(PO4)7 compounds doped with 5% of Eu ions and with different [Y]/[Ca] ratios was synthesized using the Pechini method.

The incorporation of aluminum ions into the Sr2SiO4:Eu causes the stabilization of the Eu3+ ions under reductive atmosphere and concentration ratio of europium in both oxidation states ([Eu3+]/[Eu2+]) can be controlled by changing the Al3+ content.

The luminescent material based on the strontium orthotitanate (Sr2TiO4) matrix doped with 1% of a mole of samarium was obtained using the typical solid-state synthesis method under a neutral atmosphere...

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