Study On The Thermal Quenching Performance Performance Of Ion Doped Sodium Zirconium Phosphate Matrix Material

The sodium zirconium phosphate(NaZr₂P₃O₁₂,NZP)matrix family material is featured with its unique three-dimensional structure consrucuted by corner-connected tetrahedral?PO₄?and octahedral?ZrO₆?,and shows wide applications in zero-negative thermal expansion material and sodium super-ion conductor?NASICON?and other fields.The rare earth doped NZP family compounds served as luminescent materials have also being explored recently,primarily attracted by its outstanding merit in high thermal stability in luminescent properties.The effects of different rare earth ion doping concentrations and ion substitution on the luminescence properties of NZP family luminescent materials were investigated.The main achievments obtained in this thesis are as follows:1.Phase evolution regulates the thermal quenching behavior of Na₃Sc₂?PO₄?₃:Eu²⁺luminescent materials.The phase composition of Na₃Sc₂?PO₄?₃:Eu²⁺phosphor and the relationship between phase transition characteristics and thermal quenching properties during heating were investigated.The observed abnormal negative-thermal quenching,zero-thermal quenching and normal thermal quenching behaviors were found to be attributed to the events of phase transition during heating process,which could suppress the non-radiative paths by consuming thermal energy.2.The substitution of Na⁺-Sc³⁺ion pair for Zr⁴⁺increases the crystal structure density of NaZr₂?PO₄?₃:Eu²⁺luminescent material,resulting in the improvement of thermal quenching performance of the material.As Zr⁴⁺is replaced by Sc³⁺in the NaZr₂?PO₄?₃ lattice,the paired sodium ions act as charge compensators to occupy vacancies,resulting in an increase in the crystal structure density of the material.The results of the study indicate that the Stokes shift of the cerium ion activator is reduced in the higher density structure and results in a significant improvement in luminous efficiency and thermal stability3.The effect of equivalent ion substitution on the thermal quenching performance of Na₃Sc₂?PO₄?₃:Eu²⁺luminescent materials was investigated.The results show that the appropriate equivalent substitution of the Sc position can improve the thermal stability of the material,and the equivalent substitution of the Na position leads to a decrease in the thermal stability of the material.4.The effect of unequal ion substitution on the thermal quenching performance of Na₃Sc₂?PO₄?₃:Eu²⁺luminescent materials was investigated.The results show that the appropriate amount of non-equivalent substitution of P sites can improve the thermal stability of the material,and the unequal substitution of the Sc site leads to a decrease in the thermal stability of the material.