Study On Preparation And Properties Of SrO-Sb₂O₃-P₂O₃ System Low Melting Glasses

The formation region of SrO-Sb₂O₃-P₂O₅ ternary system glass was studied systemly.The influences of composition on the structure and properties of glasses were studied by changing relative contents of SrO and Sb₂O₃ with P₂O₅.The effects of oxide addition on the structure and properties of glasses were researched through adding Bi₂O₃ and Al₂O₃.Rare earth element Eu³⁺ was doped in the glass and luminescence properties changes of the glasses was studied through the nucleation and crystallization processing.The structure of glasses and the phase of crystallized glass were studied by FTIR and XRD,and the microscopic morphology of glasses was observed by using scanning electron microscope.The luminous performance of glasses was determined by fluorescence spectrophotometer.The expansion coefficient and characteristic temperatures of glasses were determined by high temperature horizontal dilatometer.The thermal performance parameters of the glasses were determined by DTA.Water resistence ability of glasses was determined by water bath heating method.Results indicate that:1.SrO-Sb₂O₃-P₂O₅ system glasses formation region was throughout the ternary phase diagram.The boundary of the forming regions start from P₂O₅ content is 55mol% in P₂O₅-SrO binary system,and extending horizontally with the increase of Sb₂O₃.When Sb₂O₃ content reaches 45 mol %,glass forming regions became smaller and border shrinks to the point of P₂O₅ content is less than 55 mol %.2.Using SrO part instead of P₂O₅ in x SrO-30Sb₂O₃-?70-x?P₂O₅ system glasses,there are obvious changes on the basic properties of the glasses.When SrO content is not more than 15mol%,various properties of the glasses gradually get better,and when SrO content is 15²5 mol%,glasses performances changed wrose.When SrO content is more than 25mol%,the characteristic temperatures,expansion coefficients,crystallization properties and stability are all improved.Using Sb₂O₃ part instead of P₂O₅ in 10 SrO-?20+x?Sb₂O₃-?70-x?P₂O₅ system glasses.When Sb₂O₃ content does not exceed 30mol%,glasses properties are improved.When Sb₂O₃ content more than 30mol%,the performances of the glasses became wrose.But when Sb₂O₃ content reaches 40mol%,glasses chemical stability is improved.3.15 SrO-30Sb₂O₃-55P₂O₅ glass is used as the basic glass.Using Bi₂O₃ and Al₂O₃ part instead of P₂O₅,P-O-Sb bond generates when Bi₂O₃ content is 2mol%.When Bi₂O₃ content is 2mol%,the density and expansion coefficient of the glass is sharply raised,and the crystallization ability is improved,and the characteristic temperatures are droped sharply,but chemical stability is increased.Using Al₂O₃ partly replacing P₂O₅,just as Al₂O₃ content increases from 0 to 1mol%,P-O-Sb bond generates and the density,characteristic temperature,and chemical stability are sharp droped,but with the increasing of Al₂O₃,the density of glass is decreased slow down while the characteristic temperatures and chemical stability are gradually improved.The expansion coefficient and crystallization properties are rapidly increased after adding Al₂O₃.But with the content of Al₂O₃ continue increased,the changes trend gradual.4.Eu³⁺ doped 25Sro-30Sb₂O₃-45P₂O₅ glasses was nucleated under 500 ? and crystallized under 600? for 2 hours.The crystalline phase Sb PO₄ generated and the grain size was about 100 nm.The excitation spectra and emission spectra of glasses are enhanced obviously after nucleation and crystallization,also the luminous intensity of the glasses after nucleation is strongest.