Green-emitting phosphors doped with Ce and Tb have been synthesized for the first time by reaction of BPO 4, prepared in our laboratory,with rare earth oxides. It is qualitatively accounted for that the prepared phosp...Green-emitting phosphors doped with Ce and Tb have been synthesized for the first time by reaction of BPO 4, prepared in our laboratory,with rare earth oxides. It is qualitatively accounted for that the prepared phosphors belong to borophosphate,and replacement of P with B doesn’t cause variation of monoclinic crystal system of orthophosphate.XRDs of the samples prepared at different temperatures show that the product is formed at 850℃.The primary investigation of luminescent of phosphors indicates that with the increment of Tb content,the brightness and purity of luminescent will be improved.展开更多
The low heat solid state reaction method for the synthesis of functional material lanthanum phosphate was studied,and the target product was obtained successfully with La(NO3)3·6H2O and(NH4)3PO4·3H2O as raw ...The low heat solid state reaction method for the synthesis of functional material lanthanum phosphate was studied,and the target product was obtained successfully with La(NO3)3·6H2O and(NH4)3PO4·3H2O as raw materials and PEG-400 as surfactant via the low heat solid state reaction.Crystallization calculated with XRD data of the product was used as the testing index,and application of uniform experimental design as well as data mining technology were used in the test.The synthesis tests were performed under the guidance of the results of data mining technology.The test results indicated that the product synthesized with the optimal technical condition was LaPO4·0.5H2O with the size of 23 nm and crystallization of 97.8%.TG/DTA analysis results indicated that LaPO4 could be obtained from dehydration of LaPO4·0.5H2O at 300℃.展开更多
文摘Green-emitting phosphors doped with Ce and Tb have been synthesized for the first time by reaction of BPO 4, prepared in our laboratory,with rare earth oxides. It is qualitatively accounted for that the prepared phosphors belong to borophosphate,and replacement of P with B doesn’t cause variation of monoclinic crystal system of orthophosphate.XRDs of the samples prepared at different temperatures show that the product is formed at 850℃.The primary investigation of luminescent of phosphors indicates that with the increment of Tb content,the brightness and purity of luminescent will be improved.
文摘The low heat solid state reaction method for the synthesis of functional material lanthanum phosphate was studied,and the target product was obtained successfully with La(NO3)3·6H2O and(NH4)3PO4·3H2O as raw materials and PEG-400 as surfactant via the low heat solid state reaction.Crystallization calculated with XRD data of the product was used as the testing index,and application of uniform experimental design as well as data mining technology were used in the test.The synthesis tests were performed under the guidance of the results of data mining technology.The test results indicated that the product synthesized with the optimal technical condition was LaPO4·0.5H2O with the size of 23 nm and crystallization of 97.8%.TG/DTA analysis results indicated that LaPO4 could be obtained from dehydration of LaPO4·0.5H2O at 300℃.
