Silicon iron peach pigment 510B in Mossbauer spectra was analyed,the results show that there are mainly two kinds of iron phase mineral existing in 510B pigment,α FeO(OH) and γ FeO(OH).The Mossbauer spectra of 5...Silicon iron peach pigment 510B in Mossbauer spectra was analyed,the results show that there are mainly two kinds of iron phase mineral existing in 510B pigment,α FeO(OH) and γ FeO(OH).The Mossbauer spectra of 510B sample after being calcined in 1200℃ was also analyzed.展开更多
Eu Mossbauer spectra of BaFBr:Eu phosphor are reported for the first time.The results show that f(Eu(2+) )<f(Eu(3+)) or <x2>Eu(2+)><x2>Eu(3+),which indicates that the attraction between phonons and E...Eu Mossbauer spectra of BaFBr:Eu phosphor are reported for the first time.The results show that f(Eu(2+) )<f(Eu(3+)) or <x2>Eu(2+)><x2>Eu(3+),which indicates that the attraction between phonons and Eu(2+) is stronger than that between phonons and Eu(3+),this may cause a faster increase of f(Eu=(2+)vs f(Eu(3+)) when temperature decreases as observed in the experiments.It is also found from Mossbauer investigation that when temperature decreases,the relative content of Eu(2+) decreases, while that of Eu(3+) increases.The temperature dependent Mossbauer spectra provide evidence for electron exchange or hopping between Eu(2+) or Eu(3+) sites in BaFBr lattice. The Mossbauer results are discussed and compared with the results of XPS and Photoluminescence studies.展开更多
文摘Silicon iron peach pigment 510B in Mossbauer spectra was analyed,the results show that there are mainly two kinds of iron phase mineral existing in 510B pigment,α FeO(OH) and γ FeO(OH).The Mossbauer spectra of 510B sample after being calcined in 1200℃ was also analyzed.
文摘Eu Mossbauer spectra of BaFBr:Eu phosphor are reported for the first time.The results show that f(Eu(2+) )<f(Eu(3+)) or <x2>Eu(2+)><x2>Eu(3+),which indicates that the attraction between phonons and Eu(2+) is stronger than that between phonons and Eu(3+),this may cause a faster increase of f(Eu=(2+)vs f(Eu(3+)) when temperature decreases as observed in the experiments.It is also found from Mossbauer investigation that when temperature decreases,the relative content of Eu(2+) decreases, while that of Eu(3+) increases.The temperature dependent Mossbauer spectra provide evidence for electron exchange or hopping between Eu(2+) or Eu(3+) sites in BaFBr lattice. The Mossbauer results are discussed and compared with the results of XPS and Photoluminescence studies.
