RESEARCH OF NANOPOWDERS PROPERTIES OF NEW X-RAY CONTRAST SUBSTANCES AND THE PHOSPHORS PRODUCED BY A METHOD OF PULSED ELECTRON BEAM EVAPORATION

Результат исследований: Вклад в журналСтатья

Аннотация

For the first time using pulsed electron evaporation were produced nanopowders of YTaO 4, LaTaO 4 X-ray contrast substances and phosphors Sr 2Y 8(SiO 4) 6O 2:Eu with oxyapatite structure with a specific surface to 184 m 2/g. Characteristics nanopowders were studied by methods of XRD, electronic microscopy of the high permission, electrongraphy, pulsed cathodeluminescence and photoluminescence. The analysis of a photoluminescence spectrum of phosphor has shown that the luminescence spectrum has changed in comparison with a micropowder of the same structure. The Eu 3+ luminescence spectrum containes smaller number of lines, than Eu 3+ spectrum of the micron size particles. Besides the shift of spectral lines was observed. There was also a reduction of intensity red and increase orange spectrum lines. After roasting on the air the nanophosphor spectrum of luminescence Eu 3+ has coincided with that one for microparticles. Thus, the effect of quantum restriction on position of power levels was observed, apparently. The size of particles of a phosphor has influenced its spectral structure. X-ray contrast properties nanopowders researches were tested in odontology, essential influence, especially in 3D geometry is established.
Язык оригиналаАнглийский
Страницы (с-по)223-226
ЖурналИзвестия высших учебных заведений. Физика
Том55
Номер выпуска12-3
СостояниеОпубликовано - 2012

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