Z 90 Zuev, M. G. Research of nanopowders properties of new x-ray contrast substances and the phosphors produced by a method of pulsed electron beam evaporation / M. G. Zuev, V. G. Il`ves , S. Yu. Sokovnin // Известия высших учебных заведений. Физика. - 2012. - Т. 55, № 12-3. - С. 223-226 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ПУЧКИ ЭЛЕКТРОНОВ -- НАНОПОРОШКИ -- РЕНТГЕНОКОНТРАСТНЫЕ ПРЕПАРАТЫ 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. |