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Growth and properties of ytterbium doped KY(WO4)2 nanocomposites |
| Mieczyslaw T. Borowiec 1, Andrzej Deptuła 2, Witold Łojkowski 3, Stanisław Gierlotka 3, Vladimir P. Dyakonov 1, Wieslawa Lada 2, Tadeusz Olczak 2, Danuta Wawszczak 2, Pavlo Aleshkevych 1, Wiktor Domuchowski 1, Tetyana Zayarnyuk 1, Marek Baranski 1, Henryk Szymczak 1 |
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1. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland |
| Abstract |
Nanocomposites (nanocrystals) of KY(WO) and KY(WO)+1% mol Yb have been synthesized using a Complex Sol-Gel Process (CSGP). The chemical treatment with concentrated nitric acid and hydrogen peroxide was used to decrease the decarbonisation temperature. The expected monoclinic phase C2/c of the KYW of the nanocomposite powder has been confirmed using XDR technique. From the X-ray diffraction measurements, the unit cell parameters and the size of a nanoparticles have been determined. Electron spin resonance studies in the X band have been performed on KYW and KYW:Yb nanocrystals. The sintered samples were made with using the high pressure technique in the temperature up to 600oC. The chemical analysis, the X-ray diffraction measurements and ESR investigations were made for sintered samples too. |