ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The aim of the work was to examine the influence of pH, high power ultrasound,surfactant and dopant quantity on the particle size distribution of ZrO2:Pr3+, with praseodymiumcontent varying between 0.05 and 10 %. The nanopowders were obtained via a hydrothermalmicrowave driven process. To establish if the dopant was located on the surface of the zirconiananoparticles, the particle size distribution, as a function of pH, was measured to obtain an estimateof the isoelectric point of the samples. All results indicated that the dopant was concentrated on thesurface: the measurements of the particle size distribution show that the pH corresponding tomaximum average particle size changes towards higher values when the Pr content increases.Measurements of the particle size distribution dependency on the application of high powerultrasound and the addition of the sodium dodecyl sulphate surfactant show that, under certainconditions, there is a better stabilisation of the nanopowders in a dispersion and undesirableagglomeration is hindered
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.128.97.pdf
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