کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1525058 | 995346 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A study on the stability of a PZT precursor solution based on the time evolution of mean particles size and pH A study on the stability of a PZT precursor solution based on the time evolution of mean particles size and pH](/preview/png/1525058.png)
The stability of lead titanate zirconate (PZT) precursor solutions is analyzed by taking into account the time evolution of their particles size distributions and pH. Solutions were synthesized by a hybrid sol–gel route carefully chosen in order to attain the maximum coordination number for all of the (Zr/Ti)4+ cations involved in the chemical reaction. Dynamic light scattering (DLS) and pH measurements were carried out for samples up to 4 months old and some noticeable features were detected in all cases: i.e. mean particles size (〈d〉) was well below 10 nm, particles size distribution functions tend to become unimodal only after a few days from synthesis and, after some time, the pH evolution seems not to influence the values of mean particles size. DLS results were also used to formulate a fairly accurate physical description of our systems on the basis of the classical Smoluchowski theory for colloidal dispersions in the approximation of van Dongen–Ernst.
Journal: Materials Chemistry and Physics - Volume 123, Issue 1, 1 September 2010, Pages 304–308