A study on the stability of a PZT precursor solution based on the time evolution of mean particles size and pH

作者：Suarez Gomez A^*; Saniger Blesa J M; Calderon Pinar F

来源：Materials Chemistry and Physics, 2010, 123(1): 304-308.

DOI：10.1016/j.matchemphys.2010.04.017

• Nanostructures
• Organometallic compounds
• Light scattering
• Ageing

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.

• 出版日期2010-9-1