SciELO - Scientific Electronic Library Online

vol.16 issue1Preparation of ZnO film on p-Si and I-V characteristics of p-Si/n-ZnOThe use of PLDLA/PCL-T scaffold to repair osteochondral defects in vivo author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Materials Research

Print version ISSN 1516-1439


MARQUES, Carolina Hernandes; MESQUITA, Alexandre; ARAUJO, Vinicius Dantas  and  BERNARDI, Maria Inês Basso. Influence of the pH on Al2O3:CuO pigments prepared by a polymeric precursor method. Mat. Res. [online]. 2013, vol.16, n.1, pp.100-104.  Epub Nov 02, 2012. ISSN 1516-1439.

Copper (II) aluminate, CuAl2O4, which is known to be an inverse spinel contains a d9 metal ion and possesses interesting electronic, magnetic and catalytic properties and is used in industry as ceramic pigments, coatings and catalysts. Al2O3 with 10 mol% Cu (AlCu10) was synthesized by the polymeric precursor method varying the pH of the precursor solution with addition of ammonium hydroxide and ethylenediamine. It was shown that the pyrolysis of the polymeric chain occurs in higher temperatures for samples prepared in higher values of pH. The colorimetric coordinates exhibit dependence with pH and with the increase of annealing temperature. AlCu10 samples prepared with higher values of pH present lower values of colorimetric coordinates, indicating alterations in its color. The luminosity parameters L* increase also as a function of pH.

Keywords : Al2O3 :CuO; pigments; polymeric precursor method.

        · text in English     · English ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License