The Effect of ZnO Addition on Microstructure, Phase and Color Developments of Copper Reduction Glaze

  • N. NayebPashaee
  • A.M. Aarabi
  • H. Sarpoolaky
  • H. Vafaeenezhad
Keywords: Reduction glazes, brass alloy, uncontrolled atmospheres, Willemite.

Abstract

In this research, the effects of Zn on microstructure and color developments of the copper reduction glaze were investigated. Structural and colorimetric characteristics of the glaze surface are examined by X-ray diffraction, scanning electron microscope (SEM) equipped with electron dispersive spectroscopy (EDS) and Telespectrophotometery. Results indicate in samples consisted of more than 7 % of zinc amount, crystalline structures containing Willemite and synthesized copper. XRD indicate that, 14 wt% of zinc oxide is enough to form Willemite. In all samples, duration of process was sufficient to form the metallic particles. SEM images confirm presence of copper nanosphere-laths of Willemite and surrounding glaze.

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