Title: The effect of anion NO³⁻/SO₄²⁻/F⁻ on the optical performance and chroma index of glass coloured by cobalt

Authors: Xiaohua Bai; Shumei Gao; Weiwei Chen

Addresses: Department of Material Science and Technology, Luoyang Institute of Science and Technology, Luoyang 471023, China ' Chengdu Metro Co., Ltd., Chengdu 610031, China ' Department of Geological Engineering, Southwest Jiaotong University, Chengdu, 610031, China

Abstract: The goal of this project is to study the effects of anion on the optical performance and chroma index of cobalt colour glass. In this paper the effect of anions NO³⁻, SO₄²⁻ and F⁻ will be studied on the optical performance and chroma index of this blue melted glass coloured by cobalt. This blue glass is to be produced from the glass raw material, Na₂O-CaO-SiO₂, as fundamental material with addition of cobalt oxide (CoO) in combination as colorants. The analysis of spectrum transmittance and chroma index has been carried out on the plates of this blue glass by spectrophotometer SP-1920. Results indicate that the optical performance and chroma index of this blue melted glass largely depend on the factors such as nitrate ion, sulphate ion and fluorine ion.

Keywords: anions; optical performance; chroma index; cobalt glass; blue glass; blue melted glass; nitrate ion; sulphate ion; fluorine ion.

DOI: 10.1504/IJMMP.2014.067317

International Journal of Microstructure and Materials Properties, 2014 Vol.9 No.6, pp.525 - 531

Published online: 04 Feb 2015 *

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