Effect of nickel oxide on crystallization and mechanical properties of MgO-Al2O3-SiO2-MoO3 glasses
Manuela Alejandra Zalapa Garibay
Ana María Arizmendi Morquecho
SIMON YOBANNY REYES LOPEZ
Summary or description
Crystallization is a well-recognized practical means of improving the brittleness of glass.
Many glass-ceramics have been investigated, and some have been incorporated into
practical materials. Glass-ceramics in the MgO–Al2O3–SiO2 (MAS) system have attracted
much interest on account of their superior mechanical and thermal properties, i.e., high
strength and stability at high temperatures.
To investigate the effect of nucleating agents, this study investigates the crystallization
behavior of an MgO–Al2O3–SiO2-MoO3 glass with high % wt molybdenum oxide and low
% wt nickel oxide addition. Under a not reducing condition, crystals formed in the bulk of
the super cooled liquids, whereas melting in air yielded only surface crystallization. The
purpose of using of Nickel oxide as nucleating to modify the mechanical properties, is
based on the manipulation of the grain size during the solidification process. The first
crystalline phase precipitated inside the glass was α-cordierite and β-cordierite in glasses
doped with nickel oxides. Nickel oxide yielded a finer microstructure of the glass-ceramic.
Fuente de Objetos Científicos Open Access