Method for coloring up sintered glass-ceramic

Abstract

A process for colouring the sintered microcrystal glass includes adding one or more high-temp inorganic pigments to the smelted color-less glass blocks, pulverizing, mixing, smelting at 1200-1350 deg.C, quenching in water to obtain blocks, shaping, and sintering for crystallizing. Its advantages are rich colors and uniform and stable color.

Description

technical field [0001] The invention relates to the technical field of glass-ceramics, in particular to a coloring method for sintered glass-ceramics. Background technique [0002] The Chinese building materials science and technology journal "Ceramics" publicly pointed out in the article "Production and Coloring of Sintered Glass-ceramics" published on page 18 of the second issue in 2002: the chemical composition of the basic glass of "sintered glass-ceramics" is (weight percent ): [0003] SiO 2 50-65%; AL 2 o 3 5~10%; CaO 15~25%; B 2 o 3 0~5%; ZnO+BaO 5~10%; K 2 O+Na 2 o 3 3-8%. [0004] At present, there are two coloring processes of "sintered glass-ceramics": [0005] (1) One-time coloring process, also known as glass body coloring, is to mix the colorant and basic glass batch together, melt it at 1450℃~1550℃ and water quench to make colored glass particles, and then sinter it according to the conventional method Glass-ceramic technology, after paving and...

AI Technical Summary

Problems solved by technology

The main disadvantage of this process is that when using colorants with variable valence metal ions, it is difficult to control the relative content of ions in different valence states, which may cause inconsistencies in the color of the glass before and after crystallization

Although this process solves the problem of chromatic aberration caused by the change of the valence state of the variable valence metal ion due to melting, it still has the following main disadvantages: the preparation quality of the toner is high, otherwise it will affect the color of the crystallized glass-ceramic plate, such as Uneven coloring, defects such as unsightly spots

Furthermore, if the crystallization firing time is too short, the toner is not easy to penetrate into the colorless glass frit, and it is difficult to quickly fire in the roller kiln.