Heat-Resistant Ceramic Pigments on the Base of Waste Vanadium Catalyst and Alumina

Abstract

Ceramic pigments on the base of technogenic silica-containing material—waste vanadium catalyst were obtained in this work. Corundum is identified along with the predominant mullite phase in the composition of pigments. The ions of nickel, chromium, and iron are embedded in the structure if the concentration of the corresponding oxide in the initial mixture does not exceed 10 wt.%. In this case, the oxide is not identified in a free form according to the results of X-ray diffraction analysis. Spinel CoAl2O4is formed in cobalt pigments. The developed pigments keep the firing temperature up to 1200°C. The obtained pigments may be recommended for ceramic paints and colored glazes for building materials.

Design of alumina/β-eucryptite composite from alum sludge waste: physical properties, phase composition and coefficient of thermal expansion

“…The solid waste can be recovered and turned into pure aluminum compounds, which is one of the key goals of the study's alum sludge recycling method. The accumulation of huge amounts of solid waste that can be utilized for a variety of purposes has become a source of environmental concern, particularly in the construction industry, ceramics, and pigment manufacturing [11][12][13].…”

“…The β-eucryptite is a hexagonal quartz structure, in which half of the Si 4+ ions are replaced by trivalent aluminum ions. The incorporation of mono valent lithium ions in the (Si, Al)O4 framework neutralizing the charge [11]. Its thermal expansion coefficients (CTE) are highly isotropic (a: 7.26 x 10 -6 deg -1 ; c: -16.35 x 10 -6 deg -1 ) [19].…”

Pigments based on blast furnace slag from waste water

“…Also sphene, apatite and nepheline concentrates-based pigments were obtained. [8] In [9] ceramic pigments synthesis used vanadium-containing catalyzates were used.…”