Maroon to sell chromium oxide green pigments for Elementis

2019 ◽  
Vol 2019 (7) ◽  
pp. 7
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gerhard Pfaff

Abstract The chromium(III) oxide pigments Cr2O3 (chromium oxide green) and CrOOH (chromium oxide hydrate green) are representatives of the inorganic green and blue–green pigments. Cr2O3 pigments are very important for the coloration of paints, coatings, plastics, building materials and other application systems. CrOOH pigments have lost their technical importance because of the low thermal stability. Chromium oxide green pigments are characterized by excellent application properties. They are synthesized starting from alkali dichromates or ammonium dichromate by reduction in liquid or solid phase.


2015 ◽  
Vol 655 ◽  
pp. 216-219
Author(s):  
Yun Xia Chen ◽  
Jing Chen ◽  
Xiao Li Su ◽  
Ting Nie ◽  
Jin Wang

Green pigments have been synthesized. Sodium silicate, chromium oxide, lithium carbonate and quartz were used as the main raw materials to prepare (Na0.4Li0.6)CrSi2O6 emerald green pigments by solid state reaction under the non-reductive conditions. The effects of the various technological conditions, such as raw materials ratios of (Na0.4Li0.6)/Cr/Si, calcination temperature, holding time and the type of mineralizers, on the color presentation of the synthesized pigments were studied. XRD and SEM were employed to analyze the crystalline and structure of the synthesized pigments. Chroma value was used to characterize the color of the pigments. The results show that the optimized (Na0.4Li0.6)CrSi2O6 pigments with chroma value of L*=57.78, a*=-18.98~-18.68 and b* = 10.88~9.01 were obtained.


1966 ◽  
Vol 6 (11-12) ◽  
pp. 549-550 ◽  
Author(s):  
V HOWES
Keyword(s):  

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