Honors College Thesis
 

New Inorganic Pigments from Mineral Structures

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https://ir.library.oregonstate.edu/concern/honors_college_theses/pn89df99g

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  • The discovery of new blue pigments is a field of great interest, as commercially available pigments present properties that make them undesirable such as poor sustainability, cost, and stability. By researching solid solutions with the melilite structure, we discovered a new solid solution Sr2Zn1-xNixGe2O7, with 0.1 ≤ x ≤ 0.6, presenting violet coloration that changed systematically through the addition of nickel. The best color was found in Sr2Zn0.4Ni0.6Ge2O7. The presence of Ni2+ was confirmed in the material by using magnetic susceptibility measurements (x = 0.5 and 0.6), with the system showing an effective magnetic moment of 4.2 μB¬. Measured NIR reflectance was between 30% and 80%, presenting overall better reflectance than cobalt-containing pigments. Therefore Sr2Zn1-xNixGe2O7 could be applied as a “cool” pigment. Our Ni-based melilite also has the advantages of better costs and safety than co-based pigments due to the high abundance of nickel. Dielectric measurements performed on the system characterize it as an insulator with nearly temperature and frequency independent dielectric constant and loss tangent.
  • Keywords: pigments, inorganic chemistry, chemistry, materials.
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  • Pending Publication
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  • 2022-05-22 to 2023-06-22

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