Melis BULUT, M.Sc. Student

Metallurgical and Materials Engineering

Yıldız Technical University

 

Effect of Low Calcination Temperature on Stability of Iron Manganese Oxide Pigments

Supervisor: Assoc Prof. Dr. Buğra Çiçek

Black inorganic pigments are widely produced by using synthetic methods such as thermal decomposition of iron salts, precipitation, solid state reaction, and reduction of organic compounds [1,2]. In our study, a black pigment with the structure of MeFe2O4 (where Me is manganese) was obtained by calcining its raw materials, manganese dioxide (MnO2) and γ-Fe2O3. The temperature-resistant black pigment, which is a mixed oxide of manganese and iron with a spinel structure, has excellent color properties, tinting strength, and lightfastness [3]. The black pigment produced in this way is particularly advantageous in that it does not contain heavy metals or highly toxic materials [4]. These fine powdered black pigments are used to color many materials including glass, plastic, glazes and ceramic bodies. [2,4].

 

[1] Mariani, Filipe Quadros, et al. "Sustainable innovative method to synthesize different shades of iron oxide pigments." Dyes and Pigments 137 (2017): 403-409.

[2] Buxbaum, Gunter, ed. Industrial inorganic pigments. John Wiley & Sons, 2008.

[3] Kuske, Peter, and Gunter Buxbaum. "Black manganese/iron oxide pigment a process for its production and its use." U.S. Patent No. 5,164,005. 17 Nov. 1992.

[4] Tanisan, Belgin, and Servet Turan. "Synthesis of Fe-Mn black pigments by using hematite waste and manganese ore mixtures." Transactions of the Indian Ceramic Society 71.1 (2012): 17-20.