Effect of Co and Pr doping on the properties of solar-reflective ZnFe2O4 dark pigment

17th IUMRS International Conference in Asia

Suwan, M.^1 ; Sangwong, N.^1 ; Supothina, S.^1

National Metal and Materials Technology Center, National Science and Technology Development Agency (NSTDA), 114 Thailand Science Park, Phahonyothin Rd., Klong Luang, Pathum Thani

12120, Thailand^1

关键词: Black pigment;    Co-doped;    Effect of CO;    Pr doping;    Reflectance spectrum;    XRD analysis;    ZnFe2O4;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/182/1/012003/pdf
DOI  :  10.1088/1757-899X/182/1/012003

来源: IOP

【 摘 要 】

High NIR-reflective Co-doped ZnFe2O4black pigments were synthesized by a simple solid-state reaction of ZnO and Fe2O3in the presence of 3 to 30 wt.% Co3O4at 1000 and 1100 °C. A series of black pigments with low L∗ values in a range of 25.5-26.5 and NIR reflectance of 39.5-48.7% were obtained at 1000 °C while the pigments with comparable L∗ values and slightly lower NIR reflectance were obtained at 1100 °C. A change of the pigment property could be attributed to substitution of Co2+for Zn2+as revealed by XRD analysis as well as reflectance spectra. Calcination of ZnO and Fe2O3in the presence of 3 to 30 wt.% Pr6O11at 1100 °C resulted in dark brown composite pigments consisting of ZnFe2O4, PrFe2O3and unreacted Fe2O3with L∗ value around 40 ±1 and NIR reflectance in a range of 48-50%.