Synthesis of FexZn1-xCr2O4 brown ceramic pigment by starch-assisted sol-gel process

Hue University Journal of Science: Natural Science - Tập 128 Số 1B - Trang 13-19 - 2019
Tran Ngo Tuyen1, Nguyen Duc Vu Quyen2, Tran Bao Lam3
1Chemistry Department, University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
2Chemistry Department, Hue University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
3Nghia Ha Junior High School, Quang Ngai city, Vietnam

Tóm tắt

In the present paper, the ceramic pigments FexZn1-xCr2O4 (x = 0 ¸ 1) were synthesized with the starch-assisted sol-gel method. The resulting pigments were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and CIE L*a*b* color measurement. The results show that FexZn1-xCr2O4 pigments form at sintering temperature of 1100 OC for 60 minutes. The ACr2O4 spinel (A: Zn, Fe) and FeCrO3 perovskite phase with excellent crystallinity appears. The brown color intensity increases gradually with the increase of the number of substituted Fe2+ cations. The pigments meet industrial requirements in terms of physicochemical characteristics.

Từ khóa

#Brown pigments #spinel #sol-gel method

Tài liệu tham khảo

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