Preparation of Copper Aluminate Pigment by Combustion Method

Abstract

Abstract: In this paper, copper nitrate trihydrate, aluminum nitrate nonahydrate and glycine were used as raw materials to prepare CuAl₂O₄ brown pigment by combustion method. The effects of calcination system and Cu/Al molar ratio on phase composition, microstructure, and color performance of the pigment were investigated by means of XRD, FT-IR, TG-DTA and UV-Vis. The results show that when the the calcination temperature is 1 100 ℃ (without heat preservation) and the Cu/Al molar ratio is 1∶2.4, the CuAl₂O₄ pigment with the best color performance is obtained and its chromatic value is L^*=46.22, a^*=24.43, b^*=27.09.

Key words: CuAl₂O₄, brown pigment, combustion method, calcination system, color performance, microstructure

CLC Number:

TQ174.4

CHENG Zhipeng, LIU Kun, XU Yinan, FANG Yuan, JIANG Caishui, LI Hao, YU Huan, BAO Qifu, ZHOU Jian’er. Preparation of Copper Aluminate Pigment by Combustion Method[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3490-3496.

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