Modification mechanism of the aluminum–zirconium coupling agent in anti‐erosion coating for cement kilns
Year: 2025
Type: article
Abstract: In order to improve the properties of refractories for cement kilns, reduce the energy loss in the calcination process of cement kiln. In this work, the anti‐erosion coatings were prepared by the slurry method using alumina as the filler of coating and aluminum–zirconium coupling agent (DH‐550) as additive. The steric effects mechanism of DH‐550 was investigated through Fourier transform infrared spectrometer (FTIR), high‐temperature abrasion resistance tests, and microstructure analysis after erosion. The results show that the substrate without coatings exhibits poor erosion and abrasion resistance. Upon the addition of DH‐550, the hydrolysis of Al 2 O 3 generates an increased density of surface hydroxyl groups, which facilitate the chemisorption of DH‐550 onto the Al 2 O 3 surface, forming a protective organic–inorganic hybrid layer. The grafted DH‐550 molecules introduce steric hindrance effects, thereby effectively increasing interparticle distances and mitigating agglomeration. Consequently, Al 2 O 3 is uniformly distributed on the substrate surface after drying, enabling the formation of 3Al 2 O 3 ·2SiO 2 and Al 2 TiO 5 phases at the interface during the high‐temperature heat treatment. The pores are filled by Al 2 TiO 5 formation, and a dense protective layer is subsequently formed, leading to significantly improved erosion resistance. The overall performance of the sample is optimal when the DH‐550 addition amount is 2 wt%.
DOI: 10.1111/ijac.70049
Authors: Bo Song, Chao Tian, Rui Li, Lin Tian, Changhe Gao, Shulong Ma, ShiTong Luo, MingJun Duan
Institution: University of Science and Technology Liaoning
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4415069693