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测定了２－膦酸丁烷－１；２，４－三羧酸（ＰＢＴＣＡ）的电离特性，并通过Ｚｅｔａ电位、粒径分布、沉降、比表面积等手段研究其在Ａｌ２Ｏ３表面的吸附及其对电动特性和稳定性的影响．结果表明；ＰＢＴＣＡ在Ａｌ２Ｏ３表面发生化学吸附，并能显著提高颗粒表面的带电量，从而改善浆料的稳定性．ＦＴＩＲ研究表明；羧基及磷酸基均参与了ＰＢＴＣＡ在Ａｌ２Ｏ３表面的化学吸附，从而提高了吸附强度．通过对沉积物表面ＳＥＭ照片的灰度分析发现，其表面形貌具有分形特征，且悬浮液的稳定性越好，沉积物表面的分维值Ｄｆ越大．
The ionization characteristics of 2-phosphonic acid butane-1, 2,4-tricarboxylic acid (PBTCA) were determined and their adsorption on the surface of Al2O3 by Zeta potential, particle size distribution, sedimentation and specific surface area Electrical characteristics and stability of the impact. The results showed that PBTCA chemisorbed on the Al2O3 surface, and could significantly increase the charge on the surface of the particles to improve the stability of the slurry. FTIR study showed that both carboxyl groups and phosphate groups were involved in the chemisorption of PBTCA on the surface of Al2O3, which enhanced the adsorption strength. The grayscale analysis of the SEM photos of the sediment surface shows that the surface morphology has the fractal characteristics, and the better the stability of the suspension, the larger the fractal dimension Df of the sediment surface.