Abstract: In this work, the phosphate liquid was prepared by phosphoric acid and aluminum hydroxide. Modified aluminum dihydrogen phosphate base liquid was prepared by adding chromium oxide as modifier. Three modified phosphate adhesives were prepared by modified aluminum dihydrogen phosphate base liquid with three curing agents:chromium oxide, alumina and magnesium oxide. The effects of chromium oxide modifier dosage and different curing agents on the composition, viscosity and film-forming properties of modified aluminum dihydrogen phosphate base liquid and modified phosphate adhesive were studied. Besides, the changes in bonding strength and curing time of different types of modified phosphate adhesives when applied to ceramic materials were further studied. The results showed that the optimal amount of chromium oxide modifier in modified aluminum dihydrogen phosphate base liquid is 8%. By separately adding 7.5% chromium oxide, alumina and magnesium oxide could obtain a modified phosphate adhesive with optimal bonding strength. The maximum bonding strength is 1.22 MPa, 1.11 MPa and 0.73 MPa, respectively. As well as the curing times were 8 h, 8 h and 6 h. With the combined action of modifier and curing agents, it could be cured at the room temperature by step-by-step curing. It optimizes the curing process, improves the bonding strength of the adhesive, and shor-tens the curing time.
默玉海, 庞凌燕, 刘千龙, 刘辉. 改性磷酸盐胶黏剂的制备及性能表征[J]. 材料导报, 2023, 37(14): 23020041-6.
MO Yuhai, PANG Lingyan, LIU Qianlong, LIU Hui. Preparation and Performance Characterization of Modified Phosphate Adhesives. Materials Reports, 2023, 37(14): 23020041-6.
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2023, Vol. 37 
