W/O微乳液法制备纳米铝钎剂

Study on the Preparation of Nano-Aluminum Flux Material in Microemulsion

研究了使用微乳液法制备铝及铝合金共晶钎剂的纳米团簇微粒 .该方法操作方便 ,可人为控制粒径 ,而且体系热力学、动力学的特性稳定 .采用微乳液法制备纳米级的铝及铝合金共晶钎剂具有一定的可行性和实用性 .应用W /O微乳液法研究制备了在不同结晶条件下的KF AlF3 共晶产物 .应用差热分析法 (DTA)测定了不同结晶条件下一系列产物的熔点及特性 ,应用X 射线衍射仪 (XRD)确定了在各种条件下的产物组成 .实验结果表明 ,在反应过程中 ,温度控制在特定条件下有利于得到主结构为KAlF4 K3 AlF6的铝钎剂共晶材料 .应用微乳液法制备出的KAlF4 K3 AlF6共晶纳米微粒 ,X 衍射图谱证明其主相为KAlF4,次相为K3 AlF6.差热分析证明纳米晶的熔点为 5 60℃ .

In this article it is studied to prepare nanoparticle of aluminum fluxes for brazing aluminum and its alloy. The operation is convenient and the diameter of the nanoparticle can be controlled. The thermodynamics performance and dynamics performance of the system are both steady. The method is feasible and applied. It is studied to prepare a series of KF-AlF 3 eutectic products at various eutectic conditions. The melting points of the products are measured by differential thermal analysis (DTA) and the composites of each product are conformed by X-ray diffraction. It is suggested that it is good to get the ideal fluxes consisted of KAlF 4-K 3AlF 6 at a certain temperature. The KAlF 4-K 3AlF 6 eutectic nanoparticle is prepared by microemulsion method. It is suggested by X-ray diffraction patterns that material of the main phase is KAlF 4 and the material of the minor phase is K 3AlF 6. The melting point of nano-eutectic is 560 ℃ proved by differential thermal analysis. The material is considered as the perfect aluminum fluxes for brazing aluminum and its alloy.