溶胶-凝胶法制备的高性能纳米NiCuZn铁氧体材料

High-performance Nanostructured NiCuZn Ferrite Materials Synthesized by Sol-Gel Method

采用溶胶-凝胶法制备了高性能的NiCuZn铁氧体纳米粉末。研究表明,反应体系的最佳pH值为3.8-4.4,最佳反应温度是70-80℃,并且在正硅酸乙酯催化下,形成凝胶的时间大为缩短。添加10%BaTiO3所得复合材料具有可调控的电磁性能,其起始磁导率为10-25,介电常数为40-100,截止频率高于1.0GHz,该材料可用于高频多层片式电感。

High-performance NiCuZn nanostructured ferrite materials were synthesized by sol-gel method. The result shows that the optimal pH value of the reactive system was 3.8-4.4, the optimal reactive temperature was 70-80 ℃, and the gelation time was shortened greatly by adding tetraethyl orthosilication. The composites with 10%ABaTiO3 have tunable electric and magnetic properties with μ=10-25, ε=40-100, and resonant frequency of higher than 1.0GHz, which can be used to prepare high-frequency multi-layer chip inductors （MLCI）.