摘要
采用回流制备方法,通过对比实验和化学定量分析,研究了Fe2+的催化作用以及对Mn、Zn元素实施补偿的可行性,得出试样中金属元素的摩尔比。实验发现:pH≤9.6时,Fe2+对合成反应具有明显的催化作用。初始pH>7时,Zn元素能进行补偿;初始pH>8.5时,Mn元素才能进行补偿。XRD和TEM研究表明,Mn-Zn铁氧体纳米粒子为球形,平均粒径约为4.35nm。
The catalysis of Fe^2＋ and possibilities of compensating Mn （Zn） in boiling circumfluence were studied. By contrastive experiment and quantitative analysis in chemical method, the molar ratio of metallic element in the sample was obtained. The results show that the synthetic reaction of Mn-Zn ferrite nanoparticles is accelerated with Fe^2＋ only when pH is lower than 9.6. Zn can be compensated when the initial pH is more than 7.0, but Mn can be compensated only when the initial pH is higher than or equal to 8.5. Compromising effectiveness of the activator and compensation of metallic element, the initial pH of the reaction system must be controlled from 8.5 to 9.6 in boiling circumfluence. The techniques such as XRD, TEM and SEM were used to determine the crystal structure and morphology of ferrite nanoparticles. The results show that the average diameter of the powders with spherical shape is 4.35 nm.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2006年第9期12-15,共4页
Electronic Components And Materials
基金
国家自然科学基金资助项目(NSFC20471008)
关键词
无机非金属材料
回流法
纳米粒子
MN-ZN铁氧体
补偿实验
inorganic non-metallic materials
boiling circumfluence
nano-sized particle
Mn-Zn ferrite
compensating experiment
