NiZn铁氧体材料及其离子掺杂改性研究

发布时间：2018-02-03 18:01

本文关键词： NiZn系列铁氧体离子掺杂改性磁-电材料 LTCC工艺技术　出处：《电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：在信息技术快速发展的今天,信息领域的电子元器件的需求与发展得到了前所未有的关注和提高。如何满足工业和生活中的高标准和高性能需求,成为电子器件行业领域亟待解决的问题之一,电子器件性能的提高来源于两个方面,一是电子电路优化设计,二是提高电子信息基础材料的性能。所以,在电子信息材料领域方面的研究,在电路优化设计的基础上,材料性能的提升研究是解决电子器件发展问题的关键问题之一。NiZn铁氧体材料,晶体结构类型为尖晶石结构(AB2O4),在电子器件领域应用中,是电感和滤波器等电路器件的重要基础材料之一。它是一种多元复合金属氧化物高温烧结合成的化合物,在磁电子学领域一直占据着重要的位置。在NiZn铁氧体材料的应用中,从功率铁氧体功能到片式电感应用方面,NiZn铁氧体及其衍生材料发挥着巨大的作用。NiZn铁氧体材料是基础材料,基础材料的性能和结构决定着后期的掺杂改性研究,所以,制备NiZn铁氧体(Ni0.5Zn0.5Fe2O4)材料。采用不同的烧结曲线烧结材料,研究材料的晶相、微观结构、磁性以及Q值等参数的变化。材料性能表征显示,当烧结温度为1050°C时,恒温保持4 h,饱和磁化强度Ms达到极大值(57.4emu/g),同时材料的矫顽力出现最低值15.4 Oe。随着烧结温度从950°C到1100°C,磁导率实部μ′的值也逐渐升高,同时,材料的品质因数Q值逐渐降低。结合材料内部晶体结构,第二步制备了La3+三价离子和Ga3+三价离子取代三价Fe3+离子的改性研究,不同的离子取代显示出不同的性能和微结构变化,结合离子占位理论详细讨论。在此基础上,研究NiCuZn铁氧体材料和介电材料BaTiO3的复合材料性能,通过不同配比,研究NiCuZn/BaTiO3复相陶瓷的磁性和介电双性能的变化,初步制备磁-电双性的复相陶瓷材料。最后,我们研究了复合材料的低温共烧技术(LTCC)的问题,对NiCuZn-BaTiO3材料进行低温烧结,并在一定程度上改善了材料的烧结工艺和体系的性能。
[Abstract]:With the rapid development of information technology, the demand and development of electronic components in the field of information have received unprecedented attention and improvement. How to meet the needs of high standards and high performance in industry and life. The improvement of the performance of electronic devices comes from two aspects, one is the optimal design of electronic circuits, the other is to improve the performance of electronic information basic materials. In the field of electronic information materials, on the basis of circuit optimization design, the improvement of material properties is one of the key problems to solve the development of electronic devices. NiZn ferrite materials. The crystal structure type is spinel structure AB _ 2O _ 4, which is applied in the field of electronic devices. It is one of the important basic materials of inductor and filter. It is a kind of compound compound metal oxide synthesized by high temperature sintering. It has been playing an important role in the field of magnetoelectronics. In the application of NiZn ferrite materials, from the power ferrite function to the application of chip inductor. NiZn ferrite and its derived materials play a great role. NiZn ferrite materials are basic materials. The properties and structure of basic materials determine the later doping modification research. The NiZn ferrite Ni0.5Zn0.5Fe2O4) material was prepared and sintered with different sintering curves to study the crystalline phase and microstructure of the material. The change of magnetic properties and Q value showed that when sintering temperature was 1050 掳C, the saturation magnetization (Ms) reached a maximum value of 57.4 emu / g at constant temperature of 4 h. At the same time, the coercivity of the material appears to be the lowest 15.4 Oe. With the sintering temperature from 950 掳C to 1100 掳C, the value of the permeability 渭 'increases gradually, and at the same time. The quality factor Q value of the material decreased gradually. In the second step, La3 trivalent ions and Ga3 trivalent ions were prepared to replace trivalent Fe3 ions. Different ion substitutions show different properties and microstructures, which are discussed in detail in combination with ion occupation theory. The properties of NiCuZn ferrite and dielectric BaTiO3 composites were studied. The changes of magnetic and dielectric properties of NiCuZn/BaTiO3 multiphase ceramics were studied. We studied the problem of low temperature co-firing (LTCC) of composite materials and sintered NiCuZn-BaTiO3 materials at low temperature. The sintering process and the properties of the system were improved to some extent.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM277

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