电磁波在军事探测领域的广泛应用和由其产生的电磁干扰、电磁污染等问题使吸

电磁波在军事探测领域的广泛应用和由其产生的电磁干扰、电磁污染等问题使吸波材料成为各国研究的重点内容。探索出高强度、宽<br>频吸收的电磁波吸收材料，在军事和民用领域都具有重要意义。W型钡铁氧体具有较大的磁晶各向异性场、高的饱和磁化强度、大的<br>矫顽力、高的电阻率和优秀的化学稳定性，是高频微波应用领域最有潜力的一类材料。频率为26.5-40GHz范围的电磁波因同时具有厘<br>米波的全天候特点和毫米波的高成像分辨率特点，已被广泛应用于军事雷达探测。在高频波段，铁氧体主要通过自然共振来强烈的吸<br>收衰减电磁波。钡铁氧体具有高于40GHz的自然共振频率，可通过等价离子加入实现其共振频率降低，有望在26.5-40GHz频率范围得<br>到高效的吸收效能。用其它高价阳离子对铁氧体中Fe3+进行取代时，使Fe3+转化为Fe2+维持电荷平衡。相邻与之间存在超交换耦合作<br>用，其耦合磁矩进动频率高于磁矩的进动频率，形成了双共振机构，进而产生双损耗吸收峰。利用双吸收峰的叠加作用，可以达到宽<br>频吸收电磁波的目的。本文通过共沉淀法制备了钡钴锌铁氧体吸波涂层材料。研究热处理温度对铁氧体的晶相形成和电磁性能的影响

电磁波在军事探测领域的广泛应用和由其产生的电磁干扰、电磁污染等问题使吸波材料成为各国研究的重点内容。 探索出高强度、宽<br>频吸收的电磁波吸收材料，在军事和民用领域都具有重要意义。 W型钡铁氧体具有较大的磁晶各向异性场、高的饱和磁化强度、大的<br>矫顽力、高的电阻率和优秀的化学稳定性，是高频微波应用领域最有潜力的一类材料。 频率为26.5-40GHz范围的电磁波因同时具有厘<br>米波的全天候特点和毫米波的高成像分辨率特点，已被广泛应用于军事雷达探测。 在高频波段，铁氧体主要通过自然共振来强烈的吸<br>收衰减电磁波。 钡铁氧体具有高于40GHz的自然共振频率，可通过等价离子加入实现其共振频率降低，有望在26.5-40GHz频率范围得<br>到高效的吸收效能。 用其它高价阳离子对铁氧体中Fe3+进行取代时，使Fe3+转化为Fe2+维持电荷平衡。 相邻与之间存在超交换耦合作<br>用，其耦合磁矩进动频率高于磁矩的进动频率，形成了双共振机构，进而产生双损耗吸收峰。 利用双吸收峰的叠加作用，可以达到宽<br>频吸收电磁波的目的。 本文通过共沉淀法制备了钡钴锌铁氧体吸波涂层材料。 研究热处理温度对铁氧体的晶相形成和电磁性能的影响

The extensive application of electromagnetic wave in the field of military detection and the problems of electromagnetic interference and electromagnetic pollution caused by it make the absorbing materials become the focus of research in various countries. Explore high strength and wide<br>Electromagnetic wave absorbing materials with frequency absorption are of great significance in military and civil fields. W-type barium ferrite has large magnetocrystalline anisotropy field, high saturation magnetization and large<br>Coercive force, high resistivity and excellent chemical stability are the most potential materials in the field of high frequency microwave applications. The electromagnetic wave factors in the frequency range of 26.5-40 GHz have both cm and cm<br>The all-weather characteristics of meter wave and the high imaging resolution characteristics of millimeter wave have been widely used in military radar detection. In the high frequency band, ferrite absorbs strongly mainly through natural resonance<br>Attenuate the electromagnetic wave. Barium ferrite has a natural resonance frequency higher than 40 GHz, and its resonance frequency can be reduced by the addition of equivalent ions, which is expected to be in the frequency range of 26.5-40 GHz<br>To efficient absorption efficiency. When Fe3 + in ferrite is replaced by other high valence cations, Fe3 + is converted into Fe2 + to maintain charge balance. There is super exchange coupling cooperation between adjacent and<br>Using, the precession frequency of the coupling magnetic moment is higher than the precession frequency of the magnetic moment, forming a double resonance mechanism, and then producing a double loss absorption peak. By using the superposition of double absorption peaks, the width can be<br>The purpose of absorbing electromagnetic wave by frequency. In this paper, barium cobalt zinc ferrite absorbing coating materials were prepared by coprecipitation method. The effect of heat treatment temperature on the formation of ferrite phase and electromagnetic properties was studied<br>