文章信息/Info

Title:

Research Progress in Magneto Dielectric Materials with Spinel Structure

作者:

王棋; 張懷武; 金立川; 唐曉莉; 鐘智勇

(電子科技大學 電子薄膜與器件國家重點實驗室，四川 成都 610054)

Author(s):

WANG Qi;  ZHANG Huaiwu;  JIN Lichuan;  TANG Xiaoli;  ZHONG Zhiyong

(State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054)

關鍵詞:

磁介電材料;  磁導率;  介電常數

DOI:

10.7502/j.issn.1674-3962.2012.07.05

文獻標志碼:

A

摘要:

隨著通信技術的發展，對無限通信設備的集成度有了更高的要求，天線小型化成為目前重要的研究方向。等磁介電材料是一種既具有磁導率又具有介電常數，且磁導率和介電常數幾乎相等的材料，使用等磁介電材料作為天線的基板，能有效的減小天線的尺寸，提高帶寬，增加輻射效率。鐵氧體是由Fe2O3和一種或多種金屬氧化物復合而成，具有較高的磁導率和介電常數，由于其同時具有磁特性和介電特性，是一種潛在的等磁介電材料。綜述了近幾年尖晶石結構磁介電材料的國內外研究進展，著重討論了摻雜改性對燒結溫度、磁導率、介電常數、直流電阻等電磁特性的影響。最后指出目前研究中存在的問題，并展望了該材料在未來發展的方向。��

Abstract:

With developing of the communication technology, wireless communication systems have created an increased demand for being compact, antenna miniaturization attract much interest these years. Magneto dielectric materials have almost equal values of real permeability and permittivity. Magneto�瞕ielectric as a substrate for antennas is to miniaturize the size and enhance the bandwidth as well as radiation efficiency. Ferrite is a potential magneto�瞕ielectric which posses both magnetic and dielectric property simultaneously. Ferrites are materials in which Fe2O3 combined with one or more other metal oxides, and have high magnetic permeability and high electrical resistivity, so they can be applied in the high frequency. In this letter, the developing process of magneto dielectric materials is reviewed, the effect of dopants on sintering temperature, permeability, permittivity, DC resistivity are discussed. At last we point out the magneto dielectric material is a promising material for antenna miniaturization, and the development direction of magneto dielectric materials.