Preparation and microwave hexaferrites by a sol-gel process

作     者：ZHANGHaijun JIAXiaolin YAOXi ZHANGLiangying 

作者机构：HighTemperatureCeramicsInstituteZhengzhouUniversityHenan450052.China FunctionalMaterialsResearchLaboratoryTongjiUniversityShanghai200092China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2004年第23卷第1期

页      面：27-31页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China (No. 59995320.4) 

主　　题：inorganic nonmetal material sol-gel Ba_4Zn_zCo_(2-z)Fe_(36)O_(60) hexaferrite microwave property 

摘      要：s Ba_4Zn_zCo_(2-z)Fe_(36)O_(60) hexaferrites with Z = 2.0, 1.5, 1.0, 0.5, and0.0 were prepared by a citrate Sol-gel process. The complex dielectric constant and complexpermeability of hexaferrite-paraffin wax composites were measured in the range from 0.1 to 6.0 *** results showed that both the complex dielectric constant and the dielectric loss exhibitedno significant change as the measuring frequency increasing except for the sample with Z = 0.0. Thereal part of permeability decreased with increasing frequency for all samples in the whole measuringfrequency range, and the natural resonance phenomena were observed in all μ″ spectrum but Co_*** results also indicate that the content of zinc closely affects the microwave properties ofBa_4Zn_zCo_(2-z)Fe_(36)O_(60) ferrites, and the greater the zinc content, the lower the naturalresonance frequency is.