氢致绝缘铁氧体材料电学改性研究 - PolyU IRA.PDF

34　 3 稀　有　金　属 20 10 5 Vo.l34　No.3 CHINESEJOURNALOFRAREMETALS May20 10 1 1 ＊ 2 1 3 4 王兰花, 曹江利 , 张　力 , 乔利杰, 古宏伟, 王　雨 (1.北京科技大学新材料技术研究院, 北京 100083;2. 方股份有限公司, 清华- 方功能陶瓷联合实验 室, 北京 1000 83;3.中国科学院电工研究所, 北京 100190;4.香港理工大学应用物理系, 香港) : NiZnCu, (30 ～ -2 120 A·m ) (20 ～60 ℃)。, , NiZnCu, , , ;, , 。 -2 。 120 A·m , 40 ℃, , 2 min 8.29 ×108 Ψ·m 1.32 Ψ·m, 9 , 。 NiZnCu , --。, NiZnCu 。 :;;;; do:i10.3969/.issn.025 8-7076.2010.03.0 10 :O469　　:A　　:0258-707 6(2010 )03-0368-05 Hydrogen-InducedModificationsofElectricalPropertiesofInsulatingFerrites 1 1 ＊ 2 1 3 4 WangLanhua, CaoJiangli, ZhangLi, QiaoLiie, GuHongwei, WangYu (1.InstituteofAdvancedMaterialsandTechnology, UniversityofScienceandTechnologyBeiing, Beiing100083, China;2.Tsinghua-TongfangFunctionalCeramicsJointLaboratory, TongfangCo., Ltd, Beiing1000 83, China; 3.InstituteofElectricalEngineering, ChineseAcademyofScience,sBeiing100190, China;4.DepartmentofAp- pliedPhysic,sHongKongPolytechnicUniversit,yChina) Abstrac:tElectrochemicalatomichydrogen-inducedmodificationsofelectricalpropertiesofinsulatingNiZnCuferriteceramicsand -2 theeffectsofelectrochemicalcathodiccurrentdensity(30 ～ 120 A·m )andtemperature(20 ～60 ℃)ofatomichydrogentreamtent wereinvestigated.ItwasshownthattheresistivityofNiZnCuferriteceramicsdecreasedrapidlyattheinitialstageoftheatomichydro- genchargingandtheferriteceramicsbecamesemiconductive.Thenwithincreasinghydrogenchargingtmi,e theresistivitydecreased lessrapidlyandtendedtoremainstable.Thepermittivityincreasedwithincreasinghydrogenchargingtmieandthenstartedtodecrease afterreachingamaxmiumvalue.Therewasn