【doc】 CaCu_3Ti_4O_(12)基高介电常数材料
CaCu_3Ti_4O_(12)基高介电常数材料
5225
?????????U?f?(???p????????(36)
?????;??:049026756(2005)0z220269203
CaCu3Ti4O12???????g?b??????
?F????,?J???U,?Ad??0
(?U?f?c???g?????????2?????g???????a???E??,?U?f300072)
????:?????g???????u???;???W?g???h?9?????????g?b??.CaCu3Ti4O12?E????????????????
??????,?????????g?b???h10
4
????.???)?,?????????????p?0CaCu3Ti4O12?????????2,?)??
?t?????????8?????V,?p?0????CaCu3Ti4O12??????????.?,?????[???????h???????????t??
???W???????????g?c????????,???e?E???????g???N??????.
???y??:?????g????;????????;???g?b??
?t???:????:TN6d?d?d????y?0???5:A
1d??.??
?h?g?????[???E?????t,?u???;?E?5???C???????W.?????g???????u???;???W?g???h?9?????????g?b
??.BaTiO3???????E?J????????????????.BaTiO3?????g2,?[??????d5????
??????,?????????[???U?????c?????h????
[1]
.CaCu3Ti4O12?E??????????????????????(?????g??????
??),?????????g?b???h10
4
????
[2,3]
.???pCaCu3Ti4O12???E??????????????????,?K???????g2,
????,?????g?b???U?????;???h???U???3???????5???R.?????????.?????c????,??CaCu3Ti4O12?T?m????
?g???h???:?a??????????????????.?i???,?????????????p?0CaCu3Ti4O12?????????2,?)???t????????
?8?????V,?p?0????CaCu3Ti4O12??????????.?,?????[???????h???????????t?????W???????????g?c??
??????,???e?E???????g???N??????.
2d????????:
???h?:???????c?;??d5?c?;??d5???????m????,?h?????????4?T????.?[???????U???????U????????
?4,?,???4?TCaCu3Ti4O12?????????2.???J???????????p?0?????????w.?????a?h1kHz?2???????g?c
??.?hX?????6????????????.
3d??????a????
3.1d?CaCu3Ti4O12???4?T
???y?t??????CaCu3Ti4O12???4?T???????(???c,?U????850o3??1000o3,???U?????????u???????L
?u??
[2??4]
.?i???h600o3??1200o3????????????????,?h???eX?????6???c?:?????8??????.?h800o3??
???c???8?TCaCu3Ti4O12,?z???8?TCaTiO3(??1).CaTiO3?????/?????h?d1200o3(??2).???9?[???[?o
????,?????4?T??????CaCu3Ti4O12
3.2d?CaCu3Ti4O12???h???c??
?h?4?T???????????p?0?????h????.???T?U??1060o3??1120o3.???????g?b???h5000????.1080o3
???T?????w?????N?????0?R???u,?m0.10.
3.3d?CaCu3Ti4O12?????W?M?c
2005??10?4
?s42?????72
?????c??????(???p??????)
JournalofSichuanUniversity(NaturalScienceEdition)
Oct.2005
Vol.42d?Issue2
:200091
:0201911
CaCu3Ti4O12?????W?M?c,???????????????g?b??,???e?E,???????N.?i?????????[??????
?h?C?z???R??????????????.??4?E??????????????.?????M?c,???????g?b???????d29??10
3
,???N?B??
????0.05.
??1d?850o3/6h?????2?4?T??????X?????6??
d?d?Fig.1d?X2raydiffractionpatternforpowder
treatedat850o3for6h
??2d?1200o3/24h?????2?4?T??????X?????6??
d?d?Fig.2d?X2raydiffractionpatternforpowdertreatedat
1200o3for24h
??3d?1060o3(a)??1080o3(b)???T???w???g???G????????
Fig.3d?SEMmicrographsofceramicssinteredat1060o3(a)and1080o3(b)
??d????g?c???????W?????????;
d?d?()???????g?b??;()???N
Fd?Df
d?d?();()
072?????c??????(???p??????)?s42??
4
ab
ig.4ependenceodielectricpropertiesondopantconcentration
arelativedielectricconstantbdielectricloss
4d?????
?h?4?TCaCu3Ti4O12???????????t,CaTiO3?E?????t??????.?????[???[?o?????4?T??????????.??
???W?M?c,?????p?0?????????g?b???m29??10
3
,???N?m0.05?????h????.
???3???y:
[1]d??????y.?g??????????[M].?U?f:?U?f?c???????G,1993.
[2]d?RamirezAP,SubramanianMA,GardelM.Giantdielectricconstantresponseinacopper2titanate[J].SolidStateComm,
2000,115:217-225.
[3]d?HomesCG,VogtT,ShapiroSM.OpticalResponseofHigh2Dielectric2ConstantPerovskskite2RelatedOxide[J].Science,
2001,293:673-676.
[4]d?SubramanianMA,LiD,DuranN.HighDielectricConstantinACu3Ti4O12andACu3Ti3FeO12Phases[J].J.Sol.State
Chem,2000,151:323-325.
HighDielectricConstantCeramicsBasedonCaCu3Ti4O12
WUYu2gong,ZHANGHui2li,LIUZhen
(SchoolofElectronicandInformationEngineering,TianjinUniversity,Tianjin300072,China)
Abstract:Materialswithhigherdielectricconstantisdesiredtofurtherminiaturizecapacitors.CaCu3Ti4O12.
ItwasrecentlyfoundthatCaCu3Ti4O12hadadielectricconstantin10
4
order.Inthiswork,theauthorsinves2
tigatedsynthesesofCaCu3Ti4O12viasolidstatereaction.Formationanddepleteofinterimphasewasdetected
todeterminesuitableconditiontoobtainCaCu3Ti4O12singlephase.Dopingeffectsofvariousionsisalsostud2
iedwithastressonmethodtolowerdielectricloss.
Keywords:giantdielectricrespondmaterial;CaCu3Ti4O12;dielectricconstant
172???72?F??????:CaCu3Ti4O12???????g?b??????
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