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 Wysłany: Nie 19:16, 28 Lis 2010 Temat postu: wholesale PUMA Ln rare earth elements on the diele |
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Ln rare earth elements on the SrTiO3 dielectric properties
ature. Fourkindsingle-layerelectroluminescencedeviceweredesigned, andthelumines-cencepropertieswerealsostudiedundertheliquidnitrogentemperature (77K). Foundthatfourkindmaterialswereallemittedbluelight. Keywords: conductingpolymer; electrochemicaldoping; photoluminescence; electroluminescence = (on the next page 79) (4) Rare Earth Elements on SrTiO ceramics, there are two effects, one can serve as a subject. , The main impurities and donor impurities in balance; Second, the excess part of the rare earth elements and replacement of the Sr ions in the grain boundary precipitates, the grain boundary re-oxidation. Increased SrTiOa ceramics (1) adding rare earth elements (La, Nd, Y, or Ce) of the SrTiO ceramics, the insulation level in the thin, to keep a low dielectric loss. Earth element content = 5 ~ 3O range, the relative dielectric constant e has obvious references: increasing the dielectric loss tg8 increased slightly. [1] JoknsonDW, eta1. [J]. JApplePhys,wholesale PUMA, 1976, (41): 2828. (2) rare earth element of the SrTi () a ceramic Cr and temperature characteristics have tg;} {c '. Din;; (L to improve. In a 25 ~ 85 ℃ temperature range, the change rate of not more than lO, the [4] Xu Tingxian, et al. Electronic ceramic materials [M]. Tianjin: Tianjin University Press,puma futrue cat, 1993 .22. insulation resistance at 10 \,6] Mo to ho,PUMA shoes wholesale, Lee standard English, Chau Kwok-leung. semiconducting ceramics and its sensitive components [M]. Shanghai: a typical dielectric relaxation properties of materials,ugg boots australia, the dielectric relaxation frequency fr ~ lO'kHz, refer [7 ] capsule shame, (3-4): 66. electric relaxation time rf ≈ lO \Jinan250100.China) A ~ tract: Rare-earthelementmodifiedSrTiO3ceramicscanbepreparedbyusingconventionalceramicsprocess.Thedielectricproper-tiesofSrTiOabasedceramics, (1 +) SrTiO3 + x (Ln ・ 4TiO2), wereinvestigated, andinfluenceofrare-earthelement, Ln (Ln = La,MAC 88 color eyeshadow, 03.Nd203, Y203orCe02), onthedielectricproperties, thetemperatureandfrequencycharacteristicsofe, andtg8ofSrTi03basedceramicswerereportedinthepaper.Keyword0: dielectricproperty; dielectrictemperaturecharacteristics; dielectricfrequencycharacteristics; conductivemechanism
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