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- W2370422885 abstract "Excellent performances of SrTiO3 grain boundary barrier layer capacitors can be maintained when Sr/Ti mole ratio changes within a certain range provided that the quantity of the additives of Nb2O5,La2O3 and SiO2 change correspondently. It is preferable that when r (Sr/Ti) = 1, the ratio of Nb2O5 and La2O3 is equimolar; when TiO2 is excessive, reduce Nb2O5; when SrO is excessive, reduce La2O3 and increase SrO2 appropriately. The ideal r (Sr/Ti) is within the range of 0.994 ~ 0.998. In this case, the loose density is good; the resistivity of the fired sample is as low as 0.2 ~ 0.3 W·cm;the crystal size is 40 ~ 50 mm and homogeneous; and the oxidized ceramic disks have ideal performances. er =55 000 ~ 68 000, tgd 1?102, r50V 5?1010 W·cm, VB(DC) ≈ 600 V/mm, |DC·C-1|(25 ~ +25℃) 10%. The activation energy is lower, when anatase (A) TiO2 reacts to SrCO3, compared with rutile phase (R). SrTiO3 formed directly without the course of decomposition of SrCO3. The different mechanism of solid-state reaction results in different microstructure. Better grain boundary barrier layer ceramics can be obtained, when r (Sr/Ti) and the ratio of rutile phase (R) to anatase (A) in the raw material of TiO2 been adjusted." @default.
- W2370422885 created "2016-06-24" @default.
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- W2370422885 date "2002-01-01" @default.
- W2370422885 modified "2023-09-23" @default.
- W2370422885 title "The Influence of Sr/Ti and Crystal Type of TiO_2 on the Dielectric Properties of SrTiO_3" @default.
- W2370422885 hasPublicationYear "2002" @default.
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