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- W2364079191 abstract "TiO_2 powder which was doped with Mg~(2+) at different mole percent of x(Mg~(2+)/Ti~(4+)) was prepared by sol-gel routing and using Ti(OC_4H_9)_4,C_2H_5OH and Mg(NO_3)_2 as the raw materias.The structure size and appearance of powders were characterized by XRD,TEM and TG-DTA,and its polymorphic transition between anatase and rutile of TiO_2 crystal type was also studied.The experimental results show that the average particle sizes of powders are in nanometer scale and the particle size at a mole percent of(x(Mg~(2+)/Ti~(4+)))=1.0% reduces to about 40nm while the particle size of TiO_2 powder without Mg~(2+) is about 60nm;When the mole percent of x(Mg~(2+)/Ti~(4+))=2.0%,the solubility of Mg~(2+) in TiO_2 reaches its saturation and the XRD spectrum of the powder has the character spectrum of MgTi_2O_5;Mg~(2+) doping can retard the transition of TiO_2 from anatase to rutile and the retarding effect is enhanced with increment of mole percent of x(Mg~(2+)/Ti~(4+));The reason for the retarding effect is also analyzed;Therefore,proper mole percent of x(Mg~(2+)/Ti~(4+)) is useful to prepare TiO_2 powders of anatase which has higher thermo-stability." @default.
- W2364079191 created "2016-06-24" @default.
- W2364079191 creator A5044712379 @default.
- W2364079191 date "2005-01-01" @default.
- W2364079191 modified "2023-09-26" @default.
- W2364079191 title "Effects of Mg~(2+) Doping on Polymorphic Transition of TiO_2 Powders and Mechanism" @default.
- W2364079191 hasPublicationYear "2005" @default.
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