SrTiO

AI2O3, BeO, AIN BaTiO, SrTiO, Ti02 Pb(Zr2 Ti )03, Si02 (quartz)... 

Oo, and Sr ferrites mixed sulfides such as Zn—OdS and Pb—OdS and coated particles such as Ee O with Al(OH)2 or Or(OH)2. OontroUed hydrolysis of alkoxides has also been used to produce submicrometer Ti02, doped Ti02, Zr02, doped Zr02, doped Si02, SrTiO, and even cordierite powders (1,3). 

Strontium Titanate. Strontium titanate [12060-59-2], SrTiO, is a ceramic dielectric material that is insoluble in water and has a specific gravity of 4.81. It is made from strontium carbonate and is used in the form of 0.5-mm thick disks as electrical capacitors in television sets, radios, and computers. 

Strontium titanate [12060-59-2] SrTiO, becomes an n-ty e semiconductor when additional electrons are created on the Ti lattice sites by donor doping or when oxygen is removed from the material through heat treatment in a reducing atmosphere. The mobiUty of the electrons in the conduction band is about 6 crc] j(V-s). On the other hand, when ZnO is reduced, 2inc interstitials are formed and these act as donors, each yielding a free electron. 

Tin oxide and indium oxide [1312-43-2] Iu202, are other important semiconductors that are doped to increase conductivity. Sn02, Iu202, Ti02, and in particular, SrTiO, are transparent to visible light and are often used as transparent electrodes, for example, on vidicon tubes. 

Other interesting thin-film studies using AES have included the growth of platinum on Ti02- and SrO-terminated (100) SrTiOs single-crystal substrates [2.154], of epitaxial niobium films on (110) T1O2 [2.155], the interaction of copper with a (0001) rhenium surface [2.156], and the characterization of radio-frequency (rf) sputtered TiN films on stainless steel [2.157]. 

Figure 5. Thennal strain for SrTiOs heated along cubic [001] under different stress conditions.

M. Liu, T.R. Finlayson, and T.F. Smith, Fligh-resolution delatometry measurements of SrTiOs along cubic and tetragonal axes, Phys. Rev. B (1996) (in press). 

T. Riste, E.J. Samuelson, K. Otnes, and J. Feder, Critical behaviour of SrTiOs near the... 

J.B. Hastings, S.M. Shapiro, and B.C. Frazer, Central-peak enhancement in hydrogen-reduced SrTiOs, Phys. Rev. Lett. 10 4 (1978). 

Fig. 1. Diffuse reflection spectrum of SrTiOs (fl) and SrTiOj LaCrOj (0.5 mole %) (h). The extra absorption in (b) is due to Cr (III) Ti(IV) MMCT...

Mavroides, G., Kafalas, J.A., and Kolesar, D.F., Photoelectrolysis of water in cells with SrTiOs anodes, Appl. Phys. Lett., 28,241,1976. 

Domen, K., Kudo, A., and Onishi, T., Mechanism of photocatalytic decomposition of water into hydrogen and oxygen over nickel (II) oxide-strontium titanate (SrTiOs), /. Catal, 102,92,1986. 

Figure 8.16 Mixed conductivity in SrThFe O -j, (a) schematic variation of conductivity and (h) experimental conductivity for SrTio.5Feo.5C>3 8. [Data adapted from S. Steinsvik, R. Bugge, J. Gjpnnes, J. Taftp, and T. Norby, J. Phys. Chem. Solids, 58, 969-979 (1997).]...

Figure 3. The phase of the electron exit wave depicts the structure of one unit cell of a S13 boundary in SrTiOs. Ti/O, Sr, and O columns are resolved and intensity profiles across selected directions are shown. Intensity on O-columns is generated by 10 atoms. Sub Angstrom resolution is achieved.

Domen, K., Naito, S., Onishi, T., Tamaru, K. 1982. Photocatalytic decomposition of liquid water on a NiO-SrTiO, catalyst. Chem Phys Lett 92 433 34. 

Further details are discussed in [2]. Figure 1 shows the PDF of SrTiOs [4]. The first negative peak at 1.95 A is due to Ti - O pairs, and is negative because the scattering length of Ti is negative. The PDF is given in the absolute units. Thus... 

Fig.1 PDF of SrTiOs determined by pulsed neutron diffraction, compared to the PDF calculated for the model structure. Small oscillations at low r are termination errors [4]...

Ferroelectricity of SrTiOs Induced by Oxygen Isotope Exchange... 

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