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Titanium doping

For the visible and near-ultraviolet portions of the spectmm, tunable dye lasers have commonly been used as the light source, although they are being replaced in many appHcation by tunable soHd-state lasers, eg, titanium-doped sapphire. Optical parametric oscillators are also developing as useful spectroscopic sources. In the infrared, tunable laser semiconductor diodes have been employed. The tunable diode lasers which contain lead salts have been employed for remote monitoring of poUutant species. Needs for infrared spectroscopy provide an impetus for continued development of tunable infrared lasers (see Infrared technology and RAMAN spectroscopy). [Pg.17]

Laser Photochemistry. Photochemical appHcations of lasers generally employ tunable lasers which can be tuned to a specific absorption resonance of an atom or molecule (see Photochemical technology). Examples include the tunable dye laser in the ultraviolet, visible, and near-infrared portions of the spectmm the titanium-doped sapphire, Tfsapphire, laser in the visible and near infrared optical parametric oscillators in the visible and infrared and Line-tunable carbon dioxide lasers, which can be tuned with a wavelength-selective element to any of a large number of closely spaced lines in the infrared near 10 ]lni. [Pg.18]

Let us close this paragraph with MMCT transitions between two ions of the same element, one with the other with d configuration. Jorgensen [56] showed long ago that the simultaneous presence in 12 M hydrochloric acid of pale yellow Ti(IV) and blue Ti(III) yields a dark brownish-purple 1 1 complex with a stronger absorption band than the single constituents have. The broad absorption band has a maximum at 482 nm. The new absorption band is ascribed to a Ti(III)-Ti(IV) MMCT transition. A near-infrared absorption band in titanium-doped AI2O3 seems to be due to the same transition [57]. [Pg.166]

Mori M and Hiei Y. Thermal expansion behavior or titanium-doped La(Sr)Cr03 solid oxide fuel cell interconnects. J. Am. Ceram. Soc. 2001 84 2573-2578. [Pg.206]

Solid-state lasers, such as the ruby laser, neodymium doped yttrium aluminium garnet (Nd-YAG) laser and the titanium doped sapphire laser. [Pg.19]

S.S. Srinivasan, H.W. Brinks, B.C. Hauback, D. Sun, D., C.M. Jensen, Long term cycling behavior of titanium doped NaAlH4 prepared through solvent mediated milling of NaH and A1 with titanium... [Pg.117]

Jensen, C.M., Zidan, R., Mariels, N., Hee, A., Hagen, C. 1999. Advanced titanium doping of sodium aluminum hydride segue to a practical hydrogen storage material Int J Hydrogen Energy 24 461 65. [Pg.156]

Helgeson, O. Greneche, J-M Berry, F.J. Morup, St. Mosselmans, F. (2001) Tin- and titanium-doped y-Fe203 (maghemite). J. Phys. Condens. Matter 13 10785-10797... [Pg.588]

Further development of titanosihcates by Camblor and coworkers led to titanium doped zeolite with a high sihca content, a low alumina content and a 3-dimensional... [Pg.418]

Wu, X. L., and Lieber, C. (1990). Direct characterization of charge-density-wave defects in titanium-doped TaScj by scanning tunneling microscopy. Phys. Rev. B 41, 1239-1242. [Pg.404]

A new class of lasers, so called vibrionic solid state lasers, can emit—in contrast to mher solid slate lasers—a comparatively broad range of wavelengths. The lower level in these lasers is a band of energy levels that is caused by interaction between the electron motion and lattice vibrations. With ihe help of Ihe usual tools (filters, ctalons etc.) a narrow and tunable frequency bandwidth is selected for the laser output. The most popular materials arc Ti-sapphire. i.e.. titanium doped Al-Oi with output range from hOO to 118(1 nm and Alexandria. i.e.. chromium doped BeAFOi lasing between about 700 and 825 nm. [Pg.912]

Other oxidizing systems based on metals that can carry out regioselec-tive oxidations of secondary alcohols on a catalytic quantity are a titanium-doped zeolite in the presence of H20243 and the hydrotalcite R.U-C0-AI-CO3 HT in the air 44... [Pg.347]

The hydrogenation of spherical particles of an alloy BT5-1 proceeds without the induction period at 773 K with exothermic effect, therefore a temperature in autoclave raises up to 820 K (sample 1—4). The content of hydrogen in hydrogenation products answers the composition Ti(Al,Sn)Hi 8. On the diffractograms of products of hydrogenation only the reflexes of titanium hydride are observed with the constant of a crystal lattice a = 0.4434-0.4437 nm (for TiHL92 a = 0.4448 nm). The reduction of a diameter of alloy particles results in appreciable decrease of time of sample saturation by hydrogen with 4 h at a diameter of particles of 0.8 mm (sample 4) up to 10 min at a diameter of particles of 0.1 mm (sample 1). At that the density of titanium doped by A1 and Sn in... [Pg.322]

Chen H. R., Shi J. L., Yu J., Wang L. Z. and Yang D. S., Synthesis of titanium-doped ordered porous zirconium oxide with high-surface-area, Microporous and Mesoporous Materials 39 (2000) pp. 171-176. [Pg.210]

A) Synthetic fused silica. (B) Natural fused silica. (C) Titanium doped natural fused silica. (D) Cerium doped natural fused silica. (E) FVrex glass. (F) Nonex glass. [Pg.123]

Fig. 2. Lay-out of the Lund High-Power Laser Facility terawatt system, which operates with chirped-pulse amplification in titanium-doped sapphire (Adopted from Ref. [3]). Fig. 2. Lay-out of the Lund High-Power Laser Facility terawatt system, which operates with chirped-pulse amplification in titanium-doped sapphire (Adopted from Ref. [3]).
Harmonics are tuneable when the primary laser radiation is obtained from a tuneable laser, such as a titanium-doped sapphire (Ti S) unit However, the need for wavelength-dependent adjustments in the CPA chain can make the tuning procedure tedious. The laser system described in Sect. 2.2 is easier to tune. Since CPA techniques are not used the entire system tunes easily together with the DFDL oscillator. The peak power is still enough for this system to generate low... [Pg.216]

Vrouwenvelder, W.C.A., Groot, C.G., and de Groot, I<. (1994) Better histology and biochemistry for osteoblasts cultured on titanium-doped bioactive glass bioglass 45S5 compared with iron-, titanium-,... [Pg.111]

This builds on the key research carried out on titanium-doped mesoporous solids and their use in selective oxidations using hydrogen peroxide. Catechol and hydroquinone are now manufactured commerdally using the Enichem catalyst TS-1 (prepared from tetraethylorthosilicate and tetraethylorthotita-nate71) and hydrogen peroxide.72 Traditional methods of manufacture have low atom efficiency and the successful exploitation of new greener catalytic methods in such processes is very important.73,74... [Pg.75]

G.N. Kryukova, G.A. Zenkovets, N. Pfander, D.-S. Su, R. Schlogl Synthesis and characterization of the titanium doped nanostructural V2O5 ... [Pg.1057]

Laser based on a titanium-doped sapphire crystal. The typical power is a few watts, the wavelength tuneable from about 720 to 960 nm. The pulse width is in the range of 100 fs to a few ps, the repetition rate between 78 and 92 MHz. [Pg.2]

This is because this seems at present to be the most promising one for practical application in different areas. In addition to the favorable gravimetric storage density exceeding 5 %, this material was shown to be reversible, if titanium compounds are added to the alanate. Due to the high research activities and the promising properties of this system, the next (and main) section of this chapter will be devoted to titanium-doped NaAlH4. [Pg.213]

Titanium-Doped Sodium Aluminum Hydrides as Hydrogen Storage Materials... [Pg.213]


See other pages where Titanium doping is mentioned: [Pg.12]    [Pg.513]    [Pg.418]    [Pg.326]    [Pg.513]    [Pg.156]    [Pg.418]    [Pg.418]    [Pg.189]    [Pg.410]    [Pg.183]    [Pg.75]    [Pg.619]    [Pg.327]    [Pg.125]    [Pg.235]    [Pg.77]    [Pg.210]    [Pg.212]    [Pg.65]    [Pg.98]    [Pg.283]    [Pg.394]    [Pg.397]    [Pg.1027]   
See also in sourсe #XX -- [ Pg.920 ]




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