To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

Barium orthotitanate

From Wikipedia, the free encyclopedia

Barium orthotitanate is the inorganic compound with the chemical formula Ba2TiO4. It is a colourless solid that is of interest because of its relationship to barium titanate, a useful electroceramic.

YouTube Encyclopedic

  • 1/3
    Views:
    3 996
    788
    5 966
  • Barium Titanate experiments free energy
  • nano zeolite chemtrail Detox Hydrated alkali aluminum silicate barium potassium calcium sodium
  • Phase transition Barium titanate single crystal

Transcription

Structure

Low-temperature Ba2TiO4 – TiO4 tetrahedra shaded blue; Ba atoms green; O atoms red

The solid has two known phases: a low-temperature (β) phase with P21/n symmetry[1] and a high-temperature (α) phase with P21nb symmetry.[2] The structure of Ba2TiO4 is unusual among the titanates because its titanium atoms sit in a four-oxygen tetrahedron rather than a six-oxygen octahedron.[1][3]

Production

It forms as white crystals from a melt of BaCl2, BaCO3 and TiO2[4] or from just sintering BaCO3 and TiO2.[5] Another method of preparation is heating pellets of Ba(OH)2 and TiO2.[6] Additionally, there are polymer precursor, sol-gel and reverse micellar routes to Ba2TiO4 synthesis.[3] Ba2TiO4 has also been successfully grown as a thin film with chemical vapor deposition.[7]

Properties

Barium orthotitanate can remove up to 99.9% of CO
2
from a high-temperature gas stream[10] by the reaction:

Ba
2
TiO
4
+ CO
2
BaTiO
3
+ BaCO
3

References

  1. ^ a b Wu, Kang Kun; Brown, I. D. (10 April 1973). "The Crystal Structure of β-Barium Orthotitanate, β-Ba2TiO4, and the Bond Strength-Bond Length Curve of Ti-O". Acta Crystallographica. B29 (9): 2009–2012. doi:10.1107/S0567740873005959.
  2. ^ Günter, John R.; Jameson, Geoffrey B. (14 September 1983). "Orthorhombic Barium Orthotitanate, α-Ba2TiO4". Acta Crystallographica. C40: 207–210. doi:10.1107/S0108270184003619.
  3. ^ a b Shanker, Vishnu; Ahmad, Tokeer; Ganguli, Ashok K. (October 2004). "Investigation of Ba2–xSrxTiO4: Structural aspects and dielectric properties". Bulletin of Materials Science. 27 (5): 421–427. doi:10.1007/BF02708558.
  4. ^ Bland, J. A. (August 1961). "The Crystal Structure of Barium Orthotitanate, Ba2TiO4". Acta Crystallographica. 14 (8): 875–881. doi:10.1107/S0365110X61002527.
  5. ^ Bobovich, Ya. S. "The Raman Scattering of Barium Orthotitanate". Optics and Spectroscopy. 13: 254–255.
  6. ^ a b Todd, S. S.; Lorenson, R.E. (August 1952). "Heat Capacities at Low Temperatures and Entropies at 298.16K. of Orthotitanates of Barium and Strontium". Journal of the American Chemical Society. 74 (15): 2043–2045. doi:10.1021/ja01135a014.
  7. ^ Guo, Dongyun; Goto, Takashi; Wang, Chuanbin; Shen, Qiang & Zhang, Lianmeng (2012). "High-speed growth of (103)-oriented Ba2TiO4 film by laser chemical vapor deposition". Materials Letters. 70: 135–137. doi:10.1016/j.matlet.2011.11.094.
  8. ^ Ahmad, Tokeer; Ganguli, Ashok K. (1 October 2004). "Synthesis of nanometer-sized particles of barium orthotitanate prepared through a modified reverse micellar route: Structural characterization, phase stability and dielectric properties". Journal of Materials Research. 19 (10): 2905–2912. Bibcode:2004JMatR..19.2905A. doi:10.1557/JMR.2004.0406.
  9. ^ Jaffe, Bernard; Cook Jr., William R.; Jaffe, Hans (1971). "5. Barium Titanate". Piezoelectric Ceramics. London and New York: Academic Press. p. 62. ISBN 0123795508.
  10. ^ Saito, Yoshinori; Sato, Hideto; Sakabe, Yukio (20 May 2008). "CO2 Recovery at High Temperatures Using Ba2TiO4". Journal of Chemical Engineering of Japan. 41 (5): 441–446. doi:10.1252/jcej.07WE236.
This page was last edited on 26 December 2023, at 16:23
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.