Bismuth titanate

Bismuth titanate or bismuth titanium oxide is a solid inorganic compound of bismuth, titanium and oxygen with the chemical formula of Bi12TiO20, Bi 4Ti3O12 or Bi2Ti2O7

Bi12TiO20

Bi12TiO20 crystal[1]

Bi12TiO20 crystal structure[2]
Names
Other names
Bismuth titanium oxide, dodecabismuth titanate[3]
Identifiers
3D model (JSmol)
Properties
Bi12TiO20
Molar mass 2875.62
Odor odorless
Density 9.03 g/cm3[2]
Melting point 875 °C (1,607 °F; 1,148 K) Decomposes to Bi4Ti3O12 and Bi2O3[4]
insoluble
Structure
body-centered cubic, cI66[4][2]
I23, No. 197
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Bi4Ti3O12

Bi4Ti3O12 crystal structure[5]
Names
Other names
Bismuth titanium oxide
Identifiers
ChemSpider
EC Number
  • 234-564-6
Properties
Bi4Ti3O12
Molar mass 1171.5
Odor odorless
Density 7.95 g/cm3[5]
insoluble
Band gap 3.5 eV
Structure
Orthorhombic, oS76[5]
Aba2, No. 41
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Bi2Ti2O7
Identifiers
3D model (JSmol)
EC Number
  • 234-986-0
Properties
Bi2O7Ti2
Molar mass 625.688 g·mol−1
Odor odorless
insoluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Synthesis

Bismuth titanate ceramics can be produced by heating a mixture of bismuth and titanium oxides. Bi12TiO20 forms at 730–850 °C, and melts when the temperature is raised above 875 °C, decomposing in the melt to Bi4Ti3O12 and Bi2O3.[4] Millimeter-sized single crystals of Bi12TiO20 can be grown by the Czochralski process, from the molten phase at 880–900 °C.[1]

Properties and applications

Bismuth titanates exhibit electrooptical effect and photorefractive effect, that is, a reversible change in the refractive index under applied electric field or illumination, respectively. Consequently, they have potential applications in reversible recording media for real-time holography or image processing applications.[4][1]

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See also

References
  1. Shen, Chuanying; Zhang, Huaijin; Zhang, Yuanyuan; Xu, Honghao; Yu, Haohai; Wang, Jiyang; Zhang, Shujun (2014). "Orientation and Temperature Dependence of Piezoelectric Properties for Sillenite-Type Bi12TiO20 and Bi12SiO20 Single Crystals". Crystals. 4 (2): 141. doi:10.3390/cryst4020141.
  2. Efendiev, Sh. M.; Kulieva, T. Z.; Lomonov, V. A.; Chiragov, M. I.; Grandolfo, M.; Vecchia, P. (1982). "Crystal Structure of Bismuth Titanium Oxide Bi12TiO20". Physica Status Solidi A. 74: K17. doi:10.1002/pssa.2210740148.
  3. Yaws, Carl L. (2015). The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals: Physical Properties for More Than 54,000 Organic and Inorganic Chemical Compounds, Coverage for C1 to C100 Organics and Ac to Zr Inorganics. Elsevier Science. p. 698. ISBN 978-0-12-801146-1.
  4. Santos, D. J.; Barbosa, L. B.; Silva, R. S.; MacEdo, Z. S. (2013). "Fabrication and Electrical Characterization of Translucent Bi12TiO20 Ceramics". Advances in Condensed Matter Physics. 2013: 1. doi:10.1155/2013/536754.
  5. Van Uitert, L. G.; Egerton, L. (1961). "Bismuth Titanate. A Ferroelectric". Journal of Applied Physics. 32 (5): 959. doi:10.1063/1.1736142.
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