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Bismuth silicon oxide

Bismuth silicate

Bismuth silicon oxide or bismuth silicate refers to an inorganic compound of bismuth, silicon and oxygen. The bismuth silicate Bi12SiO20 is most commonly encountered, though others are also known. It occurs naturally as the mineral sillénite and can be produced synthetically by heating a mixture of bismuth oxide and silicon dioxide. Centimeter-sized single crystals of Bi12SiO20 can be grown by the Czochralski process from the molten phase. They exhibit piezoelectric, electro-optic, elasto-optic, photorefractive and photoconductive properties, and therefore have potential applications in spatial light modulators, acoustic delay lines and hologram recording equipment. Bi12SiO20 can be obtained as a whitish powder with band gap of approximately 3.2 eV starting from bismuth subcarbonate and silica in presence of ethyleneglycol.

Other bismuth silicates are known, such as Bi4Si3O12, Bi2SiO5, and Bi2Si3O9.

References

References

  1. (2014). "Orientation and Temperature Dependence of Piezoelectric Properties for Sillenite-Type Bi12TiO20 and Bi12SiO20 Single Crystals". Crystals.
  2. (1993). "Growth and characterization of Bi12(Si1−xTix)O20 mixed crystals". Journal of Applied Physics.
  3. (2014). "Synthesis, crystal growth and mechanical properties of Bismuth Silicon Oxide (BSO) single crystal". Journal of Alloys and Compounds.
  4. "Photorefractive crystals | 4Lasers".
  5. (Mar 2023). "The elastic anisotropy, electronic and optical properties of Bi4Si3O12, Bi2SiO5, Bi12SiO20 and Bi2Si3O9 crystals from first-principles calculations". Chemical Physics Letters.
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