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Barium Compounds
   Barium carbonate
   Barium chloride
   Barium ferrite
   Barium nitrate
   Barium titanate
   Han purple
   Yttrium barium copper oxide
Barium carbonate BaCO3
Also known as witherite, it is used for the preparation of rat poison, in the manufacture of glass and porcelain, and formerly for refining sugar.
Barium chloride BaCl2
: Highly Toxic :
It is used in the manufacture of pigments and is used in fireworks to give a bright green colour.
Barium ferrite BaFe
It is used in magnetic stripe cards. Barium ferrite is a natural crystal that does not absorb moisture, does not corrode, and does not undergo chemical change. Unlike magnetic particles (MP), BaFe does not have to be surface treated, does not have to be chemically stabilized, nor does it have to be maintained in a tightly controlled environment.
Barium nitrate Ba(NO3)2
: Irritant : Toxic :
A component of Baratol (the others being TNT and a binder). When mixed with aluminium powder it forms a high explosive. It is mixed with Thermite to form Thermate-TH3, used in military thermite grenades.
Barium titanate BaTiO3
Barium titanate is used as a dielectric material for ceramic capacitors, and as a piezoelectric material for microphones and other transducers. As a piezoelectric material, it was largely replaced by lead zirconate titanate, also known as PZT.
Polycrystalline barium titanate displays positive temperature coefficient, making it an useful material for thermistors and self-regulating electric heating systems.
Han purple BaCuSi2O6
A pigment that has been used in China for over 2,000 years. The terracotta warriors in Xian were dyed with it. Chinese alchemists first synthesized Han Purple from barium copper silicates. It was used in large imperial projects and pottery.
Yttrium barium copper oxide YBa2Cu3O7-x
YBCO was the first material to become superconducting above 77 K (the boiling point of nitrogen). All materials developed before YBCO became superconducting only at temperatures near the boiling points of liquid helium or liquid hydrogen (20.1 K). The significance of the discovery of YBCO is the break through in the refrigerant used to cool the material to below the critical temperature.