バリウムセレニド

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Warning

• 危険有害性情報

  H302：飲み込むと有害

  H315：皮膚刺激

  H319：強い眼刺激

  H335：呼吸器への刺激のおそれ

• 注意書き

  P280：保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。

  P305+P351+P338：眼に入った場合：水で数分間注意深く洗うこと。次にコ ンタクトレンズを着用していて容易に外せる場合は外す こと。その後も洗浄を続けること。

バリウムセレニド 化学特性,用途語,生産方法

• 説明

  Barium selenide has the molecular formula of BaSe and the molecular weight of 216.2956 g/mol. Its CAS number is 1304-39-8. It is a white crystalline powder having a melting point of 1782°C. Its density is 5.02 g/cm³. It reacts with water so that an aqueous method of precipitation cannot be used to prepare this compound. Barium selenide is very moisture sensitive, and must be handled under inert conditions. It can be prepared by reaction of the oxide or carbonate with Se, or by the reduction of the selenate with hydrogen gas:
  2BaCO3+ 5Se+ Heat 2BaSe+ 3SeO2+ CO2
  BaSeO4+ 4H2 BaSe+ 4H2O
  Strontium selenide and barium selenide both have a simple cubic structure, with cube edges equal to 3.117 and 3.308 , respectively.

• 化学的特性

  Crystalline powder. Decomposes in water.

• 使用

  Barium selenide has been used to construct a photocell that has been used extensively to measure the solar irradiance of the Sun at various points on the globe. It is used because other photocell elements like selenium tend to decline in output and saturate under the intense radiance of the Sun. BaSe remains quasi-linear and can be used to measure intensity from 2000 to 7200 using a double monochrometer as a spectrum analyzer. As a portable unit, it uses narrowband (20–50 halfwidth) interference glass filters in 14 steps as a spectrum analyzer over the range 3100 to 16,300 , but the recording is manual. The field of view is <3° of the solar irradiance over the face of the Sun.
  BaSe is available commercially as a sputtering target or in limited quantities as a powder.

• 合成

  BaSeO4 + 4 H2 = BaSe + 4 H2O
  The selenate (about 1 g.) is distributed in a thin layer over a quartz boat 10 cm. long and 1 cm. wide. The drying at 200°C is repeated, this time in a reaction tube and in a stream of N2. Reduction in a stream of H2 follows. It should continue for two hours at 500°C for BaSeO4.
  

バリウムセレニド 生産企業

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1304-39-8, バリウムセレニド キーワード