ストロンチウムセレニド

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 危険有害性情報

  H301：飲み込むと有毒

  H331：吸入すると有毒

  H373：長期にわたる、または反復暴露により臓器の障 害のおそれ

  H400：水生生物に強い毒性

  H410：長期的影響により水生生物に非常に強い毒性

• 注意書き

  P260：粉じん/煙/ガス/ミスト/蒸気/スプレーを吸入しないこ と。

  P304+P340：吸入した場合：空気の新鮮な場所に移し、呼吸しやすい 姿勢で休息させること。

  P405：施錠して保管すること。

ストロンチウムセレニド 化学特性,用途語,生産方法

• 説明

  Strontium selenide has the molecular formula of SrSe and the molecular weight of 166.5852 g/mol. It is a white cubic crystal whose CAS number is 1315-07-7. Its melting point is 1605°C and its density is 4.54 g/cm³. It reacts with water and so cannot be prepared by an aqueous precipitation method. It can be prepared by the reaction of the oxide with Se metal:
  2SrO+ Se+ Heat ? SrSe+ SeO2
  It can also be prepared by reducing the selenate with hydrogen gas:
  SrSeO4 + 4H2 + heat ? SrSe+ 4H2O
  Strontium selenide and barium selenide both have a simple cubic structure, with cube edges equal to 3.117? and 3.308 ?, respectively. In the case of SrSe, the ions at the corners are Sr⁺⁺ and Se^--。

• 化学的特性

  white cub; -20 mesh with 99.5% purity [CER91] [CRC10]

• 物理的性質

  Phosphors can be categorized in accordance with their behavior as fluorescent, phosphorescent or stimulable. As used in this disclosure, such categories should be understood as based upon the predominant behavior of the phosphor at about room temperature, i.e at about 20°C.
  ? A “stimulable” phosphor is one that, at room temperature, stores energy absorbed upon exposure to excitation by electromagnetic radiation and releases the predominant portion of the stored energy upon exposure to stimulating electromagnetic radiation.
  ? A phosphorescent phosphor at room temperature will store absorbed energy for an appreciable time but will release the predominant portion of the stored energy spontaneously.
  ? A fluorescent phosphor will release the predominant portion of the absorbed energy as emission radiant energy substantially simultaneously with exposure to the exciting radiant energy.

• 使用

  The major usage of SrSe has been as an infrared stimulable phosphor. Photoluminescent materials useful for detection of infrared light are prepared using a base material, such as SrSe. Up to three dopants, Sm3+, cerium, Ce³⁺ and Eu²⁺ compounds are used for the purpose of providing electron traps. The base material can be a combination of alkaline earth metal selenides such as strontium selenide, calcium selenide, or a mixture of these. Luminescence is a long known phenomenon of nature reaching back very far in history. Recorded observations reach back to the last century. Seeback and Becquerel observed momentary visible afterglow in certain materials.

• 合成

  Pure SrSe is best obtainedfrom the selenite by high-temperature reduction with NH3.
  SrSeO3 + 2NH3 = SrSe + 3 H2O + N2

ストロンチウムセレニド 生産企業

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1315-07-7, ストロンチウムセレニド キーワード