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    • 2. 发明专利
    • Photochromic material comprising rare earth ion added alkali halide crystal
    • 包含稀土元素的光致变色材料添加碱金属氢化物晶体
    • JP2005272217A
    • 2005-10-06
    • JP2004088556
    • 2004-03-25
    • Katsuharu Tanaka克治 田中
    • TANAKA KATSUHARUKANEMITSU YOSHIHIKO
    • C01F11/20C09K9/00
    • PROBLEM TO BE SOLVED: To provide an inorganic substance which reversibly causes a photochromic phenomenon upon irradiation with light in a visible region at room temperature.
      SOLUTION: A great number of lattice defects are produced in rare earth ion added alkali halide crystals, whereby electrons of rare earth ions can easily be released to many neighbor lattice defects even by light excitation which does not reach a conduction band of the base. When the released electrons are captured by the lattice defects, a color center is formed. If a great number of such color centers are formed, these can be observed as variation of an absorption spectrum.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供在室温下在可见光区域照射时可逆地引起光致变色现象的无机物质。 解决方案:稀土离子加入的碱金属卤化物晶体中产生大量的晶格缺陷,由此稀土离子的电子可以很容易地被释放到许多相邻的晶格缺陷,即使是通过没有达到 基础。 当释放的电子被晶格缺陷捕获时,形成颜色中心。 如果形成大量这样的色心,则可以观察到这些吸收光谱的变化。 版权所有(C)2006,JPO&NCIPI