Tunable laser crystal chrome-doped sodium magnesium molybdate and preparation method thereof
A laser crystal, chromomolybdic acid technology, applied in crystal growth, chemical instruments and methods, optics, etc., can solve problems such as inability to industrial applications, and achieve the effects of moderate mechanical properties, easy availability of raw materials, and wide wavelength band.
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[0021] The raw material for growth is Na 2 Mg 5 (MoO 4 ) 6 :Na 2 Mo 2 o 7 : Cr 2 o 3 =1:3:0.05 (molar ratio), doped with 2at.% Cr 3+ Ions (Cr in raw materials 3+ Moles / Cr in raw materials 3+ with Mg 2+ total number of moles). The growth is carried out by the molten salt top seed crystal method, the raw material is placed in a platinum crucible with a size of φ60×50mm, the growth temperature is 880→800°C, the cooling rate is 1°C / day, and the crystal rotation speed is 15 revolutions / min. In 15 days, a size of better quality Cr 3+ :Na 2 Mg 5 (MoO 4 ) 6 crystals. The analysis by ICP (plasma emission spectrometry) shows that Cr in the crystal 3+ The ion content is 8.42×10 19 cm 3 , Cr 3+ The segregation coefficient of ions is 0.52.
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