Chromium-doped lithium tungstate magnesium crystal as well as preparation and application thereof
A technology of lithium chromate tungstate and crystal, which is applied in the field of optoelectronic functional materials, can solve the problems of small tuning range, difficult growth, small absorption coefficient, etc., and achieve the effects of wide tunable laser band, stable growth process, and moderate mechanical properties
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Embodiment 1
[0020] Embodiment 1: adopt 75at.% Li 2 WO 4 and 250at.% WO 3 The mixture is used as a flux to grow Cr 3+ Cr with an ion concentration of 0.23 at.% 3+ : Li 2 Mg 2 (WO 4 ) 3 the crystal
[0021] The growth material is Li 2 Mg 2 (WO 4 ) 3 : Flux = 0.45: 0.55 (molar ratio), doped with 0.25at.% Cr 2 o 3 . Accurately weigh the raw materials according to the above ratio (accurate to 0.005g), grind and mix them evenly, and place them in a platinum crucible with a size of φ60×50mm. The growth temperature is 880°C→820°C, and the cooling rate is 2°C / day. The crystal rotation speed is 15 rpm, and after 30 days, a crystal with a size of φ40×10×1.2mm is grown 3 Cr 3+: Li 2 Mg 2 (WO 4 ) 3 crystals. The plasma emission spectrometry analysis showed that the Cr in the crystal 3+ The ion content is 0.23 at.%.
Embodiment 2
[0022] Embodiment 2: adopt 75at.% Li 2 WO 4 and 25 at.% WO 3 The mixture is used as a flux to grow Cr 3+ Cr with an ion concentration of 4.8 at.% 3+ : Li 2 Mg 2 (WO 4 ) 3 the crystal
[0023] The growth material is Li 2 Mg 2 (WO 4 ) 3 : Flux = 0.35: 0.65 (molar ratio), doped with 5 at.% Cr 2 o 3 . Accurately weigh the raw materials according to the above ratio (accurate to 0.005g), grind and mix them evenly, and place them in a platinum crucible with a size of φ60×50mm. The growth temperature is 845°C → 815°C, and the cooling rate is 1.5°C / day. The crystal rotation speed is 25 rpm, and after 20 days, a crystal with a size of φ25×8×1mm is grown 3 Cr 3+ : Li 2 Mg 2 (WO 4 ) 3 crystals. The plasma emission spectrometry analysis showed that the Cr in the crystal 3+ The ion content is 4.8 at.%.
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