Thulium doped lead fluoride crystal and preparation method thereof
A technology of lead fluoride and crystal, applied in the field of thulium-doped lead fluoride crystal and its preparation
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Embodiment 1
[0015] Embodiment 1: temperature gradient method grows Tm 0.01 PbF 2.03 the crystal
[0016] The high-purity raw material TmF 3 and PbF 2 According to molecular formula Tm 0.01 PbF 2.03 The molar ratio is for the ingredients to be fully mixed evenly, dehydrated at 150°C for 14 hours, and the charging container is polytetrafluoroethylene. Take it out and press it into a block, put it into a graphite crucible, the growth atmosphere is argon, cover the top of the crucible, raise the temperature at 50°C / hour to 920°C and keep it for 10 hours, then grow the crystal at a cooling rate of 4°C / hour, and the growth is over Then cool down to room temperature at a cooling rate of 20°C / hour.
Embodiment 2
[0017] Embodiment 2: Temperature gradient method grows Tm 0.05 PbF 2.15 the crystal
[0018] In this embodiment, the high-purity raw material TmF 3 and PbF 2 According to molecular formula Tm 0.05 PbF 2.15 For proportioning, the raw materials were dehydrated at 120°C for 16 hours and then put into a graphite crucible, and PbF was placed at the bottom of the crucible 2 The crystal is used as the seed crystal, and the growth atmosphere is CF 4 Protective gas, cover the top of the crucible, increase the temperature at 40°C / hour to 940°C for 8 hours, then grow crystals at a rate of 3°C / hour, and cool to room temperature at a rate of 30°C / hour after growth.
Embodiment 3
[0019] Embodiment 3: temperature gradient method grows Tm 0.1 PbF 2.3 the crystal
[0020] In this embodiment, the high-purity raw material TmF 3 and PbF 2 According to molecular formula Tm 0.1 PbF 2.3 For proportioning, the raw materials are dehydrated at 120°C for 12 hours and then put into a graphite crucible, and PbF is placed at the bottom of the crucible 2 The crystal is used as a seed crystal, the growth atmosphere is argon, the top of the crucible is covered, the temperature is raised to 960°C at a rate of 45°C / hour for 8 hours, and the crystal is grown at a temperature of 4°C / hour. The cooling rate is to cool to room temperature.
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