Alkali metal lanthanum bismuthate gallate infrared optical glass and method for making same
A metal lanthanum bismuth gallate and infrared optics technology, applied in the field of glass, can solve the problems of poor chemical stability, complex manufacturing process, and easy crystallization of fluoride glass and sulfide glass, and achieve good chemical stability.
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Embodiment 1
[0038] 1) The molar composition of each component is: 35% Bi 2 o 3 , 45% Ga 2 o 3 , 10% La 2 o 3 , 10%K 2 O;
[0039] 2) Take by weighing a total amount of 50 grams, and mix it uniformly in a mortar;
[0040] 3) Move the uniformly mixed powder in 2) to a platinum crucible, put it in an electric furnace and heat it to 1200°C, and keep it for 3 hours;
[0041] 4) Pour the melt into a stainless steel mold, cool it naturally, and then put it into a muffle furnace for annealing. The annealing process is controlled by a program, and the temperature is kept at 400°C for 24 hours, and then cooled to room temperature;
[0042] 5) The glass sample is cut, finely ground and polished into a 20×20×2mm sample.
[0043] 6) Meticon Model 2010 Prism Coupler waveguide analyzer is used to test its refractive index to be 2.41.
[0044] 7) SDT Q600 thermogravimetric analyzer was used to test the thermal properties, and the difference ΔT between the crystallization temperature and the tran...
Embodiment 2
[0048] The molar composition of each component is: 40% Bi 2 o 3 , 42% Ga 2 o 3 , 8% La 2 o 3 , 10% Na 2 O;
[0049] According to the preparation method of Example 1, the temperature in step 3) is controlled at 1000° C. and kept for 5 hours; the annealing temperature in step 4) is 300° C. and kept for 20 hours. The refractive index of the obtained infrared optical glass is 2.414, the difference between crystallization temperature and transition temperature ΔT is about 130°C, and its infrared transmittance is as follows: figure 2 As shown, its infrared transmission range is 0.46μm to 7.2μm.
Embodiment 3
[0051] The molar composition of each component is: 45% Bi 2 o 3 , 30% Ga 2 o 3 , 5% La 2 o 3 , 10%K 2 O, 10% Na 2 O;
[0052] According to the preparation method of Example 1, the temperature in step 3) is controlled at 1300° C. and kept for 2 hours; the annealing temperature in step 4) is 350° C. and kept for 30 hours. The refractive index of the obtained infrared optical glass is 2.42, and the difference ΔT between the crystallization temperature and the transition temperature is about 150°C. Infrared transmittance as image 3 As shown, its infrared transmission range is 0.5μm to 7.2μm. The schematic diagram of the thermogravimetric test is as follows: Figure 4 shown.
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