Cobalt-nickel co-doped ZnAl2O4 nanocrystalline glass and preparation method thereof
A znal2o4, co-doping technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of reducing the service life of glass, growing crystals, and consuming time
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[0025] The invention provides a cobalt-nickel co-doped ZnAl 2 o 4 The preparation method of nanocrystalline glass comprises the following steps:
[0026] A) will include SiO 2 、Al 2 o 3 , ZnO, TiO 2 , CoO, NiO and Mn 2 o 3 The raw materials are mixed, melted, and solidified;
[0027] The SiO 2 、Al 2 o 3 , ZnO, TiO 2 , CoO, NiO and Mn 2 o 3 The molar ratio is 20~50:8~50:9~23:2~16:0.002~0.5:0.003~0.9:0.002~0.7;
[0028] B) Heat the solidified sample at 540-560°C, then cool it to 190-210°C at 0.8-1.2°C / min, and then cool it naturally to obtain a glass sample;
[0029] C) The glass sample is sliced, polished, nucleated, and crystallized to obtain cobalt-nickel co-doped ZnAl 2 o 4 nanocrystalline glass;
[0030] The crystallization is carried out in the presence of an electric field.
[0031] In step A):
[0032] In some embodiments of the present invention, the SiO 2 、Al 2 o 3 , ZnO, TiO 2 , CoO, NiO and Mn 2 o 3 The molar ratio is 20-50:8-50:9-23:2-16:0.0...
Embodiment 1
[0061] 1) Select SiO with a molar ratio of 25:50:23:2:0.002:0.003:0.002 2 、Al 2 o 3 , ZnO, TiO 2 , CoO, NiO and Mn 2 o 3 The raw materials are mixed in an alumina crucible, put into a silicon-molybdenum rod furnace at 1350°C for preheating, and then heated up to 1600°C at 10°C / min, kept for 3 hours and then poured into a 250°C iron plate to solidify and form;
[0062] 2) Put the solidified sample into the annealing furnace, keep it at 550°C for 2 hours, then cool it down to 200°C at 1°C / min, close the annealing furnace, and cool it down to room temperature naturally to obtain a glass sample;
[0063] 3) Cut the glass sample into thin slices of 2cm×2cm×0.5cm with a wire cutting machine, polish the upper and lower surfaces into a mirror surface, put it into a thermoelectric coupling device, and start the heating program to raise the temperature at 10°C / min to 650°C, nucleate at 650°C for 2 hours, heat up to 780°C at 10°C / min, crystallize at 780°C and apply an electric field...
Embodiment 2
[0071] 1) Select SiO with a molar ratio of 50:25:9:16:0.5:0.9:0.7 2 、Al 2 o 3 , ZnO, TiO 2 , CoO, NiO and Mn 2 o 3 The raw materials are mixed in an alumina crucible, put into a silicon-molybdenum rod furnace at 1350°C for preheating, and then heated up to 1600°C at 10°C / min, kept for 3 hours and then poured into a 250°C iron plate to solidify and form;
[0072] 2) Put the solidified sample into the annealing furnace, keep it at 550°C for 2 hours, then cool it down to 200°C at 1°C / min, close the annealing furnace, and cool it down to room temperature naturally to obtain a glass sample;
[0073] 3) Cut the glass sample into thin slices of 2cm×2cm×0.5cm with a wire cutting machine, polish the upper and lower surfaces into a mirror surface, put it into a thermoelectric coupling device, and start the heating program to raise the temperature at 10°C / min to 620°C, nucleate at 620°C for 2 hours, heat up to 800°C at 10°C / min, crystallize at 800°C and apply an electric field at th...
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