A kind of method is the method for synthesizing mullite whisker with kalephine as raw material
A technology for synthesizing mullite and potassium nepheline, applied in chemical instruments and methods, single crystal growth, single crystal growth and other directions, can solve the problems of complicated preparation process, high preparation cost, high price and the like, and achieves simplified reaction process, The effect of reducing the reaction temperature of molten salt and low cost
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Embodiment 1
[0021] Step 1: Kalnite, deionized water, H 2 SO 4 (mass concentration 98%) and Al 2 (SO 4 ) 3 Mix at a molar ratio of 1:5:0.1:0.4 to make a suspension;
[0022] Step 2: Add the prepared suspension into the reaction kettle, place the reaction kettle in a microwave hydrothermal reactor for hydrothermal reaction, the reaction temperature is 120°C, the reaction time is 80min, the filling ratio of the reaction kettle is 0.4;
[0023] Step 3: Pour the liquid in the reactor after the microwave hydrothermal reaction into an evaporating dish, and place the evaporating dish in an oven for drying; the drying temperature is 50°C, and the drying time is 10 hours;
[0024] Step 4: Put the dried product in a muffle furnace for molten salt reaction, and the reacted product is ground, washed with water, and centrifuged to remove the molten salt adsorbed on the surface, and the obtained product is mullite whisker. Wherein, the molten salt reaction temperature is 400° C., and the reaction ...
Embodiment 2
[0027] Step 1: Kalnite, deionized water, H 2 SO 4 (mass concentration 98%) and Al 2 (SO 4 ) 3 Mix at a molar ratio of 1:5:0.2:0.6 to make a suspension;
[0028] Step 2: Add the prepared suspension into the reaction kettle, place the reaction kettle in a microwave hydrothermal reactor for hydrothermal reaction, the reaction temperature is 140°C, the reaction time is 60min, the filling ratio of the reaction kettle is 0.5;
[0029] Step 3: Pour the liquid in the reactor after the microwave hydrothermal reaction into an evaporating dish, and place the evaporating dish in an oven for drying; the drying temperature is 60°C, and the drying time is 8 hours;
[0030] Step 4: Put the dried product in a muffle furnace for molten salt reaction, and the reacted product is ground, washed with water, and centrifuged to remove the molten salt adsorbed on the surface, and the obtained product is mullite whisker. Wherein, the molten salt reaction temperature is 500° C., and the reaction t...
Embodiment 3
[0035] Step 1: Kalnite, deionized water, H 2 SO 4 (mass concentration 98%) and Al 2 (SO 4 ) 3 Mix at a molar ratio of 1:5:0.3:0.8 to make a suspension;
[0036] Step 2: Add the prepared suspension into the reaction kettle, place the reaction kettle in a microwave hydrothermal reactor for hydrothermal reaction, the reaction temperature is 160°C, the reaction time is 40min, the filling ratio of the reaction kettle is 0.5;
[0037]Step 3: Pour the liquid in the reactor after the microwave hydrothermal reaction into an evaporating dish, and place the evaporating dish in an oven for drying; the drying temperature is 70°C, and the drying time is 6 hours;
[0038] Step 4: Put the dried product in a muffle furnace for molten salt reaction, and the reacted product is ground, washed with water, and centrifuged to remove the molten salt adsorbed on the surface, and the obtained product is mullite whisker. Wherein, the molten salt reaction temperature is 600° C., and the reaction ti...
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