High-efficiency and energy-saving potassium titanate whisker preparation method

[0027] Example 1

[0028] After weighing the titanium dioxide source and potassium source potassium oxide at a molar ratio of 1:1, mechanically grind until the system is uniform to obtain the precursor required for preparing the whiskers; place the precursor in the crucible at 35°C, and preheat The time is 5 hours; the preheated precursor is calcined in a continuous rotary calcining kiln at a temperature of 800℃, and the calcination time is 5 hours; after high-temperature calcination, it is crushed by a machine and placed at a humidity of 100% and a temperature of 100℃ In the moisture absorption deweaving kiln for 24 hours, potassium dititanate is obtained; the potassium dititanate is neutralized by a quantitative pickling device to complete the quantitative conversion of potassium ions, and filtered to obtain titanium with different compositions Potassium titanate whiskers: The obtained potassium titanate whiskers are subjected to high-temperature shaping treatment in a shaping kiln. The temperature of the shaping kiln is 500°C and the shaping time is 5 hours. A pure white needle-like potassium hexatitanate whisker product can be obtained. The length of this potassium titanate whisker is 40-50μm and the width is 12-15μm.

[0029] Example 2

[0030] After the titanium source metatitanic acid and potassium source potassium hydroxide are weighed in a ratio of 1:6 molar ratio of titanium to potassium atoms, they are mechanically ground until the system is uniform to obtain the precursor required for preparing whiskers; In a crucible at 500°C, the preheating time is 0.1 hour; the preheated precursor is put into a continuous rotary calcining kiln for calcination at a temperature of 1300°C, and the calcination time is 0.5 hours; after high-temperature calcination, the machine is crushed to absorb moisture and dewoven The moisture absorption and deweaving time is 2 hours, the humidity is 70%, and the temperature is 400°C. After the calcined product is crushed by a machine, it is put into a constant temperature and humidity hygroscopic hydrolysis kiln for hygroscopic hydrolysis to obtain potassium dititanate; the potassium dititanate is neutralized by a quantitative pickling device to complete the quantification of potassium ions After conversion, filtration and drying, different potassium titanate whiskers can be obtained; the obtained potassium titanate whiskers are subjected to high-temperature shaping treatment in a shaping kiln. The temperature of the shaping kiln is 1000°C and the shaping time is 0.5 hours. A pure white potassium tetratitanate layered whisker product can be obtained. The length of the potassium titanate whisker is 90-100 μm and the width is 30-40 μm.

[0031] Example 3

[0032] After weighing the titanium dioxide source and potassium source potassium carbonate at a molar ratio of 1:4, mechanically grind until the system is uniform to obtain the precursor required for preparing whiskers; place the precursor in a crucible at 300°C and preheat The time is 3 hours; the preheated precursor is calcined in a continuous rotary calcining kiln at a temperature of 800℃, and the calcining time is 5 hours; after high-temperature sintering and high-temperature calcination, the machine crushes, absorbs moisture, deweaves, and absorbs moisture. The time is 4 hours, the humidity is 90%, and the temperature is 300°C. After the calcined product is crushed by a machine, it is put into a constant temperature and humidity hygroscopic hydrolysis kiln for hygroscopic hydrolysis to obtain potassium dititanate; the potassium dititanate is neutralized by a quantitative pickling device to complete the quantification of potassium ions After conversion, filtration and drying, different potassium titanate whiskers can be obtained; the obtained potassium titanate whiskers are subjected to high-temperature shaping treatment in a shaping kiln. The temperature of the shaping kiln is 600°C and the shaping time is 4 hours. A pure white potassium octatitanate whisker product can be obtained. The potassium titanate whisker has a length of 60-80 μm and a width of 10-15 μm.