Microwave drying drying nanomaterials
    Microwave drying is a direct drying method , a direct drying method is the liquid phase precipitate obtained directly ( or simply filtered after washing ) using conventional drying or high temperature calcination product obtained nanomaterials method of operation .
    Microwave is the wavelength of 0.001-1m, a frequency of 3-3000MHz, with penetration of the electromagnetic waves. The microwaves generated by the magnetron microwave generator , transported through the waveguide to the microwave dryer , the material under the action of microwave heating dehumidification drying . With conventional heating and drying different traditional heating and drying heat is transmitted to the interior appearance of the material , while the microwave drying is the material to be dried inside the microwave electromagnetic radiation to promote its dipole motion , so that mutual collisions, friction heat . This drying method has been currently used in the preparation of titanium dioxide, aluminum oxide, orange, silica nanoparticles .
    Conventional heating and drying , microwave drying has the following characteristics .
    ① heating speed . Only conventional heating and drying method 1/100-1/10 of time to be completed.
    ⑨ uniform heating . Microwave heating temperature gradient exists no field , high thermal efficiency .
    ③ control sensitivity . Normal operation of the boot a few minutes to adjust the output power of microwave heating Qian conditions without changing the inert heat after shutdown no lag .