Transparent heat-shielding microparticles, microparticle dispersion, its preparation method and use
A micro-particle, transparent technology, applied in rayon manufacturing, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve problems such as unstable optical performance, and achieve the effect of stable performance
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Embodiment 1
[0093] 0.652kg of cesium carbonate and 3.132kg of ammonium paratungstate are mixed and put into a rotary heating furnace with a volume of 50L, the furnace door is closed, and ammonia gas is introduced after being evacuated by a vacuum unit to keep its flow rate at 100 SCCM (standard milliliters per minute), and Keep a certain vacuum state during the whole synthesis process; turn on the furnace rotary device, raise the temperature from room temperature to 750°C within 2 hours, and keep it at this temperature for 4 hours; stop heating, and the furnace temperature will be naturally cooled to around room temperature; open the rotary furnace door to go out material to obtain the desired cesium tungsten bronze powder.
[0094] Determined by powder XRD, the obtained powder has a single-phase cesium tungsten bronze crystal structure ( figure 1 ). Through a more detailed comparative analysis of the XRD diffraction peaks, compared with the diffraction peaks of the theoretical ratio of ...
Embodiment 2
[0103] 0.325kg cesium carbonate is completely dissolved in methanol to obtain cesium carbonate methanol solution; 1.391kg nanometer tungsten oxide (commercially available WO 3 , average particle size 50nm) into the solution, stirred and dried to obtain a cesium tungsten bronze precursor; the obtained cesium tungsten bronze precursor was added to a 50L rotary furnace, the furnace door was closed, and nitrogen was introduced after vacuuming with a vacuum unit Mix the gas with hydrogen (7:3), keep the total flow rate at 100SCCM, and keep the furnace at a certain vacuum degree during the whole synthesis process; turn on the furnace rotary device, and heat up from room temperature to 500°C within 2 hours. Heat preservation for 8 hours; stop heating, and cool the furnace temperature to around room temperature naturally; open the rotary furnace door to discharge the material, and obtain the nitrogen-doped cesium tungsten bronze powder.
[0104] Powder XRD analysis shows that the obta...
Embodiment 3
[0109] Mix 200 g of nitrogen-doped cesium tungsten bronze nano-powder obtained in Example 2 with 15 kg of plasticizer (3G8) uniformly with a stirrer, and gradually add the mixed liquid to 35 kg of PVB powder through a funnel and fully carry out the process in a horizontal mixer. After mixing, plasticize at a temperature of 160° C. by a twin-screw extruder, and obtain a PVB heat-shielding interlayer film (0.38mm×1m×100m) containing nitrogen-doped cesium tungsten bronze nanoparticles by extrusion molding.
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