
Blue nano tungsten oxide for near infrared shielding material may be prepared by using ammonium paratungstate as a raw material. During preparation, the APT raw material is placed on the feed hopper of the feed port. The APT slides down along the inverted cone of the feed hopper and enters the feed pipe. Push the feed tube along the feed tube under the push of the feed screw in the feed tube. Since the furnace tube can be rotatably installed…