1. The Aluminised Heat Barrier is made up of woven silica with a flexible Aluminised finish

2. There is a billet tunnel in the straightening region, which is made of water cooled heat barrier plates.

3. Presents the concept of heat barrier, and analyses its formation and some characteristics including irregular shape, dynamic changes and potential harmfulness.

4. The radiant heat barrier layer absorbs radiant heat emitted by a polysilicon rod heated in a CVD process, and re-radiates the absorbed heat (which heats the radiant heat barrier layer to a temperature of 400 ̊C or higher) toward the polysilicon rod and both sides of the cooling walls, in order to shield the cooling walls from heat.