8868体育

Overview of sapphire furnace
α - Al2O3 single crystal is also called sapphire, commonly known as corundum, is a simple coordination type oxide crystal. It is made up by proces alumina powder with purity ov 99.99 %, and its growth process is in ultra-high temp. furnace, which is called sapphire furnace according to its application, and is divide into sapphire growth furnace and sapphire annealing furnace according to its use temp., also called crystal growth furnace and crystal annealing furnace. 
Both that crystal growth furnace and the anneal furnace are small in size.

Heat insulation structure of sapphire long crystal furnace and anneal furnace
High temperature insulation materials for sapphire furnaces;
Crystal growth furnace: 2100 ℃ ~ 2250 ℃, the furnace adopts zirconia refractory brick + alumina fibreboard backing. 
Crystal annealing furnace: 1500 ℃ ~ 1800 ℃, the furnace adopts zirconia plate or alumina plate + zirconium containing ceramic fiber board multilayer composite, and matching binder.

Technical advantage
Advantages of application of refractory fibreboard in sapphire furnace;
Advantages of sapphire furnace after application of fibreboard: taking the sapphire annealing furnace with the working temperature of 1600 degrees and the volume of 1l as an example, the furnace adopts zirconia fibreboard + alumina fibreboard multilayer composite lightweight fiber material, which reduces the weight by 2 / 3 compared with the traditional muffle furnace; Has the advantages of small volume, light weight, mobile and portable, excellent performance, exquisite and beautiful appearance, heat preservation and energy conservation and the like.