| Five special properties of our kyanite: |
| 1.stable properties |
| 2.Expansion property is good as its Al2O3 comes from kyanite and swell capacity increases with increasing Al2O3 content |
| 3.The lower swelling temperature,and with increasing temperature it has stable swelling curve and obvious tendency |
| 4.Lower impurity such as K2O&Na2O,without topaz phase and mica phase |
| 5.be in light blue color and competitive price |
