| 摘要 |
PURPOSE: A composition of celiac crystallized glass is provided to improve the easy of preparing thereof, the lower of the melting temperature of source materials, the complete crystallization of monocelsian and the reduction of the amounts of energy used. CONSTITUTION: The desired compositions are characterized in that the SA2S is combined with the Al2O3, B2O3 and TiO2, in any their formulation ratios. In particulars, the SA2S is first formulated with 3 to 12 wt% of Al2O3, the resulting (SA2S-A) is combined with 2 to 5 wt% of B2O3, and to the resulting (SA2S-A)B is added 2 to 7 wt% of TiO2 to give the desired (SA2S-A)BT. Thereby, in some compositions generated from by formulating SrO-Al2O3-SiO2(i.e., SA2S) as one base compound, in order, with Al2O3(SA2S-A), B2O3((SA2S-A)B) and TiO2((SA2S-A)BT), especially the (SA2S-A)B and (SA2S-A)BT are found that their practical melting point and crystallizing peak temperature are remarkably lower than those of the conventional SA2S. In addition, approximately 100% pure monocelsian may be formed from the (SA2S-A)B and (SA2S-A)BT at 1100°C in only 1 hour.
|
