熔融石英预制件
产品规格
项目 | 指标 | |
Al2O3 % | ≤3 | |
SiO2 / % | ≥95 | |
CaO / % | ≤3 | |
残余石英 / % | ≤10 | |
体积密度 (kg/m3) | as received | ≥1800 |
after 1300℃ / 5 hours | ≥1850 | |
真密度 /（kg/m3） | as received | ≤2100 |
after 1300℃ / 5 hours | ≤2350 | |
显气孔率 / % | as received | Avg. ＜18 |
after 1300℃ / 5 hours | Avg. ＜20 | |
常温耐压强度 / MPa（N/mm2） | as received | ≥30 |
热膨胀率 / % | growth at 1300℃ | ≥0 |
between 0 and 300 hours | ≤0.2 | |
蠕变率 | 1500℃ / 20-50 N/mm2 | ≤0.2 |
导热系数 1100℃ W/m.k | 250℃ | ≥1.1 |
1000℃ | ≥2.0 | |