理化指标 ? ???项目???????????????????牌号??? HL-16 HL-17 HL-18 HL-14 HL-12 HL-19 较高使用温度℃ 1700 1700 1750 1400 1200 1100 体积密度 kg/cm3? 110℃x24h ≥2800 ≤1750 ≥3000 ≥2400 ≤1200 ≤950 化学成分% Al2O3?≤ 93 93 95 60 — — SiO2?% ≤ 0.5 0.5 0.5 — — — Fe2O3≤ 0.7 0.7 0.7 — — — CaO≤ 5 5 4 — — — 耐压强度≥ 110℃x24h 80 15 80 60 8 3 1000℃x24h 80 — 80 60 5 2.5 1200℃x24h 80 12 80 — — — 抗折强度≥ 110℃x24h 8 3 8 7 3 1.5 1000℃x24h 8 — 8 7 2 1 1200℃x24h 8 2 8 7 — — 烧后线变化率 % ≤ (1400℃x3h0.4(1400℃x3h)0.3 (1500℃x3h)0.5 (1300℃x3h)0.4 (800℃x3h)0.15 (900℃x3h)0.4 导热系数 W/m.K ≤ — (800℃)0.7 — — (500℃)0.28 (500℃)0.26