輕(qing)(qing)質(zhi)黏(nian)土磚(zhuan)系指(zhi)含AL2O3—46%的輕(qing)(qing)質(zhi)耐(nai)火制品,以黏(nian)土熟料(liao)(liao)或(huo)(huo)輕(qing)(qing)質(zhi)熟料(liao)(liao)和(he)(he)可塑黏(nian)土為(wei)主(zhu)要(yao)原料(liao)(liao),配料(liao)(liao)與(yu)水混(hun)合制成(cheng)可塑料(liao)(liao)或(huo)(huo)泥漿,以擠壓成(cheng)型(xing)(xing)或(huo)(huo)澆注(zhu)成(cheng)型(xing)(xing),干(gan)燥后于(yu)1250—1350℃氧化氣氛(fen)中(zhong)燒成(cheng)。常用(yong)(yong)輕(qing)(qing)質(zhi)黏(nian)土磚(zhuan)的體(ti)積(ji)密(mi)度(du)(du)為(wei)0.75-1.20g/cm3耐(nai)壓強度(du)(du)為(wei)2.0-5.9MPa,熱(re)導(dao)率為(wei)0.221-0.442W/(m.K)(1350℃)。輕(qing)(qing)質(zhi)黏(nian)土保(bao)溫磚(zhuan)的用(yong)(yong)途廣泛,主(zhu)要(yao)用(yong)(yong)于(yu)各種工業窯爐中(zhong)不接觸熔融物和(he)(he)無侵蝕氣體(ti)作用(yong)(yong)的隔熱(re)層材料(liao)(liao), 使用(yong)(yong)溫度(du)(du)1200-1400℃。我國(guo)標(biao)注(zhu)(GB3994—1983)按體(ti)積(ji)密(mi)度(du)(du)分(fen)為(wei)NG-1.5,NG-1.3a,NG-1.3b等(deng)十種牌號