鎂磚廠家的荷重軟化溫度(du)比耐火度(du)低得多，約為(wei)1500℃。原因在于熱膨脹性(xing)和熱震穩定(ding)性(xing)

鎂(mei)磚(zhuan)(zhuan)的(de)(de)(de)熱(re)(re)(re)膨(peng)脹性(xing)(xing)(xing)(xing)較(jiao)(jiao)大，而(er)且線膨(peng)脹系數(shu)隨溫(wen)度(du)(du)(du)升高而(er)增(zeng)大。鎂(mei)磚(zhuan)(zhuan)的(de)(de)(de)熱(re)(re)(re)震穩定(ding)性(xing)(xing)(xing)(xing)較(jiao)(jiao)差(cha)，水冷次(ci)數(shu)僅為(wei)2~3次(ci)。原因是熱(re)(re)(re)膨(peng)脹系數(shu)大而(er)導(dao)溫(wen)性(xing)(xing)(xing)(xing)較(jiao)(jiao)差(cha)，在(zai)(zai)溫(wen)度(du)(du)(du)發生(sheng)急變(bian)(bian)(bian)時(shi)(shi)易產(chan)生(sheng)較(jiao)(jiao)大的(de)(de)(de)熱(re)(re)(re)應(ying)力(li)(li)(li)；基質中CMS有各向異(yi)性(xing)(xing)(xing)(xing)，在(zai)(zai)溫(wen)度(du)(du)(du)急變(bian)(bian)(bian)時(shi)(shi)，因各向膨(peng)脹差(cha)異(yi)而(er)加(jia)劇了熱(re)(re)(re)應(ying)力(li)(li)(li)的(de)(de)(de)產(chan)生(sheng)，方鎂(mei)石(shi)對鐵(tie)酸(suan)鎂(mei)的(de)(de)(de)溶解度(du)(du)(du)隨溫(wen)度(du)(du)(du)變(bian)(bian)(bian)化(hua)而(er)變(bian)(bian)(bian)化(hua)，鐵(tie)酸(suan)鎂(mei)的(de)(de)(de)融入和析出也(ye)導(dao)致內應(ying)力(li)(li)(li)的(de)(de)(de)產(chan)生(sheng)；鎂(mei)磚(zhuan)(zhuan)的(de)(de)(de)彈性(xing)(xing)(xing)(xing)模量較(jiao)(jiao)高，對于(yu)應(ying)力(li)(li)(li)的(de)(de)(de)緩沖能力(li)(li)(li)較(jiao)(jiao)弱。所(suo)以，易膨(peng)脹和易崩(beng)裂，即熱(re)(re)(re)膨(peng)脹性(xing)(xing)(xing)(xing)大而(er)熱(re)(re)(re)震穩定(ding)性(xing)(xing)(xing)(xing)差(cha)。基質中存在(zai)(zai)多種化(hua)合物(wu)和共熔(rong)(rong)(rong)(rong)化(hua)合物(wu)，這些共熔(rong)(rong)(rong)(rong)化(hua)合物(wu)熔(rong)(rong)(rong)(rong)點(dian)(dian)較(jiao)(jiao)低，如MF-CMS的(de)(de)(de)共熔(rong)(rong)(rong)(rong)點(dian)(dian)為(wei)1430℃.CMS的(de)(de)(de)共熔(rong)(rong)(rong)(rong)點(dian)(dian)為(wei)1330℃。同時(shi)(shi)，低熔(rong)(rong)(rong)(rong)點(dian)(dian)的(de)(de)(de)共熔(rong)(rong)(rong)(rong)化(hua)合物(wu)均勻分(fen)布包圍著方鎂(mei)石(shi)顆(ke)粒(li)，使顆(ke)粒(li)之(zhi)間不能形成骨架，當(dang)溫(wen)度(du)(du)(du)升高時(shi)(shi)，低熔(rong)(rong)(rong)(rong)點(dian)(dian)共熔(rong)(rong)(rong)(rong)化(hua)合物(wu)熔(rong)(rong)(rong)(rong)化(hua)而(er)導(dao)致鎂(mei)磚(zhuan)(zhuan)軟(ruan)化(hua)變(bian)(bian)(bian)形，所(suo)以，鎂(mei)磚(zhuan)(zhuan)的(de)(de)(de)荷重軟(ruan)化(hua)溫(wen)度(du)(du)(du)低。耐(nai)火度(du)(du)(du)高而(er)荷重軟(ruan)化(hua)溫(wen)度(du)(du)(du)低是鎂(mei)磚(zhuan)(zhuan)的(de)(de)(de)另一(yi)顯(xian)著特點(dian)(dian)。

鎂磚廠家

耐火度

方鎂石的熔點高達2800℃.所以(yi)鎂磚的耐火度也很高，一(yi)般(ban)可達2000℃以(yi)上。

中(zhong)(zhong)間包(bao)(bao)干濕料，中(zhong)(zhong)間包(bao)(bao)涂抹料，中(zhong)(zhong)間包(bao)(bao)擋(dang)渣墻(qiang)，鎂(mei)磚(zhuan)廠(chang)家(jia)

導熱性與導溫性

鎂砂廠家，鎂磚廠家，不(bu)定型耐火(huo)材料(liao)，就到(dao)海城天(tian)興耐火(huo)，包括(kuo)中間(jian)包干(gan)濕料(liao)，中間(jian)包涂抹(mo)料(liao)，中間(jian)包擋渣(zha)墻，

鎂(mei)(mei)磚的熱(re)導(dao)性較好(hao)，但熱(re)導(dao)率(lv)隨溫(wen)度升高(gao)而(er)顯(xian)著降低。由于鎂(mei)(mei)磚的熱(re)容和(he)體積密度大，雖然熱(re)導(dao)率(lv)大而(er)導(dao)溫(wen)性卻差，即溫(wen)度的變化速度較慢。導(dao)熱(re)性好(hao)而(er)導(dao)溫(wen)性差是鎂(mei)(mei)磚的又一顯(xian)著特點。