本文選題：含碳耐火材料　切入點(diǎn)：結(jié)合相　出處：《耐火材料》2017年03期

【摘要】：含碳耐火材料在高溫下會(huì)發(fā)生酚醛樹脂結(jié)合劑炭化和氧化物的還原反應(yīng),從而生成含碳?xì)庀嗷騺喎€(wěn)態(tài)氧化物氣相,通過(guò)高溫原位催化技術(shù),可有效實(shí)現(xiàn)這些氣相成分沉積生長(zhǎng),促進(jìn)一維或二維結(jié)合相的原位生成,從而顯著改善含碳耐火材料特別是低碳材料的強(qiáng)度和韌性。研究發(fā)現(xiàn):1)酚醛樹脂在高溫下可形成碳納米管結(jié)構(gòu),其氧化峰值溫度可從506℃提高到664.6℃;2)MgO-C耐火材料中可原位形成一維MgO晶須或MgAl_2O_4晶須,其常溫抗折強(qiáng)度、常溫耐壓強(qiáng)度、斷裂位移量和經(jīng)1100℃■水冷熱震循環(huán)2次后殘余耐壓強(qiáng)度分別提高66%、47%、13%和26%;3)Al_2O_3-C耐火材料中可原位形成二維片狀β-SiAlON陣列結(jié)構(gòu),而二維陣列結(jié)合相的生成,可將材料強(qiáng)度提高60%以上,1100℃■水冷熱震循環(huán)2次后殘余耐壓強(qiáng)度僅降低4.5MPa。可見(jiàn),含碳耐火材料中一維或二維結(jié)合相的高溫原位生成,可顯著改善含碳耐火材料的綜合物理性能,是耐火材料低碳化增強(qiáng)和增韌的發(fā)展方向。
[Abstract]:Carbonization of phenolic resin binders and reduction of oxides will take place in carbon-containing refractories at high temperature, thus forming carbon-containing gas phase or metastable oxide gas phase, which can be effectively deposited and grown by high-temperature in-situ catalytic technology. The in-situ formation of one-dimensional or two-dimensional bonding phase was promoted, which significantly improved the strength and toughness of carbon-containing refractories, especially low carbon materials. It was found that the phenolic resin can form carbon nanotube structure at high temperature. The oxidation peak temperature can be raised from 506 鈩，

本文編號(hào)：1665790