CAJ | 학술논문

以粒度为3～1和≤1 mm的板状刚玉为骨料，板状刚玉细粉、α-Al2 O3微粉和Si粉为细粉，分别添加质量分数为3％的六方氮化硼、3％和10％的鳞片石墨制备了Al2 O3－BN和低碳、高碳Al2 O3－C三种试样，并对比了其常温物理性能、高温强度、抗氧化性、抗热震性和抗渣侵蚀性。结果表明：1）Al2 O3－BN耐火材料的常温、高温物理性能与低碳铝碳材料相差不大，并优于传统高碳铝碳材料；2）Al2 O3－BN 耐火材料具有比碳复合耐火材料更好的抗热震性和抗氧化性，抗渣性与低碳铝碳材料的相当；3）考虑到材料的整体性能，六方氮化硼可以替代石墨作为原料，用于制备综合性能优异的氧化铝质复合耐火材料。
이립도위3～1화≤1 mm적판상강옥위골료，판상강옥세분、α-Al2 O3미분화Si분위세분，분별첨가질량분수위3％적륙방담화붕、3％화10％적린편석묵제비료Al2 O3－BN화저탄、고탄Al2 O3－C삼충시양，병대비료기상온물이성능、고온강도、항양화성、항열진성화항사침식성。결과표명：1）Al2 O3－BN내화재료적상온、고온물이성능여저탄려탄재료상차불대，병우우전통고탄려탄재료；2）Al2 O3－BN 내화재료구유비탄복합내화재료경호적항열진성화항양화성，항사성여저탄려탄재료적상당；3）고필도재료적정체성능，륙방담화붕가이체대석묵작위원료，용우제비종합성능우이적양화려질복합내화재료。
The specimens of Al2O3-BN,low carbon Al2O3-C,and high carbon Al2O3-C were prepared using tabular alumina of 3 -1 and ≤1 mm as aggregate,tabular alumina powder,α-Al2O3 micropowder,and Si powder as matrix,adding 3%hexagonal boron nitride,3%flake graphite or 10%flake graphite in mass,re-spectively.The cold physical properties,hot strength,oxidation resistance,thermal shock resistance and slag corrosion resistance of the specimens were compared.The results show that:(1)cold and hot physi-cal properties of the Al2O3-BN refractories are slightly different compared with those of the low carbon Al2O3-C refractories,but better than those of the traditional high carbon Al2O3-C refractories;(2)Al2O3-BN refractories have better thermal shock resistance and oxidation resistance,and similar slag corrosion resist-ance compared with the Al2O3-C refractories;(3)hexagonal boron nitride can replace flake graphite as a starting material for the preparation of alumina based composite refractories.