CAJ | 학술논문

在以电熔镁砂和鳞片石墨为主原料，热固性酚醛树脂为结合剂制备的MgO-C材料中，为了避免酚醛树脂炭化后产生的碳脆性大、石墨化难且抗氧化性差等不足，研究了单独添加2％（w）的球状Ni粉以及同时添加2％（w）的球状Ni粉和7．5％（w）的Al粉对MgO-C材料基质中次生碳显微结构的影响。结果表明：添加球状Ni粉的酚醛树脂炭化后有大量的碳晶须生成；仅添加球状Ni粉的MgO-C试样经不同温度热处理后，生成的物相均以碳微球的形式存在，随着热处理温度的升高，碳微球变化并不明显；同时添加Al粉和球状Ni粉的MgO-C试样经1000℃热处理后开始有碳晶须生成，碳晶须的直径约0．4～0．5μm，长度3～4μm，随着热处理温度的升高，碳晶须的生成量逐渐增加。
재이전용미사화린편석묵위주원료，열고성분철수지위결합제제비적MgO-C재료중，위료피면분철수지탄화후산생적탄취성대、석묵화난차항양화성차등불족，연구료단독첨가2％（w）적구상Ni분이급동시첨가2％（w）적구상Ni분화7．5％（w）적Al분대MgO-C재료기질중차생탄현미결구적영향。결과표명：첨가구상Ni분적분철수지탄화후유대량적탄정수생성；부첨가구상Ni분적MgO-C시양경불동온도열처리후，생성적물상균이탄미구적형식존재，수착열처리온도적승고，탄미구변화병불명현；동시첨가Al분화구상Ni분적MgO-C시양경1000℃열처리후개시유탄정수생성，탄정수적직경약0．4～0．5μm，장도3～4μm，수착열처리온도적승고，탄정수적생성량축점증가。
In order to tackle the shortcomings of high brittleness,hard graphitization,and poor oxidation re-sistance resulted from carbonization of phenolic resin of MgO-C refractories,effects of 2 mass%spherical Ni,and 2 mass% spherical Ni plus 7.5 mass% Al composite powder on microstructure of the secondary carbon in MgO-C refractories matrix were investigated.The results show that a large numbers of carbon whiskers form after the carbonization of phenolic resin with Ni powder;in the MgO-C refractories matrix with only Ni powder,the carbon microspheres form at all treatment temperatures and change slightly with temperature rising;the carbon whiskers begin to generate in the specimens with composite powder at 1 000℃,the diameter of carbon whiskers is about 0.4-0.5 μm,and the length is about 3-4μm,and the formation amount of carbon whiskers increases gradually with temperature rising.