摘要
为实现铜渣还原尾渣的高附加值利用,本文参照铜渣还原尾渣的主要成分,使用化学纯试剂配制原料,采用熔融法制备微晶玻璃,探究了添加剂CaF_(2)对微晶玻璃的析晶和物理性能的影响规律。结果表明,随着CaF_(2)的含量增加,微晶玻璃的析晶活化能呈现先减小而后增大的趋势,当CaF_(2)含量为2%时,析晶活化能最低。适量添加CaF_(2)对微晶玻璃的析晶有一定的促进作用,当CaF_(2)添加量达到6%时则会抑制微晶玻璃析晶。当CaF_(2)含量分别为0、2%或6%时,微晶玻璃呈现表面析晶。当CaF_(2)含量为4%时,微晶玻璃呈现整体析晶。当CaF_(2)含量为0或2%时,微晶玻璃中的主要晶相为钙长石相和钙铝黄长石相。当CaF_(2)含量为4%或6%时,微晶玻璃中有枪晶石相析出。当CaF_(2)添加量为2%时,微晶玻璃的物理性能最佳,其体积密度为2.78 g/cm^(3),吸水率为0.63%,显微硬度为7.99 GPa(814.90HV),抗弯强度为198.27 MPa。
To achieve high-value utilization of copper slag reduction tailings,raw materials for glass-ceramics were prepared by using chemically pure reagents based on the main components of copper slag reduction tailings.Glass-ceramics were synthesized via the melting method to investigate the influence of the additive CaF_(2) on the crystallization behavior and physical properties of the glass-ceramics.The results demonstrate that as the CaF_(2) content increases,the crystallization activation energy of the glass-ceramics initially decreases and then increases,reaching its minimum value at a CaF_(2) content of 2%.The addition of an appropriate amount of CaF_(2) promotes crystallization,whereas a CaF_(2) content of 6%inhibits the crystallization process.Surface crystallization is observed in the glass-ceramics when the CaF_(2) content is 0,2%,or 6%,while bulk crystallization occurs at a CaF_(2) content of 4%.The main crystalline phases identified in the glass-ceramics are anorthite and gehlenite at CaF_(2) contents of 0 and 2%,whereas the cuspidine phase precipitates at CaF_(2) contents of 4%and 6%.The optimal physical properties of the glass-ceramics are achieved at a CaF_(2) content of 2%,with a bulk density of 2.78 g/cm^(3),water absorption of 0.63%,microhardness of 7.99 GPa(814.90HV),and bending strength of 198.27 MPa.
作者
李赟杰
侯阳来
马国军
罗彦恒
徐菊
LI Yunjie;HOU Yanglai;MA Guojun;LUO Yanheng;XU Ju(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology,Wuhan 430081,China;College of Science,Wuhan University of Science and Technology,Wuhan 430065,China)
出处
《武汉科技大学学报》
北大核心
2025年第2期143-151,共9页
Journal of Wuhan University of Science and Technology
基金
国家自然科学基金钢铁联合研究基金项目(U1960108).
