机械工程材料
MATERIALS FOR MECHANICAL ENGNEERING
2015年2月第39卷第2期Vol39No,2Feb,2015
Zr(OH)4添加量对Al,O3-MgO浇注料基质
显微结构和阻力系数的影响
邹阳，顾华志，黄奥，张美杰，吉超
（武汉科技大学省部共建耐火材料与冶金国家重点实验室，武汉430081)
摘要：采用板状刚玉、白刚玉细粉、电熔镁砂、α-AlzO：微粉等为原料，以铝硅凝胶粉为结合剂，制备了AlO-MgO浇注料，并浇注成型后于1600CX3h烧结；研究了Zr(OH)添加量对 Al.O;-MgO浇注料基质烧结性能、显微结构的影响，并引入多孔介质模型，探讨了基质阻力系数的变化规律。结果表明：适量Zr(OH)。能增大Al.O,-MgO浇注料基质的体积密度，降低显气孔率，缩小平均孔径，增大基质的粘性阻力系数;Zr(OH)4添加量为0.5%（质量分数)时，基质具有较佳的烧结性能（显气孔率24.5%，体积密度2.56g·cm-3），较小的平均孔径（1.71um)且孔径分布均匀；Al,O,-MgO浇注料基质平均孔径对其粘性阻力系数的影响较显气孔率的影响更大。
关键调：耐火材料；Zr(OH)4t显微结构；阻力系数；孔径
中图分类号：TQ175.1
文献标志码：A
文章编号：1000-3738(2015)02-0077-04
Effects of Zr(OH)+Addition Amounton Microstructure and ResistanceCoefficientsofAl,O-MgOCastableMatrix
ZOU Yang,GU Hua-zhi,HUANG Ao,ZHANG Mei-jie,JI Chao
(State Key Lab of Refractories &. Metallurgy, Wuhan University of
Science &, Technology, Wuhan 430081, China)
Abstract; Al, O,-MgO castables were prepared using tabular corundum, white corundum powders, α-Al, O, micropowders and fused magnesia powders as raw materials, using Al, O,-SiO; gel powders as binding agent, The castables were cast and then sintered at 1 600 C for 3 hours, The effects of Zr(OH), content on the sintering
characteristics, microstructure of Al O,-MgO castable matrix
ere investigated.The porous media model was
adopted to describe both the viscous resistance coefficient and the inertial resistance coefficient. Results show an
increase in bulk density and viscous resistance
coefficier
arent porosity and averagepore size
were found in Al, O,-MgO castable matrix added applicable Zr(OH),. When Zr(OH), content was 0. 5wt%, the
matrix had good sintering characteristics (bulk densit
yof 2.56
average pore-size (1. 71 μm) and hon
n3 and apparent porosity of 24, 5%), smal
is distribution of pore-size.The average pore size of matrix wasmore
crucial than the apparent porosity for the viscc
esista
ce coefficient of the Al, O,-MgO castables
Key words: refractory ; Zr(OH),; microstructure ; resistance coefficient ; pore-size
0引言
随着钢铁等高耗能工业节能降耗要求的提高，收稿日期：2013-12-23；修订日期：2014-12-06
基金项目：国家自然科学基金资助项日(51204126)；潮北省自然科学
基金重点资助项目(2011CDA053)
作者简介：邹阳（1989一），男，潮北黄石人，硕士研究生，
导师：顾华志教投万方数据
轻量化成为了耐火材料的重要研究方向之一[1-3}，随之产生的突出问题是抗渣侵蚀性能能否得到保证。基质是决定耐火材料，尤其是轻质耐火材料抗渣侵蚀性能的关键。钢包在服役过程中，炉渣及钢液首先通过基质中的裂纹或气孔渗透到材料内部，并与基质反应形成低熔点物相，改变材料的组织，进而产生较大裂纹直至形成剥落}。因此，提高基质的抗渗透性，改善基质的显微结构是提高轻质耐火
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