摘要
研究了α-Al2O3纳米复合高纯刚玉砖基质中的微粉、α-Al2O3纳米粉的加入量对基质流变性的影响,结合试样的烧后性能确定其基质的最佳颗粒组成。结果表明:随着α-Al2O3微粉加入量的增加,泥浆的粘度和剪切应力逐渐减小,当α-Al2O3微粉加入质量分数为14%时,粘度值最低,继续增加α-Al2O3微粉,泥浆的粘度和剪切应力逐渐升高;随着α-Al2O3纳米粉加入量的增加,泥浆的粘度和剪切应力逐渐增大。固定微粉含量,随着α-Al2O3纳米粉加入量的逐渐增加,刚玉砖的体积密度、常温抗折强度及高温抗折强度先增大后减小,当α-Al2O3纳米粉加入量为1%时,三者均达到最大值。综合以上研究,确定基质颗粒组成为:纳米粉含量为1%,微粉含量为8%,细粉为31%。
The effects of α-Al2O3 micro-powder and nano-powder additions on matrix rheologic behavior were studied. The optimum matrix granulometric composition was obtained based on the investigation of matrix rheologic behavior and the properties of α-Al2O3 nano-powder composite high purity corundum brick. The results show that the viscosity and shear stress of the slurry decrease and then increase with the addition of α-Al2O3 micro-powder increase. When the addition of α-Al2O3 micro-powder is 14wt%, the value of viscosity is the minimum. The viscosity and shear stress of the slurry increase with the addition of α-Al2O3 nano-powder increase. The bulk density, modulus of rupture and hot modulus ofrupture of high purity corundum brick increase and then decrease with the addition of α-Al2O3 nano-powder increase. When α-Al2O3 nano-powder addition is 1%, density and strength would reach their maximum values. The optimum matrix granulometric composition is 1% α-Al2O3 nano-powder, 8%α-Al2O3 micro-powder and 31% α-Al2O3 fine powder additions.
出处
《工业加热》
CAS
2007年第4期45-47,共3页
Industrial Heating
基金
河南省教育厅自然科学基金(2006430011)
河南省重点科技攻关项目(0523050800)
关键词
Α-AL2O3
纳米粉
高纯刚玉砖
流变性
基质颗粒组成
α-Al2O3 nano-powder
High purity corundum brick
Rheologic behavior
Matrix granulometric composition
