Electroacoustic investigation of aqueous suspensions of raw materials for Al2O3-C refractories
Electroacoustic investigation of aqueous suspensions of raw materials for Al2O3-C refractories
复制标题
Al2O3-C耐火材料原料水悬浮液的电声研究
DOI：
10.1016/j.ceramint.2018.07.110
复制
发表时间：
2018
影响因子：
5.2
通讯作者：
C.G. Aneziris
中科院分区：
文献类型：
--
作者：
K. Moritz;N. Gerlach;G. Schmidt;C.G. Aneziris
通过测量电动力声波振幅（ESA），研究了pH值和阴离子聚电解质对不同碳键合氧化铝耐火材料zeta电位的影响。研究了氧化铝CT 3000 SG、板状氧化铝T60/T64、改性煤沥青Carbores®P、石墨AF 96/97、炭黑LUVOMAXX®MT N-991和RW微二氧化硅。这些材料的等电点被确定，除了石墨和微二氧化硅，在整个pH范围内（pH 3-11）表现出负的表面电位。阴离子聚电解质（Dolapix CA）不仅能提高氧化物在固有悬浮pH下的zeta电位值，还能提高石墨和炭黑的zeta电位值。将其添加到含有所研究原料混合物的浓缩浆料中，降低了粘度，并导致通过压力过滤产生的碳键合氧化铝样品的表观孔隙率降低。证明了该悬浮液成分适合于压滑铸造成型大尺寸样品，并证明了制备的铝碳复合耐火材料具有较高的抗热震性。
The influence of the pH value and of an anionic polyelectrolyte on the zeta potential of different raw materials that are used for producing carbon-bonded alumina refractories was studied by measurements of the electrokinetic sonic amplitude (ESA). The following raw materials were investigated: alumina CT 3000 SG, tabular alumina T60/T64, modified coal tar pitch Carbores®P, graphite AF 96/97, carbon black LUVOMAXX®MT N-991 and RW micro-silica. The isoelectric points of these materials were identified, except for the graphite and the micro-silica, which exhibited a negative surface potential over the entire pH range investigated (pH 3–11). An anionic polyelectrolyte (Dolapix CA) was found to increase not only the value of the zeta potential of the oxides at the inherent suspension pH but also that of the graphite and the carbon black. Its addition to concentrated slurries containing a mixture of the investigated raw materials reduced the viscosity and resulted in a decrease in the apparent porosity of carbon-bonded alumina samples produced by pressure filtration. The suitability of the suspension composition for shaping large-sized samples by pressure slip casting and the high thermal shock resistance of the fabricated alumina-carbon refractory have been demonstrated.
登录
查看更多内容
影响因子：
15.6
作者：
Greenwood, R
通讯作者：
Greenwood, R
碳粘结氧化铝喷嘴上的氧化铝涂层，用于钢熔体的主动过滤
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
C. Aneziris;S. Dudczig;J. Hubálková;M. Emmel;G. Schmidt
通讯作者：
G. Schmidt
通过电声测量进行 α-氧化铝-H2O 界面分析☆
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
Anna Luisa Costa;C. Galassi;Richard Greenwood
通讯作者：
Richard Greenwood
影响因子：
5.2
作者：
S. Schafföner;C. Aneziris
通讯作者：
S. Schafföner;C. Aneziris
影响因子：
3.6
作者：
U. Klippel;C. Aneziris;Annika J. Metzger
通讯作者：
Annika J. Metzger