Effect of TiO2 addition on microstructure and strength of porous spinel (MgAl2O4) ceramics prepared from magnesite and Al(OH)3
Effect of TiO2 addition on microstructure and strength of porous spinel (MgAl2O4) ceramics prepared from magnesite and Al(OH)3
复制标题
添加TiO2对菱镁矿和Al(OH)3制备多孔尖晶石(MgAl2O4)陶瓷微观结构和强度的影响
DOI：
10.1016/j.jallcom.2014.08.169
复制
发表时间：
2015-01
影响因子：
6.2
通讯作者：
Han, Bingqiang
中科院分区：
文献类型：
--
作者：
Chen, Junfeng;Li, Nan;Wei, Yaowu;Han, Bingqiang
以菱镁矿和Al(OH)3为原料，添加TiO2，通过原位分解成孔技术制备了多孔尖晶石(MgAl2O4)陶瓷。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)和水银孔隙率测量等手段对多孔陶瓷进行了表征。研究了TiO2添加对物相组成、孔隙表征和强度的影响。结果表明，TiO2的添加量（ATA）影响烧结温度下液相的形成，改变孔隙率、孔径分布和颈键，从而影响多孔陶瓷的强度。随着ATA的增加，烧结温度下的液体含量增加，颈键发育得更好，孔隙率降低，平均孔径和强度增加。优化后的产品为ATA含量为1.5%的试件，其显气孔率高（53.0%），平均孔径小（5.95μm），抗压强度高（21.2MPa），弯曲强度高（8.5MPa），孔径分布相对均匀。
Porous spinel (MgAl2O4) ceramics were prepared from magnesite and Al(OH)3with TiO2addition through an in-situ decomposition pore-forming technique. The porous ceramics were characterized through X-ray diffractometer (XRD), scanning electron microscopy (SEM), and mercury porosimetry measurements, etc. The effect of TiO2addition on the phase compositions, pore characterizations and strengths was investigated. The results showed that the amount of TiO2added (ATA) affected the formation of liquid phase at sintering temperature, changed the porosity, the pore size distribution and the neck bonds, thus affecting the strength of the porous ceramics. With an increase in ATA, the liquid content at sintering temperature increased, the neck bonds developed better, the porosity decreased, and the average pore size and strength increased. The optimized product is a specimen with 1.5 wt% ATA which has a high apparent porosity (53.0%), a small average pore size (5.95 μm), a high compressive strength (21.2 MPa), a high flexural strength (8.5 MPa) and a relatively homogeneous pore size distribution.
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影响因子：
5.2
作者：
Naghizadeh, R.;Rezaie, H. R.;Golestani-Fard, F.
通讯作者：
Golestani-Fard, F.
影响因子：
5.2
作者：
Sarkar, R;Das, SK;Banerjee, G
通讯作者：
Banerjee, G
影响因子：
5.2
作者：
I. Ganesh
通讯作者：
I. Ganesh
影响因子：
6.2
作者：
Taehyung Kim;Donghyun Kim;Shinhoo Kang
通讯作者：
Taehyung Kim;Donghyun Kim;Shinhoo Kang
DOI：
--
发表时间：
1972
期刊：
--
影响因子：
--
作者：
Kenneth Shaw
通讯作者：
Kenneth Shaw