SiC浆料性能与多孔陶瓷烧结研究+文献综述
Study of the Properties of SiC Slurry and Sintering of Porous Ceramics
Abstract: The SiC reticulated ceramics can be used in the field of metallurgy, chemical
industry, environment protection, energy, biology, etc, owing to a series of excellent properties.
The SiC reticulated ceramics were prepared by impregnation with organic foam mesh. The
effects of the pH value, dispersing agents, rheology agents, and solid content on water-based
slurry flow, thixotropy and stability impact resistance were studied. Its mechanism of action
was analyzed. The results show that, the influence of pH value on the viscosity of the slurry is
most significant. When the pH value is about 10, the amount of dispersing agent 0.08%, solid
content 68.0wt.%, the flow ability and stability of the slurry were good. The slurry has a certain
thixotropy and it is suitable for once linked to pulp. SiC viscosity increases with the increasing
water-based slurry solids content, and decreases with increasing shear rate, and has significant
time dependence. Sintering process has an important influence on the performance of the
sample, firing temperature and holding time also has a great influence on the sintering. The
chemical composition of fired products varies with firing temperatures.
Keywords ：silicon carbide reticulated porous ceramics; technology of organic foam
impregnation process; properties of slurry; viscosity; sinter technique 目 录
1 文献综述 .. 1
1.1 多孔陶瓷 . 1
1.2 多孔陶瓷制备工艺 1
1.2.1 挤出成型工艺 . 2
1.2.2 发泡法 . 2
1.2.3 有机泡沫浸渍工艺 .. 3
1.2.4 添加造孔剂工艺 3
1.2.5 固态烧结法 .. 3
1.2.6 溶胶—凝胶工艺 3
1.2.7 冷冻干燥法 .. 4
1.2.8 多孔陶瓷水热-热静压工艺 . 4
1.2.9 快速自动成型 . 4
1.2.10 气相反应渗入法 . 4
1.3 碳化硅网眼多孔陶瓷的特性及应用 .. 4
1.4 有机泡沫浸渍工艺 6
1.4.1 有机泡沫浸渍工艺原理 6
1.4.2 有机泡沫体的选择 .. 8
1.4.3 陶瓷浆料的制备 8
1.4.4 浆料浸渍和挂浆工艺 . 9
1.4.5 干燥与烧成 .. 9
1.5 论文选题的目的与意义 .. 10
2 实验部分 11
2.1 实验原料 .. 11
2.2 实验设备 .. 11
2.3 实验步骤 .. 11
2.3.1 硅溶胶的制备 .. 11
2.3.2 SiC 陶瓷浆料的制备 . 12
2.3.3 泡沫的浸渍与挂浆 13
2.3.4 多孔陶瓷的烧结 . 13
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