Preparation and properties of a new porous ceramic material used in clean energy field

doi:10.1016/j.jmst.2019.03.038

J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (7): 1255-1260.DOI: 10.1016/j.jmst.2019.03.038

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Preparation and properties of a new porous ceramic material used in clean energy field

Shuming Wang^a^*(), Xiaofang Zhang^a, Fenghua Kuang^b, Jiangshan Li^a, Yanxin Wang^a, Ruiping Wang^a, Yanru Wang^a, Xin Lin^c, Jianming Li^d

^a Department of Materials Science and Engineering, University of Science & Technology Beijing, Beijing, 100083, China;
^b Ceramic Science Institute China Building Materials Academy, Beijing, 100024, China
^c State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China;
^dBohai Shipyard Group Co., Ltd., Huludao, 125004, China

Received:2019-01-27 Revised:2019-03-02 Accepted:2019-03-18 Online:2019-07-20 Published:2019-06-20
Contact: Wang Shuming
About author:
¹These authors contributed equally to this work.

Abstract

Abstract:

At high temperature, the oxide redox reactions of ceria can split H₂O and CO₂ to produce H₂ and CO, so porous ceria with high temperature resistance and high specific surface area has an important foreground in clean energy applications. In this work, a reticulated porous ceria ceramic material with interconnected porous structure was prepared by the impregnation technique using organic polyurethane sponges as template. The influences of pretreated sponge, dipping time length, pore size and sintering temperature on the porosity and strength of the porous ceria ceramics were systematically studied. With the increasing sintering temperature, the glass phase occurred and led to an increase in strength, but an decrease in porosity. Eventually, we analyzed the relationships between porosity and strength of these porous materials, aiming to provide theoretical and practical references for its application in clean-energy field.

Key words: Porous ceramics, Porous ceria, Impregnation, Clean-energy

Shuming Wang, Xiaofang Zhang, Fenghua Kuang, Jiangshan Li, Yanxin Wang, Ruiping Wang, Yanru Wang, Xin Lin, Jianming Li. Preparation and properties of a new porous ceramic material used in clean energy field[J]. J. Mater. Sci. Technol., 2019, 35(7): 1255-1260.

Figures/Tables 10

Fig. 1. Flow chart for preparing reticulated porous ceria ceramics.

Fig. 2. Raw body that the sponge (a) was not pre-treated and (b) was pre-treated.

Fig. 3. Sintered body under different dipping runs: (a) 2; (b) 3; and (c) 4.

Fig. 4. Sintered body with (a) 35 ppi and (b) 10 ppi.

Fig. 5. XRD spectra of green powder and the powder of sintered body.

Table 1 Performance of reticulated porous ceria ceramics with different pore size.

Pore size	Performance
Pore size	Porosity (%)	Comprehensive strength (MPa)
10 ppi	72.52	0.13
35 ppi	63.79	0.24

Fig. 6. Microphotographs of fracture section of the sintered body: (a) 10 ppi, (b) 35 ppi.

Fig. 7. Microphotographs of (a) skeleton surface and (b) fracture section of sintered body.

Fig. 8. Glass phase on the surface of sintered body.

Fig. 9. Comprehensive strengths at different temperatures.

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Preparation and properties of a new porous ceramic material used in clean energy field

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