Open-cell cordierite-based foams from eco-friendly geopolymer precursors via replica route

被引：5

作者：

Bai, Chengying ^{[1
,2
]}

Li, Bozhi ^{[1
]}

Ma, Chengli ^{[1
]}

Li, Xinyu ^{[1
]}

Wang, Xiaodong ^{[1
]}

Wang, Bin ^{[2
]}

Yang, Kun ^{[3
]}

Colombo, Paolo ^{[4
,5
]}

机构：

[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China

[2] City Univ Hong Kong, Dept Mech Engn, Hong Kong 999077, Peoples R China

[3] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China

[4] Univ Padua, Dept Ind Engn, I-35131 Padua, Italy

[5] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

来源：

CERAMICS INTERNATIONAL | 2024年 / 50卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Porous materials; Geopolymer foams; Cordierite ceramics; Replica; CERAMICS; POWDERS; FORM; ASH;

D O I：

10.1016/j.ceramint.2024.01.352

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Open -cell cordierite-based foams with high porosity were synthesized by a facile replica route, using geopolymers as precursors and polyurethane foams as polymer templates. The geopolymer precursors, incorporating MgO as an additional magnesium source, were prepared using metakaolin and fly ash under activation of NaOH solution and sodium silicate solution. Polyurethane foams with geopolymer were obtained by an impregnation method. The hybrid foams comprising polyurethane foam and geopolymer were cured/solidified at 75 degrees C for 24 h. Subsequently, the hybrid foams were subjected to ammonium ion -exchange followed by sintering at 1200 degrees C for 2 h to produce porous cordierite-based ceramics. The resulting foamed ceramics were characterized in terms of bulk density, porosity, structural evolution, and mechanical properties. Porous cordierite-based ceramic foams exhibiting a total porosity of approximately 88.64 vol% and a compressive strength of around 0.47 MPa were successfully fabricated by the replica route.

引用

页码：15340 / 15347

页数：8

共 57 条

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