Highly porous mullite ceramics from engineered alkali activated suspensions

This study focuses on the development of an alkali-activated lightweight foamed material (AA-LFM) with enhanced density. Several mixes of tungsten waste mud (TWM), grounded waste glass (WG), and metakaolin (MK) were produced. Al powder as a foaming agent was added, varying from 0.009 w.% to 0.05 w.% of precursor weight. Expanded granulated cork (EGC) particles were incorporated (10% to 40% of the total volume of precursors). The physical and mechanical properties of the foamed materials obtained, the effects of the amount of the foaming agent and the percentage of cork particles added varying from 10 vol.% to 40% are presented and discussed. Highly porous structures were obtained, Pore size and cork particles distribution are critical parameters in determining the density and strength of the foams. The compressive strength results with different densities of AA-LFM obtained by modifying the foaming agent and cork particles are also presented and discussed. Mechanical properties of the cured structure are adequate for lightweight prefabricated building elements and components.

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Preparation of high strength porous mullite ceramics via combined foam-gelcasting and microwave heating

Ceramics International ◽

10.1016/j.ceramint.2018.05.101 ◽

2018 ◽

Vol 44 (12) ◽

pp. 14728-14733 ◽

Cited By ~ 21

Author(s):

Lei Han ◽

Xiangong Deng ◽

Faliang Li ◽

Liang Huang ◽

Yuantao Pei ◽

...

Keyword(s):

Microwave Heating ◽

High Strength ◽

Porous Mullite ◽

Mullite Ceramics

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Microstructure and mechanical performance of porous mullite ceramics added with TiO2

Ceramics International ◽

10.1016/j.ceramint.2019.12.078 ◽

2020 ◽

Vol 46 (6) ◽

pp. 8438-8443 ◽

Cited By ~ 1

Author(s):

Xiangong Deng ◽

Wanchun Zhang ◽

Jiaqiang Yin ◽

Chaoheng Deng ◽

Shaowei Zhang ◽

...

Keyword(s):

Mechanical Performance ◽

Porous Mullite ◽

Mullite Ceramics

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A novel method based on ultrastable foam and improved gelcasting for fabricating porous mullite ceramics with thermal insulation–mechanical property trade-off

Journal of Porous Materials ◽

10.1007/s10934-015-0091-x ◽

2015 ◽

Vol 23 (2) ◽

pp. 381-388 ◽

Cited By ~ 7

Author(s):

Xing Du ◽

Lei Zhao ◽

Xuan He ◽

Xin Wang ◽

Weimin Qu ◽

...

Keyword(s):

Mechanical Property ◽

Thermal Insulation ◽

Trade Off ◽

Porous Mullite ◽

Novel Method ◽

Mullite Ceramics

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Microstructure and properties of lightweight fibrous porous mullite ceramics prepared by vacuum squeeze moulding technique

Ceramics International ◽

10.1016/j.ceramint.2016.06.118 ◽

2016 ◽

Vol 42 (13) ◽

pp. 14843-14848 ◽

Cited By ~ 29

Author(s):

Rubing Zhang ◽

Changshou Ye ◽

Xiaobo Hou ◽

Shaohua Li ◽

Baolin Wang

Keyword(s):

Microstructure And Properties ◽

Porous Mullite ◽

Mullite Ceramics

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Influence of Metal Oxides Additives on the Porous Mullite Ceramics

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.604.293 ◽

2014 ◽

Vol 604 ◽

pp. 293-296 ◽

Cited By ~ 1

Author(s):

Ludmila Mahnicka-Goremikina ◽

Ruta Svinka ◽

Visvaldis Svinka

Keyword(s):

Thermal Conductivity ◽

Metal Oxides ◽

Slip Casting ◽

Casting Method ◽

Mullite Phase ◽

Porous Mullite ◽

Positive Effect ◽

Dominant Phase ◽

Mullite Ceramics

The porous mullite ceramics doped with such metal oxides as ZrO2, WO3 and MgO in quantity of 5 wt% were prepared by slip casting method. The mullite phase was the main and dominant phase of ZrO2-, WO3- and MgO-doped samples, which were sintered at the temperatures of 1650°C, 1500°C, respectively. The ZrO2, WO3 and MgO had the positive effect on the increase of porosity and decrease of thermal conductivity of porous mullite ceramics and the degree of this effect was in the order of ZrO2<MgO<WO3.

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