Low-temperature preparation of humidity self-regulating porous ceramics with high strength performance
| Autor: | Shanjun Ke, Chao He, Anze Shui, Xiuan Xi, Liangliang Huang, Wei Tian, Bin Du, Weiwei Chen |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Moisture Mechanical Engineering Humidity 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Flexural strength Mechanics of Materials visual_art visual_art.visual_art_medium General Materials Science Ceramic Composite material Calcium silicate hydrate 0210 nano-technology Porosity Fumed silica |
| Zdroj: | Materials Letters. 243:128-131 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2019.02.019 |
| Popis: | Nanopores are very important to the moisture adsorption properties of humidity self-regulating ceramics (HSCs). As nanopores disappear easily during high temperature firing processes, it is important to prepare HSCs at low firing temperatures. But such materials generally lack the mechanical strength needed to meet building material standards. Accordingly, this study used fumed silica as a body enhancer added to volcanic mud raw material to prepare an HSC. The effects of fumed silica content, water addition and firing temperature on flexural strength, porosity, and moisture adsorption were investigated in detail. The results show that, by controlling the amounts of fumed silica and water added, the HSC can achieve high moisture adsorption of 302 g/m2. Furthermore, its flexural strength is greater than 12 MPa by only firing at 600 °C, owing to the formation of calcium silicate hydrate in the porcelain green bodies. These results indicate that this proposed method is a very promising and simple approach to the preparation of high strength performance humidity self-regulating porous ceramics. |
| Databáze: | OpenAIRE |
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