Effects of the size of expanded polystyrene as a pore-former on the properties of insulating firebricks
| Autor: | A. Ramezani, S. Nemat, S.M. Emami |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Pore size Materials science Process Chemistry and Technology 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Expanded polystyrene Surfaces Coatings and Films Electronic Optical and Magnetic Materials Thermal conductivity Phase (matter) 0103 physical sciences Volume fraction Materials Chemistry Ceramics and Composites Composite material 0210 nano-technology Porosity |
| Zdroj: | Ceramics International. 44:6641-6644 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.01.072 |
| Popis: | The effect of the pore size on the properties of insulating firebricks was studied when different grain sizes of the expanded polystyrene (EPS) were used as an organic pore-forming agent. In particular, porous firebricks were produced by extruding of EPS and other materials. Due to the different grain sizes of EPS, insulating firebricks with different pore sizes were obtained. The results showed that the bricks with a smaller pore size (EPS 1.4 samples) had higher cold crushing strength. It is due to the higher continuity of the solid phase between the pores of the EPS 1.4 samples regarding EPS 2.8 bricks. Although the percent of reheat change of both EPS 2.8 and EPS 1.4 samples were nearly equal up to 1000 °C, EPS 2.8 bricks shrank faster than EPS 1.4 firebricks above 1000 °C. The thermal conductivity of the EPS 2.8 samples was higher than EPS 1.4 bricks. It can be concluded that in equal volume fraction of voids, the greater the number of pores of smaller size, the lower the thermal conductivity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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