Development and Properties of New Mullite Based Refractory Grog
| Autor: | Pavel Kovář, Petr Štursa, Lukáš Tvrdík, Karel Lang, Lenka Nevřivová, David Zemánek, Dalibor Všianský, Karel Dvořák, Lucie Keršnerová |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Scanning electron microscope Mullite 02 engineering and technology Raw material 01 natural sciences lcsh:Technology Article claystone 0103 physical sciences General Materials Science kaolin Porosity jílovec lcsh:Microscopy high-alumina grog lcsh:QC120-168.85 010302 applied physics Aggregate (composite) Grog lcsh:QH201-278.5 lcsh:T kaolín Metallurgy mullit žáruvzdorná keramika vysoce hlinité ostrivo 021001 nanoscience & nanotechnology Microstructure mullite Laboratory oven refractory lcsh:TA1-2040 visual_art visual_art.visual_art_medium lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 |
| Zdroj: | Materials Volume 14 Issue 4 Materials, Vol 14, Iss 779, p 779 (2021) Materials . 2021, vol. 14, issue 4, p. 1-15. |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14040779 |
| Popis: | The presented study is focused on optimization and characterization of a high-alumina refractory aggregate based on natural raw materials—kaolins, claystone, and mullite dust by-product (used to increase the alumina and mullite contents, respectively). In total, four individual formulas with the Al2O3 contents between 45 and 50 wt.% were designed the samples were subsequently fired, both in a laboratory oven and an industrial tunnel furnace. The effects of repeated firing were examined during industrial pilot tests. Mineral and chemical compositions and microstructures, of both the raw materials and designed aggregates, were thoroughly investigated by the means of X-ray fluorescence spectroscopy, powder X-ray diffraction, and optical and scanning electron microscopies. Porosity, mineral composition, and mullite crystal-size development during the firing process were also studied. Based on the acquired results, the formula with the perspective to be used as a new mullite grog, featuring similar properties as the available commercial products, however, with reduced production expenses, was selected. The quality of grog determines to a large extent the properties of the final product. Hence, optimization of aggregates for specific refractories is of a great importance. The production of engineered aggregates provides the opportunity to utilize industrial by-products. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |