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- W2110168425 abstract "Self-strengthened mullite ceramics with interlocking columnar grains formed through enhanced anisotropic growth by adding La2O3 were prepared from coal gangue and γ-Al2O3 within the temperature range 1400–1550 °C and holding time of 4 h. The effects of La2O3 on the bending strength, microstructural evolution, and phase composition were studied. The results showed that the bending strength of the as-prepared ceramics was significantly improved by the addition of La2O3. For samples sintered at 1550 °C, the bending strength increased from 64 MPa to 218 MPa as the La2O3 content increased from 0 mol% to 10 mol%. X-ray diffraction analysis suggested that the formation temperature of secondary mullite was lowered by about 50 °C by adding La2O3. Scanning electron micrographs revealed that the La2O3-added mullite mostly existed in long, columnar form, with aspect ratios of 3–6, forming an interlocking network structure. The interlocking mullite columns, together with the enhanced densification behaviour, contributed to the improved bending strength." @default.
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- W2110168425 date "2013-08-01" @default.
- W2110168425 modified "2023-10-17" @default.
- W2110168425 title "Effect of La 2 O 3 additives on the strength and microstructure of mullite ceramics obtained from coal gangue and γ-Al 2 O 3" @default.
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- W2110168425 doi "https://doi.org/10.1016/j.ceramint.2013.02.016" @default.
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