Preparation and properties of MgAl2O4 based ceramics reinforced with rod-like microcrystallines by co-doping Sm2O3 and La2O3
Source abstract
Abstract
Abstract A rod-like microcrystalline reinforced MgAl2O4 (MA) based ceramic with high strength and good thermal shock resistance has been successfully prepared by co-doping Sm2O3 and La2O3 via a single-stage solid-state reaction sintering (SRS) process. The effects of addition amounts of Sm2O3 and La2O3 on the phase compositions, microstructures, shrinkage ratio, apparent porosity, bulk density, high temperature compressive strength and thermal shock resistance of the MA based ceramics have been investigated. The results showed that MA, SmAlO3, La10Al4O21, Sm4.67(SiO4)3O and La4.67(SiO4)3O phases could be found in the ceramics after co-doping additives. The new formed rare earth compounds could prevent the growth of MA grains leading to a densification microstructure of the MA based ceramics. The Sm4.67(SiO4)3O and La4.67(SiO4)3O were formed by the reaction between additives and impurities of raw materials, which presented as rod-like microcrystallines to effectively clean the impurities in the grain boundaries of the MA based ceramics. Accordingly, the sintering properties, high temperature compressive strength and thermal shock resistance of the MA based ceramics were improved markedly.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Nuclear materials and radiation effects · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Low cost foam-gel casting preparation and characterization of porous magnesium aluminate spinel (MgAl2O4) ceramics10.1016/j.ceramint.2016.08.145 ↗
2. Synthesis of nanocrystalline MgO-MgAl2O4 spinel powders from industrial wastes10.1016/j.jallcom.2016.08.279 ↗
3. A green fabrication strategy for MgAl2O4 foams with tunable morphology10.1039/C6RA01255H ↗
4. Characterization of nanostructured MgAl2O4 ceramics fabricated by spark plasma sintering10.1016/j.ceramint.2016.02.130 ↗
5. Densification behavior of a fine-grained MgAl2O4 spinel during spark plasma sintering (SPS)10.1016/j.scriptamat.2010.06.012 ↗
6. High-pressure transitions in MgAl2O4 and a new high-pressure phase of Mg2Al2O510.1016/j.jssc.2008.11.015 ↗
7. Comparative study of microwave and conventional processing of MgAl2O4-based materials10.1016/j.ceramint.2003.10.010 ↗
8. Microwave assisted solid state reaction synthesis of MgAl2O4 spinel powders10.1016/S0955-2219(03)00602-2 ↗
9. Production and characterization of transparent MgAl2O4 prepared by hot pressing10.1016/j.jeurceramsoc.2012.10.013 ↗
10. Fabrication of transparent MgAl2O4 spinel through homogenous green compaction by microfluidization and slip casting10.1016/j.ceramint.2015.07.121 ↗
11. Microwave dielectric properties and crystal structures of spinel-structured MgAl2O4 ceramics synthesized by a molten-salt method10.1016/j.jeurceramsoc.2016.10.018 ↗
12. Effect of in situ generated nascent magnesia and alumina from nitrate precursor on reaction sintered magnesium aluminate spinel10.1016/j.matdes.2016.07.095 ↗
13. Synthesis of nano-sized spinel (MgAl2O4) from short mechanochemically activated chloride precursors and its sintering behavior10.1016/j.apt.2014.09.011 ↗
14. Synthesis of magnesium aluminate spinels from bauxites and magnesium10.1111/j.1151-2916.2002.tb00569.x ↗
15. A new sintering aid for magnesium aluminate spinel10.1016/S0272-8842(01)00029-3 ↗
16. Effect of MgCl2 addition on the sintering behavior of MgAl2O4 spinel and formation of nano-particles10.2298/SOS1402157M ↗
17. Reducing the sintering temperature for MgO-Al2O3 mixtures by addition of cryolite (Na3AlF6)10.1111/j.1151-2916.2002.tb00130.x ↗
18. A comparative study on the effect of different additives on the formation and densification of magnesium aluminate spinel10.1016/j.ceramint.2016.05.206 ↗
19. Effect of ZrO2 addition on MgAl2O4 spinel from commercial grade oxide reactants10.1016/j.ceramint.2016.03.167 ↗
20. Effect of addition of TiO2 on reaction sintered MgO-Al2O3 spinels10.1016/S0955-2219(00)00097-2 ↗
21. Effect of addition of Cr2O3 on the properties of reaction sintered MgO-Al2O3 spinels10.1016/S0955-2219(01)00446-0 ↗
22. Effect of additives on the sintering of MgAl2O4
23. The effect of SnO2 on the improvement of mechanical properties of MgO-MgAl2O4 composites10.1016/j.compositesb.2012.02.022 ↗
24. Effect of Sc2O3 addition on densification and microstructure of different spinelized magnesium aluminate spinels10.1016/S1003-6326(16)64099-2 ↗
25. Direct correlations between fracture toughness and grain boundary segregation behavior in ytterbium-doped magnesium aluminate spinel10.1016/j.scriptamat.2013.03.002 ↗
26. The effect of Y2O3 addition on thermal shock behavior of magnesium aluminate spinel10.2298/SOS0901075P ↗
27. Synthesis and densification behaviour of magnesium aluminate spinel: effect of Dy2O310.1016/j.ceramint.2009.02.011 ↗
28. In-situ formation and densification of MgAl2O4-SmAlO3 ceramics by a single-step reaction sintering process
29. In-situ formation and densification of MgAl2O4-Y3Al5O12 and MgAl2O4-MgNb2O6 ceramics via a single-stage SRS process10.2298/SOS1703285Z ↗
30. Preparation and sintering properties of zirconia-mullite-corundum composites using fly ash and zircon10.1016/S1003-6326(10)60650-4 ↗
31. Preparation and properties of Al2O3-MgAl2O4 ceramic foams10.1016/j.ceramint.2014.11.013 ↗
32. Thermal properties and thermal shock resistance of c-Y2Si2O710.1111/j.1551-2916.2008.02470.x ↗
33. Liquidus surface of MgO–CaO–Al2O3–SiO2 glass-forming systems10.1016/j.jnoncrysol.2012.12.020 ↗
34. Formation of rod-like Si3N4 grains in porous SRBSN bodies using 6Y2O3–2MgO sintering additives10.1016/j.ceramint.2009.01.010 ↗
35. Molten salt synthesis of magnesium aluminate (MgAl2O4) spinel powder10.1111/j.1551-2916.2006.00932.x ↗
36. One-directional grain-oriented lead metaniobate ceramics10.1143/JJAP.24.812 ↗
37. Lead zirconate titanate ceramics from molten salt solvent synthesized powders10.1016/0025-5408(79)90055-2 ↗
38. Preparation and thermal shock resistance of corundum-mullite composite ceramics from andalusite10.1016/j.ceramint.2016.10.116 ↗