The effect of magnesium compounds (MgO and MgAl2O4) on the synthesis of Lanthanum magnesium hexaaluminate (LaMgAl11O19) by solid-state reaction method
Source abstract
Abstract
Abstract In the present study, the lanthanum magnesium hexaaluminate (LaMgAl 11 O 19 )(LaMA) powder was synthesized by the solid–state reaction method using two types of magnesium compounds, including magnesium oxide (MgO) and magnesium aluminate (MgAl 2 O 4 ) spinel (MAS). The effect of substitution of magnesium oxide with MAS on the synthesis temperature, intermediate compounds and morphology of synthesized powders were investigated. The microstructural results showed that the intermediate compounds of lanthanum aluminate (LaAlO 3 ), aluminum oxide and MAS were formed in the presence of magnesium oxide, whereas in the latter case, the LaAlO 3 intermediate phase was not observed and La 4 Al 2 MgO 10 was formed at about 810 °C. Also in both cases, a single LaMA phase with the platelet-like morphology was formed. The thickness of the LaMA platelets decreased from 300 nm to 125 nm and the synthesis temperature increased from 1330 °C to 1355 °C, by replacing MgO with MAS.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Magnesium Oxide Properties and Applications · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Thermal aging behavior of plasma sprayed LaMgAl11O19 thermal barrier coating10.1016/j.jeurceramsoc.2011.05.036 ↗
2. New functionally graded thermal barrier coating system based on LaMgAl11O19/YSZ prepared by air plasma spraying10.1016/j.surfcoat.2011.09.076 ↗
3. Microstructure and thermal cycling behavior of air plasma-sprayed YSZ/LaMgAl11O19 composite coatings10.1007/s11666-011-9683-4 ↗
4. Naga · 2014
5. Overview on advanced thermal barrier coatings10.1016/j.surfcoat.2010.08.151 ↗
6. Ceramic materials for thermal barrier coatings10.1016/S0955-2219(03)00129-8 ↗
7. Thermal cycling failure of new LaMgAl11O19/YSZ double ceramic top coat thermal barrier coating systems10.1016/j.surfcoat.2010.11.059 ↗
8. Lanthanum-lithium hexaaluminate-a new material for thermal
9. G. S. Rainer Gadow, Thermal insulating material and method of producing same, US 6,998,064 B2, 2006.
10. Combustion for gas turbine applications
11. Hot corrosion behaviour of plasma sprayed YSZ/LaMgAl11O19 composite coatings in molten sulfate-vanadate salt10.1016/j.corsci.2011.03.019 ↗
12. New material concepts for the next generation of plasma-sprayed thermal barrier coatings10.1007/s11666-004-0052-4 ↗
13. Thermal-shock resistance of LnMgAl11O19 (Ln = La, Nd, Sm, Gd) with magnetoplumbite structure
14. Preparation and characterization of LnMgAl11O19 (Ln˭La, Nd, Gd) ceramic powders10.1016/j.ceramint.2013.04.073 ↗
15. Product prediction: intermediates formed during rare earth reactions
16. Modern inorganic synthetic chemistry
17. Thermal stabilization of alumina modified by lanthanum10.1016/j.micromeso.2014.05.016 ↗
18. Metastable alumina polymorphs: crystal structures and transition sequences10.1111/j.1151-2916.1998.tb02581.x ↗
19. Ceramic processing and sintering10.1179/095066096790151286 ↗
20. The thermal transformation from lanthanum hydroxide to lanthanum hydroxide oxide10.1016/j.tca.2005.06.013 ↗
21. Formation and decomposition of some rare earth (RE = La, Ce, Pr) hydroxides and oxides by homogeneous precipitation10.1016/j.jallcom.2004.12.073 ↗
22. Thermal cycling behaviors of the plasma sprayed thermal barrier coatings of hexaluminates with magnetoplumbite structure10.1016/j.jeurceramsoc.2010.01.013 ↗