Health & Environmental Research Online (HERO)


Print Feedback Export to File
8481930 
Journal Article 
LaMgAl11O19 synthesis using non-hydrolytic sol-gel methods 
Dolezal, V; Nadherny, L; Rubesova, K; Jakes, Vit; Michalcova, A; Jankovsky, O; Poupon, M; , 
2019 
1 
Ceramics International
ISSN: 0272-8842
EISSN: 1873-3956 
ELSEVIER SCI LTD 
OXFORD 
11233-11240 
WOS:000466253500009 
Polycrystalline LaMgAl11O19 (LMA) was prepared by four different non-hydrolytic sol-gel methods. From stable solutions, four powder precursors containing an amorphous and nanocrystalline phase with specific reactivity were obtained. The particle size, morphology, thermal behaviour, and phase composition of the powder precursors were studied using DLS, TEM, DSC/TG and XRD. Bulk ceramic samples containing LMA were prepared at 1200 degrees C for 16 h and examined in terms of phase purity and microstructure using XRD, SEM, and TEM. Raman spectroscopy of pure LMA was used to study the structure in detail. A mechanism of LMA formation and a relation between powder precursor properties and final phase composition is proposed. These findings may be useful for designing modern technologies for fabrication of LMA for optical or protective coating applications.