Abstract
The effects of γ‐irradiation and the application of different precursors on the formation of gadolinium aluminate (GdAlO3) nanoparticles (NPs) have been studied in detail. GdAlO3 NPs were prepared by using different gadolinium‐based precursors including gadolinium acetate (Gd(CH3COO)3·4H2O) and gadolinium nitrate (Gd(NO3)3·6H2O), while Al2O3 and Al(NO3)3·9H2O were used as the source of Al3+. The preparation of GdAlO3 was carried out by two different methods, solid‐state reaction and sol‐gel process. To study the effect of γ‐irradiation, both irradiated and unirradiated Gd(CH3COO)3·4H2O have been tested for the preparation of gadolinium aluminate (GdAlO3). Notably, Gd(CH3COO)3·4H2O did not produce GdAlO3 in both solid‐state and sol‐gel processes even after optimizing various parameters, including the application of γ‐irradiation. However, single‐phase nanocrystalline GdAlO3 NPs were successfully obtained from the reaction of gadolinium nitrate Gd(NO3)3·6H2O and Al(NO3)3·9H2O by a sol‐gel process. The formation of NPs has been confirmed by X‐ray diffraction analysis (XRD) and Fourier‐transform infrared (FT‐IR) spectroscopy. The results indicate towards the formation of an orthorhombic perovskite structure of GdAO3 in the Pbnm space group. Transmission electron microscopy (TEM) has been employed for the particle‐size analysis, which revealed the formation of spherical‐shaped nanoparticles with the size range of 50–70 nm. Surface morphology of the sintered pellet was obtained from high‐resolution scanning electron microscopy (HR‐SEM). Besides, the effect of irradiation with γ‐rays on the quality of resultant NPs has also been studied.
Highlights
Among various rare-earth materials, perovskite-type rareearth oxides and aluminates have gained immense interest as a promising class of materials [1]
Gadolinium aluminate (GdAlO3) belongs to an important class of rare-earth aluminates from the perovskite family of compounds with the ABO3 structure [5]. is material at the nanoscale level possesses superior powder properties including better phase homogeneity, good sinter ability, and enhanced physicochemical properties [6]. e synthesis of GdAlO3 is often challenging and usually carried out by solid-state reaction of Gd2O3 and Al2O3 at elevated temperatures [7]. This technique usually requires extensive mixing of materials or vigorous grinding and high temperatures, which may Advances in Materials Science and Engineering negatively impact the microstructure of the resultant material [8]. erefore, GdAlO3 has been prepared using different wet-chemical methods such as, polymerized complex route, combustion synthesis, and sol-gel process [9]
Solid-State Reaction. e solid-state reaction is one of the most common methods applied for the preparation of rare-earth polycrystalline material including GdAlO3. ese materials are prepared by using solid gadolinium acetate or gadolinium nitrate as precursors. ese solid starting materials do not react at mild temperatures and often require very high temperatures (∼1500°C)
Summary
Among various rare-earth materials, perovskite-type rareearth oxides and aluminates have gained immense interest as a promising class of materials [1]. E synthesis of GdAlO3 is often challenging and usually carried out by solid-state reaction of Gd2O3 and Al2O3 at elevated temperatures [7] This technique usually requires extensive mixing of materials or vigorous grinding and high temperatures, which may Advances in Materials Science and Engineering negatively impact the microstructure of the resultant material [8]. Erefore, GdAlO3 has been prepared using different wet-chemical methods such as, polymerized complex route, combustion synthesis, and sol-gel process [9] Using these methods, the powder characteristics of the resultant material such as its sinter ability and phase purity can be potentially improved [10]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
