Work

Nanopowder synthesis and pressureless sintering of nanocrystalline Y 3 Al 5 O 12 ceramics

Year: 2025

Type: article

Abstract: The exploration of sintering dynamics in systems involving oxide nanoparticles is vital for the production of nanocrystalline oxide ceramics. Until now, a thorough investigation into the sintering kinetics of well‐dispersed, fine‐grained yttrium aluminum garnet yttrium aluminum garnet (Y 3 Al 5 O 12 ; YAG) nanoparticles has been lacking. In this study, we delve into the sintering kinetics of uniformly dispersed, equiaxed YAG nanoparticles, which possess an average diameter of 9 nm and span a size range from 3 to 39 nm. We have successfully fabricated dense YAG ceramics with an average grain size of 86 nm through a pressureless sintering process in air atmosphere at a mere 1200°C for a duration of 2 h. This sintering temperature marks the lowest recorded for the pressureless sintering of YAG ceramics. The resulting nearly fully dense YAG nanocrystalline ceramics showcase the finest grain size achieved to date via pressureless sintering techniques, aligning with our efforts to refine grain size and reduce sintering temperatures in advanced ceramic materials.

Source: Journal of the American Ceramic Society

DOI: 10.1111/jace.20684

Authors: Yuanyuan Li, Hongbing Yang, Yilei Huang, Shichang Cheng, Chang‐An Wang, Yanhao Dong

Institutions: State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University

Language: English

Topic: Advanced ceramic materials synthesis

Subfield: Ceramics and Composites

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China

Awards: G385018584, G446588456, G533177215