| Title |
Enhancement of Flexural Strength by Slip Casting Cordierite Ceramics with h-BN Nanoparticles |
| Authors |
박철오(Chul Oh Park); 이종현(Jong Hyun Lee); 이동균(Dong Kyun Lee); 조현준(Hyun Jun Cho); 임성환(Sung Hwan Yim); 이규형(Kyu Hyoung Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2024.62.4.306 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
flexural strength; cordierite; hexagonal boron nitride; slip casting |
| Abstract |
In this study, we enhanced the flexural strength of cordierite ceramics by incorporating h-BN (hexagonal boron nitride) nanoparticles, facilitated by the slip casting process. Initially, commercial cordierite powder with an average particle size of 10 mm underwent a ball-milling process to reduce the size to 2.5 mm and simultaneously achieve a narrower particle size distribution. The resulting slurry, composed of 67% solid content, exhibited improved stability during the slip casting process for both pristine cordierite and the mixture containing 1 - 2 wt% h-BN nanoparticles. After sintering, the bulk material containing 2wt% h-BN nanoparticles demonstrated a remarkable flexural strength of 174.8 MPa, a significant improvement compared to the initial 119.5 MPa obtained without the addition of h-BN. It is worth noting that the introduction of h-BN nanoparticles did not induce substantial changes in dielectric constant and thermal conductivity, indicating that the desired mechanical enhancement did not compromise other crucial material properties. This research demonstrates a successful approach to concurrently optimize the flexural strength, dielectric constants, and thermal conductivity of cordierite ceramics. This breakthrough opens up new avenues for advanced applications in a wide range of fields, from electronics to aerospace, where high-strength, thermally stable materials are in demand.(Received 7 November, 2023; Accepted 26 December, 2023) |