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Vol.62, No.4, 306 ~ 312, 2024
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| Title |
| Enhancement of Flexural Strength by Slip Casting Cordierite Ceramics with h-BN Nanoparticles |
| 박철오 Chul Oh Park , 이종현 Jong Hyun Lee , 이동균 Dong Kyun Lee , 조현준 Hyun Jun Cho , 임성환 Sung Hwan Yim , 이규형 Kyu Hyoung Lee |
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| 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) |
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| Key Words |
| flexural strength, cordierite, hexagonal boron nitride, slip casting |
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