Fabrication of c-axis–oriented AlN bulk ceramics using a rotating magnetic field

Tohru S. Suzuki; Kiyoshi Kobayashi; Tetsuo Uchikoshi

doi:10.1111/ijac.14233

Fabrication of c-axis–oriented AlN bulk ceramics using a rotating magnetic field

Tohru S. Suzuki^*, Kiyoshi Kobayashi, Tetsuo Uchikoshi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Controlling the crystallographic orientation in bulk ceramics is expected to improve their properties that depend on the axis of the crystal structure. The development of crystallographic orientation using a magnetic field has been reported in various types of bulk ceramics with anisotropic crystal structures. In this study, c-axis–oriented AlN bulk ceramics were prepared by slip casting in a rotating high magnetic field. The c-axes of 61% of the grains were aligned within 20°. Due to this orientation, the thermal conductivity of AlN was improved. A thermal conductivity difference of approximately 14% at room temperature was observed for the samples with different orientation axes, which is higher than its intrinsic anisotropy.

Original language	English
Journal	International Journal of Applied Ceramic Technology
DOIs	https://doi.org/10.1111/ijac.14233
Publication status	Accepted/In press - 2022
Externally published	Yes

Keywords

bending strength
c-axis orientation
sintering
slip casting
thermal conductivity

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Marketing
Materials Chemistry

Access to Document

10.1111/ijac.14233

Cite this

@article{f4ba5500976d4605a992264b35a7d8c7,

title = "Fabrication of c-axis–oriented AlN bulk ceramics using a rotating magnetic field",

abstract = "Controlling the crystallographic orientation in bulk ceramics is expected to improve their properties that depend on the axis of the crystal structure. The development of crystallographic orientation using a magnetic field has been reported in various types of bulk ceramics with anisotropic crystal structures. In this study, c-axis–oriented AlN bulk ceramics were prepared by slip casting in a rotating high magnetic field. The c-axes of 61% of the grains were aligned within 20°. Due to this orientation, the thermal conductivity of AlN was improved. A thermal conductivity difference of approximately 14% at room temperature was observed for the samples with different orientation axes, which is higher than its intrinsic anisotropy.",

keywords = "bending strength, c-axis orientation, sintering, slip casting, thermal conductivity",

author = "Suzuki, {Tohru S.} and Kiyoshi Kobayashi and Tetsuo Uchikoshi",

note = "Funding Information: This study was partially supported by the Budget for Nuclear Research from MEXT, Japan and the Grant‐in‐Aid for Scientific Research from the JSPS of Japan and Innovative Science and Technology Initiative for Security Grant Number JPJ004596, ATLA, Japan. Publisher Copyright: {\textcopyright} 2022 The American Ceramic Society.",

year = "2022",

doi = "10.1111/ijac.14233",

language = "English",

journal = "International Journal of Applied Ceramic Technology",

issn = "1546-542X",

publisher = "Wiley-Blackwell",

}

TY - JOUR

T1 - Fabrication of c-axis–oriented AlN bulk ceramics using a rotating magnetic field

AU - Suzuki, Tohru S.

AU - Kobayashi, Kiyoshi

AU - Uchikoshi, Tetsuo

N1 - Funding Information: This study was partially supported by the Budget for Nuclear Research from MEXT, Japan and the Grant‐in‐Aid for Scientific Research from the JSPS of Japan and Innovative Science and Technology Initiative for Security Grant Number JPJ004596, ATLA, Japan. Publisher Copyright: © 2022 The American Ceramic Society.

PY - 2022

Y1 - 2022

N2 - Controlling the crystallographic orientation in bulk ceramics is expected to improve their properties that depend on the axis of the crystal structure. The development of crystallographic orientation using a magnetic field has been reported in various types of bulk ceramics with anisotropic crystal structures. In this study, c-axis–oriented AlN bulk ceramics were prepared by slip casting in a rotating high magnetic field. The c-axes of 61% of the grains were aligned within 20°. Due to this orientation, the thermal conductivity of AlN was improved. A thermal conductivity difference of approximately 14% at room temperature was observed for the samples with different orientation axes, which is higher than its intrinsic anisotropy.

AB - Controlling the crystallographic orientation in bulk ceramics is expected to improve their properties that depend on the axis of the crystal structure. The development of crystallographic orientation using a magnetic field has been reported in various types of bulk ceramics with anisotropic crystal structures. In this study, c-axis–oriented AlN bulk ceramics were prepared by slip casting in a rotating high magnetic field. The c-axes of 61% of the grains were aligned within 20°. Due to this orientation, the thermal conductivity of AlN was improved. A thermal conductivity difference of approximately 14% at room temperature was observed for the samples with different orientation axes, which is higher than its intrinsic anisotropy.

KW - bending strength

KW - c-axis orientation

KW - sintering

KW - slip casting

KW - thermal conductivity

UR - http://www.scopus.com/inward/record.url?scp=85139400036&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85139400036&partnerID=8YFLogxK

U2 - 10.1111/ijac.14233

DO - 10.1111/ijac.14233

M3 - Article

AN - SCOPUS:85139400036

JO - International Journal of Applied Ceramic Technology

JF - International Journal of Applied Ceramic Technology

SN - 1546-542X

ER -

Fabrication of c-axis–oriented AlN bulk ceramics using a rotating magnetic field

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this