All-ceramics with ultrahigh thermal conductivity and superior dielectric properties created at ultralow temperatures

Chen, Naichao1,2; Li, Li1,2; Xu, Xinwei1,2; Wang, Chengyuan1,2; Cheng, Jin1,2; Liu, Weishu1,2; Wang, Hong1,2

2024-03-20

10.1016/j.xcrp.2024.101881

CELL REPORTS PHYSICAL SCIENCE   影响因子和分区

2666-3864

Ceramics that are thermally conductive and can be sintered at low temperatures are particularly desired for hybrid integration and cofired technology in upsurging high -frequency communication applications. However, a seemingly contradictory relation between high thermal conductivity and low sintering temperature remains a critical challenge. Herein, we report that densified and oriented boron nitride (BN)-based ceramic composites that are sintered at ultralow temperatures (e.g., 150 degrees C) exhibit an ultrahigh thermal conductivity (42 W m - 1 K - 1 ), far outperforming current state-of-the-art low -temperature ceramics. We reveal by experiments and simulations that the high thermal conductivity of the ceramic composites is attributable to a high density and high orientation of BN platelets that were previously unattainable at low temperatures, as further supported by our newly developed theoretical model. Coupled with simultaneously achieved excellent microwave dielectric properties, this work opens up a new avenue to high -thermal -conductivity ceramics that are integrable with high -power devices at low temperatures.

SCI

英语

第一 ; 通讯

National Natural Science Foundation of China[92066208] ; National Key Research and Development Program, China[JCYJ20220818100613029] ; Shenzhen Science and Technology Program, China["JSGGZD20220822095603006","2021B1212040001","2021YFB3800603"] ; Guangdong Provincial Key Laboratory Program, China[KQTD20180411143514543]

Chemistry ; Energy & Fuels ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary

WOS:001258492000001

CELL PRESS

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Provis Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Peoples R China

Chen, Naichao,Li, Li,Xu, Xinwei,et al. All-ceramics with ultrahigh thermal conductivity and superior dielectric properties created at ultralow temperatures[J]. CELL REPORTS PHYSICAL SCIENCE,2024,5(3).

Chen, Naichao.,Li, Li.,Xu, Xinwei.,Wang, Chengyuan.,Cheng, Jin.,...&Wang, Hong.(2024).All-ceramics with ultrahigh thermal conductivity and superior dielectric properties created at ultralow temperatures.CELL REPORTS PHYSICAL SCIENCE,5(3).

Chen, Naichao,et al."All-ceramics with ultrahigh thermal conductivity and superior dielectric properties created at ultralow temperatures".CELL REPORTS PHYSICAL SCIENCE 5.3(2024).