Effect of graphene addition on a borosilicate glass/alumina composite for LTCC technology. Issue 9 (1st May 2021)

• Record Type: Journal Article
• Authors: Lv, Yuanyuan; Zhang, Lan; Yang, Shuquan; Wang, Zhihua; Chen, Lin; Sun, Jun; Li, Xiaoxiao; Ding, Jianjun; Zheng, Kang; Gong, Yi; Zhang, Xian; Tian, Xingyou
• Is Part Of: Ceramics international. Volume 47:Issue 9(2021)
• Page Start: 13035
• Page End: 13042
• Publication Date: 2021-05-01
• Subjects: Graphene nanoplatelets -- LTCC -- Tape casting -- Thermal conductivity; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.01.167
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The effect of graphene nanoplatelets (GNPs) on the thermal conductivity of low temperature co-fired ceramic (LTCC) materials based on ZnO–B2 O3 –Na2 CO3 –Al2 O3 –SiO2 (ZBNAS) glass/Al2 O3 composites sintered at 850 °C for 2 h were systematically investigated. The sintered sheets were prepared by standard tape casting process and solid phase sintering. The microstructure and phase composition of the sintered sheets were characterized by SEM and XRD, respectively. With the addition of 0.75 wt% GNPs, the thermal conductivity of the sintered sheet was increased from 3.91 to 7.85 W/(m·K). Meanwhile, the 0.75 wt% GNPs-Al2 O3 -ZBNAS glass (GNPs(0.75)/Al2 O3 /ZBNAS) composite achieved low dielectric constant of 5.16 and dielectric loss of 0.13 at 18 GHz. The coefficients of thermal expansion (CTE) of the sintered sheets decrease first and then increase. The CTE of GNPs(0.75)/Al2 O3 /ZBNAS composite is −7.13 × 10 −6 °C −1 and 3.20 × 10 −6 °C −1 at low temperature (25–80 °C) and high temperature (80–200 °C), respectively. The obtained graphene-based LTCC materials are promising candidates in terms of the potential application of electronic devices with high thermal conductivity requirement.