Al₂O₃/glass/hBN composites with high thermal conductivity and low dielectric constant for low temperature cofired ceramic applications

Abstract

To cite this article: Oğuzhan Bilaç & Cihangir Duran (2021): Al 2 O 3 /glass/hBN composites with high thermal conductivity and low dielectric constant for low temperature cofired ceramic applications, Journal of Asian Ceramic Societies,

Enhanced Sinterability, Thermal Conductivity and Dielectric Constant of Glass-Ceramics with PVA and BN Additions

“…Therefore, it can be inferred that the hBN phase itself effectively optimized both microstructure and density, as well as dielectric and thermal properties. Thus, the G12BN@770 sample has comparable dielectric and thermal properties to similar products reported in previous studies, with a densification temperature of 770 • C [48]. On the other hand, the highest dielectric constant, of 4.43, was obtained for the G6BN@770.…”

“…The obtained results were compared to commercially produced LTCC glass-ceramics sintered at 800–900 °C, which also used B 2 O 3 to lower the sintering temperature. It was observed that they had comparable thermal conductivity values (2.0–4.9W/m.K) to those in the present study [ 26 , 48 , 49 ]. Other commercial products with similar glass-ceramic compositions have dielectric constants between ~ 4 and 5 [ 50 , 51 ].…”

“…It is worth mentioning here that the glass-ceramics were sintered at a lower temperature than commercially produced products with similar thermal and dielectric properties. In addition, the addition of BN and PVA had an apparent impact on the thermal and dielectric properties of the obtained glass-ceramics [ 48 ]. The results indicate that borosilicate glass-ceramics with additives can be potential candidates for LTCC applications.…”

Effect of Al2O3 and ZrO2 Filler Material on the Microstructural, Thermal and Dielectric Properties of Borosilicate Glass-Ceramics

“…Furthermore, glass-ceramics’ excellent heat conductivity and their composites contribute to this result since no Al 2 O 3 or ZrO 2 degradation was detected due to the sintering temperature and preparation techniques used. According to the previous literature, AlN, Si 3 N 4 , SiC, and BN have also been used instead of Al 2 O 3 and ZrO 2 [ 15 , 21 , 23 , 34 ]. However, glass-ceramics with ZrO 2 additives show a more effective way to contribute to composites than Al 2 O 3 by comparing their thermal conductivity values with different glass-ceramic content [ 35 ].…”

Effect of nano aluminum nitride filler on mechanical, thermal, and dielectric properties of the glass/mullite composites for low‐temperature co‐fired ceramic applications

“…In our previous studies 21,22 processing and properties of the (CaO-SiO 2 -Al 2 O 3 -based) glass/mullite and glass/Al 2 O 3 composites for the LTCC applications were investigated as a function of glass (50-60 wt%) and nano h-BN (1-10 wt%) filler contents. Dense mullite/glass (55 wt%) composite with 10 wt% hBN addition was successfully engineered and had optimized dielectric and thermal properties.…”