Al2O3 dielectric ceramic tapes containing hBN for applications on high-frequency substrates

In this study, we manufactured dielectric alumina (Al2O3) ceramic tapes incorporated with hexagonal boron nitride (hBN) for applications on high-frequency substrates. The ceramic tapes were produced using the tape casting technique. Structural and morphological analyzes show the presence of hBN nanoplatelets dispersed in the Al2O3 matrix, confirming the efficiency of the tape-casting technique and the sintering process. We verified that the crystalline structure of hBN is essential in the dielectric response, showing a reduction in dielectric losses with the incorporation of hBN into the Al2O3 ceramic matrix, making ceramic tapes attractive in dielectric applications. Furthermore, the mechanical properties of the tapes show satisfactory results, reinforcing our findings. Thus, our results become fascinating for applications in high-frequency substrates for electronic transmission devices.