. 2025 Sep 17;13:1681282. doi: 10.3389/fchem.2025.1681282

TABLE 2.

Dielectric loss tangent (tan δ) of microwave receptor.

Material	Temperature (°C)	Frequency (GHz)	Dielectric properties			References
Material	Temperature (°C)	Frequency (GHz)	ε′	ε″	tan δ	References
Silicon carbide	25	3	N/A	N/A	0.58	Westphal, 2025
Silicon carbide	20	2.45	13.7	6	0.437	Meredith (1998)
Pt/C	20	2.54	N/A	N/A	<0.27	Gangurde et al. (2017)
Pt/C	850	2.54	N/A	N/A	<0.4	Gangurde et al. (2017)
C–SiO₂	25	2.54	13.7	6	0.437	Hamzehlouia et al. (2018)
C–SiO₂	>800	2.54	<15	12	>0.8	Hamzehlouia et al. (2018)
Zinc oxide	25	2.54	3	3	1	Durka et al. (2009)
Zirconium oxide	25	2.54	20	2	0.1	Durka et al. (2009)

*N/A = not available in the reference.