A novel Li3Mg3NbO7 microwave dielectric ceramic with ultra-low loss

Sintering behavior, crystal structure, and microwave dielectric properties of a novel NaY9Si6O26 ceramic

“…The calculated α D for NaY 9 Si 6 O 26 ceramics is 93.57, resulting in a ε r(theo) value of 10.91 at 1425 • C, closely aligned with the experimental value of 10.42. Additionally, there is a correlation between ε r and porosity (p), as expressed by 29 𝜀 𝑐𝑜𝑟𝑟 = 𝜀 𝑟 (1 + 1.5𝑝) (4) where ε corr represents the corrected ε r value, and p denotes the fractional porosity. At the most suitable temperature, NaY 9 Si 6 O 26 ceramics exhibit an ε corr value of 10.97, somewhat higher than the actual value, highlighting the substantial influence of porosity on ε r variation.…”

“…1,2 Notably, the pursuit of microwave dielectric ceramics possessing specific attributes such as an optimal relative dielectric constant (ε r ), a high-quality factor (Q × f), and a near-zero temperature coefficient of resonant frequency (τ f ) has gained paramount significance. [3][4][5][6] A lower relative dielectric constant holds the promise of reducing signal transmission delays, thereby mitigating heat generation within the system. This, in turn, facilitates the use of microwave ceramics with lower relative dielectric constants in high-speed communication equipment.…”