Crystal structure, dielectric properties, and far-infrared reflectivity spectrum of a novel phosphate KBaPO4 ceramic at microwave frequency

Low-permittivity LiLn(PO 3) 4 (Ln = La, Sm, Eu) dielectric ceramics for microwave/millimeter-wave communication

“…The large deviation (20%-23%) between ε r and ε th may be due to the strong covalency of the P-O bond, which can be found in other phosphates [11,17]. Notably, ε r of the LiLn(PO 3 ) 4 ceramics remains stable at approximately 5.10, which is lower than that of the majority of phosphates, such as A 2 P 2 O 7 (A = Ca, Sr, Ba, Mg, Zn, Mn) [55], LnPO 4 (Ln = La, Ce, Nd, Sm, Tb, Dy, Y, Yb) [17], LiBPO 4 (B = Mg, Ni, Zn, Mn, Ca) [23,[26][27][28]56], A 3 (PO 4 ) 2 (A = Ca, Sr, Ba, Mg, Zn, Ni, Cu) [8], and LiB(PO 3 ) 3 (B = Sr, Ca) [11], which are listed in Table 7. Therefore, LiLn(PO 3 ) 4 ceramics with low ε r exhibit potential applications as substrate materials for high-frequency communication.…”

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

“…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 7,8 . Conversely, a higher quality factor substantially enhances signal frequency selectivity, a critical aspect of efficient signal processing.…”

“…This, in turn, facilitates the use of microwave ceramics with lower relative dielectric constants in high-speed communication equipment. 7,8 Conversely, a higher quality factor substantially enhances signal frequency selectivity, a critical aspect of efficient signal processing. The proximity of the temperature coefficient of resonant frequency to zero plays a pivotal role in curbing zero drift during signal transmission, thereby enhancing signal stability.…”