Effect of Zn2+ substitution on the microwave dielectric properties of LiMgPO4 and the development of a new temperature stable glass free LTCC

Low‐Temperature Sinterable (1−x)Ba3(VO4)2–xLiMg0.9Zn0.1PO4 Microwave Dielectric Ceramics

“…reported that LiMgPO 4 sintered at ~950°C exhibits a low‐permittivity ε r of ~6.6, a high Q u × f of 79100 GHz, and a τ f value of −55 ppm/°C . Its quality factor could be further boosted when 10% Zn 2+ was substituted for Mg 2+ ( Q u × f = 99 700 GHz), however, its τ f value became more negative (−60 ppm/°C) . The similar ionic radius between Mg 2+ (0.72 Å, CN = 6) and Zn 2+ (0.74 Å, CN = 6) would make Zn 2+ solute into the crystal structure of LiMgPO 4 to a certain degree.…”

Casting and characterization of LiMgPO4 glass free LTCC tape for microwave applications

“…6 Some glass free ceramics have also been reported for LTCC applications. [7][8][9][10][11][12][13][14][15] In our previous work we reported the microwave dielectric properties of LiMgPO 4 ceramic which can be sintered at 950 • C without any glass addition. 14 The LiMgPO 4 ceramic has good microwave dielectric properties: ε r = 6.6, Q u × f = 79,100 GHz and τ f = −55 ppm/ • C. The ceramic is also chemically compatible with Ag.…”

Sintering behavior and dielectric properties of SrB2Si2O8 ceramics

“…Consequently, it should be considered by choosing more convenient methods to improve the preparation process to achieve an energy-saving LTCC preparation process. At present, there are some multiple oxide compositions with a melting temperature below 1,000°C [5][6][7][8][9][10] [11,12], but a very little research concerned on the sintering behaviors and the electric properties of the SrB 2 Si 2 O 8 ceramics. The objective of the work is to discuss the sintering behavior of the SrO-B 2 O 3 -SiO 2 ceramics and its dielectric properties so that it can be developed for the possible application in the LTCC technologies.…”