Sintering and crystallization of cordierite glass ceramics for high frequency multilayer chip inductors

Sintering, crystallization, and properties of CaO doped cordierite-based glass–ceramics

“…By increasing temperature to 900 • C, the relative density of the sample C5 has reached a maximum value of 98.5%, and the relative density of the sample C10 slightly decreases. When sintering temperature exceeds 900 • C, the relative density of samples C5 and C10 obviously decrease, which is thought to be overheated [17]. It was observed that other samples had not reached full densification though the sintering temperature reached 950 • C.…”

Study on magnetic properties of low temperature sintering M-Barium hexaferrites

“…Our results show that 3 density, all of which make the material potential for applications such as self-bias multilayer chip circulators/isolators and microwave passive integrated. Restricted by the measurement conditions, microwave properties such as ferromagnetic resonance line width, dielectric properties, etc.…”

“…From Fig. 3͑b͒, the grain size increases to 1 m with the density of the sample reaching 4.85 g / cm 3 , which can be attributed to the effects of glass. However, grain growth will be hindered by the glass additive with a relative large weight percents because the excessive glass additive can act as a flux wrapping around the grains of sample and prevent the M-Ba ferrite interparticles from diffusing and transporting.…”

“…For ferrites, the typical materials are NiCuZn and MgCuZn spinel ferrites, which are applied in multilayer chip inductors, beads, and Electro-Magnetic Interference components due to the good soft magnetic performance in high frequency. [1][2][3] Aiming at increasing the working frequency, low temperature sintered Z-type Ba ferrites ͑Co 2 Z͒ have also been studied and are desired to find the same applications such as spinel in radio frequency. [4][5][6] In recent years, a lot of research is focusing on surface mounting devices circulators/isolators fabricated by LTCF process.…”

Crystallization behavior and microwave dielectric property of MgO–Al2O3–SiO2–TiO2–CeO2 glass–ceramic

“…In recent 20 years it has been extensively investigated [4,5]. With the development of wireless telecommunication, dielectric materials with controllable dielectric constant are required in the design of microwave circuit to realize different function.…”