Low temperature sintering and microwave dielectric properties of Zn0.5Ti0.5NbO4 ceramics with ZnO additive for LTCC applications

Tseng, Ching‐Fang; Chen, Po-Hsien; Lin, Po‐An

doi:10.1016/j.jallcom.2015.01.280

Cited by 23 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…19 Oxides with a low-melting point were also used as sintering aids in LTCC, including ZnO, CuO, and B 2 O 3 . [20][21][22] Nevertheless, both glass and low-melting-point oxides had some adverse effects in LTCC application, including the evaporation of low-melting-point oxides at high temperature 23 and high dielectric loss of the glass phase. 24 The dielectric loss of most commercial LTCC materials was so high that commercially used LTCC materials were unfit for high-frequency applications.…”

Section: Introductionmentioning

confidence: 99%

Low‐temperature‐sintered MgO‐based microwave dielectric ceramics with ultralow loss and high thermal conductivity

Zhao

Chen

et al. 2022

J Am Ceram Soc.

View full text Add to dashboard Cite

With the development of 5G/6G communication, the requirements of portable devices for miniaturization and multifunction make low‐temperature co‐fired ceramic (LTCC) more and more important. In the area of high‐frequency high‐density passive integration, microwave dielectric ceramics with a low dielectric loss and high thermal conductivity are urgently needed to ensure the effective signals transmission and system reliability. However, most microwave dielectric ceramics with a low dielectric loss were not applicable for the LTCC technology due to the high sintering temperature. In this work, a series of MgO‐based ceramics [(100 − x) wt.% MgO–x wt.% (0.2SrF2–0.8LiF) (x = 5,7,10)] were prepared by solid‐state reaction method. The addition of sintering aid 0.2SrF2–0.8LiF (S2L8) decreased the sintering temperature below 880°C without degrading the microwave dielectric properties of ceramics. Microwave dielectric properties of ceramics, including quality factor Q × f, relative permittivity εr, and temperature coefficient of resonant frequency τf, were investigated to find the optimum composition and sintering temperature. In general, MgO–7 wt.% S2L8 ceramic sintered at 860°C exhibits outstanding properties of Q × f = 180 233 GHz, εr = 9.11, τf = −40.33 ppm/°C, and a high thermal conductivity of 24.02 W/(m K). This series of ceramics are suitable to be co‐fired with Ag electrodes. With all those great properties, this series of MgO‐based ceramics are expected to be the candidates for LTCC applications in 5G/6G technology.

show abstract

Section: Introductionmentioning

confidence: 99%

Low‐temperature‐sintered MgO‐based microwave dielectric ceramics with ultralow loss and high thermal conductivity

Zhao

Chen

et al. 2022

J Am Ceram Soc.

View full text Add to dashboard Cite

show abstract

“…The addition of oxides with low melting point into matrix materials is a classic method to reduce the sintering temperature. Zhou used BaCu(B 2 O 5 ) and decreased the temperature of ZTN to 950°C, but the formation of second phase ZnNb 2 O 6 (ε r ~ 25.1) will decrease the dielectric constant according to the mixture rule, Li prepared ZTN ceramics at 875°C with Li 2 O‐ZnO‐B 2 O 3 glass, where the ZnNb 2 O 6 phase is also detected, Tseng lowered the sintering temperature to 920°C,using ZnO, however, the ZnO phase coexisted with ZTN, it also has a negative effect on the dielectric constant and Qxf value . Among these research methods, the appearance of secondary phase is not beneficial to the development of dielectric properties, besides, low temperature sintering behavior of glass additives on the ceramic is not fully elaborated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Zn_0.5Ti_0.5NbO₄ microwave dielectric ceramics with Li₂O‐B₂O₃‐SiO₂ glass for LTCC application

Zhang

2017

Int J of Appl Glass Sci

View full text Add to dashboard Cite

Single phase of dense ixiolite structure Zn0.5Ti0.5NbO4 (ZTN) microwave dielectric ceramics were synthesized at low temperature (850°C‐900°C) via solid state reaction with small amount of Li2O‐B2O3‐SiO2 (LBS) glass. There is a liquid phase generated by LBS at about 760°C, which significantly enhances the shrinkage and decreases the activation energy. And with the assistance of liquid phase, single phase of ZTN with orthorhombic structure is detected, sintering temperature of ceramics drops from 1125°C to 850°C and still maintain high relative density (>97%) with great microwave dielectric properties (εr ~ 34.32, Q×f ~ 17740 GHz). Ceramics with 0.5 wt. % LBS cannot be sintered and densified, and the lack of densification determines a lower dielectric constant, large dielectric loss, and undetectability of temperature coefficient of resonant frequency. With the increase in LBS, a dense structure can be formed, but the deterioration of performance should be mainly attributed to the variation in LBS glass content.

show abstract

“…One of the major requirements for these materials is sinterability below the Ag/Cu metallization melting temperature (&960°C) [1][2][3]. Zinc titanate (ZnTiO 3 ) is a promising candidate for low temperature sintering dielectrics, because it can be sintered at 1100°C without sintering aids and can be well sintered at temperature \900°C with B 2 O 3 glass [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of copper vanadate sintering aid on the microstructure and dielectric properties of (Zn, Mg)TiO3 ceramics

Liu

Chenguang

2016

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Copper vanadate compounds (abbreviated to CVO) were synthesized to accelerate the sinterability of (Zn 0.7 Mg 0.3 )TiO 3 ceramics (abbreviated to ZMT). CVOdoped ZMT ceramics were prepared by a conventional mixed-oxide method. The phase structure, morphology and dielectric properties of ceramics were investigated. The results show that ZMT ceramics with 0.2 wt% CVO addition can be well sintered to approach 98 % theoretical density at 950°C. At the same time, CVO addition inhibits the exaggerated grain growth and improves morphology of ceramics samples effectively. 0.2 wt% CVO doped ZMT ceramics sintered at 950°C exhibits good microwave dielectric properties of e r = 22 and Q 9 f = 11,700 GHz. Due to their good dielectric properties, low firing characteristics, 0.2 wt% CVO doped ZMT ceramics can serve as the promising high-frequency dielectric capacitor requiring low sintering temperature.

show abstract

Low temperature sintering and microwave dielectric properties of Zn0.5Ti0.5NbO4 ceramics with ZnO additive for LTCC applications

Cited by 23 publications

References 19 publications

Low‐temperature‐sintered MgO‐based microwave dielectric ceramics with ultralow loss and high thermal conductivity

Low‐temperature‐sintered MgO‐based microwave dielectric ceramics with ultralow loss and high thermal conductivity

Synthesis of Zn_0.5Ti_0.5NbO₄ microwave dielectric ceramics with Li₂O‐B₂O₃‐SiO₂ glass for LTCC application

Effect of copper vanadate sintering aid on the microstructure and dielectric properties of (Zn, Mg)TiO3 ceramics

Contact Info

Product

Resources

About

Low temperature sintering and microwave dielectric properties of Zn0.5Ti0.5NbO4 ceramics with ZnO additive for LTCC applications

Cited by 23 publications

References 19 publications

Low‐temperature‐sintered MgO‐based microwave dielectric ceramics with ultralow loss and high thermal conductivity

Low‐temperature‐sintered MgO‐based microwave dielectric ceramics with ultralow loss and high thermal conductivity

Synthesis of Zn0.5Ti0.5NbO4 microwave dielectric ceramics with Li2O‐B2O3‐SiO2 glass for LTCC application

Effect of copper vanadate sintering aid on the microstructure and dielectric properties of (Zn, Mg)TiO3 ceramics

Contact Info

Product

Resources

About

Synthesis of Zn_0.5Ti_0.5NbO₄ microwave dielectric ceramics with Li₂O‐B₂O₃‐SiO₂ glass for LTCC application