High-Q×f 0.95 MgTiO3–0.05CaTiO3 microwave dielectric ceramics with the addition of LiF sintered at medium temperatures

Yuan, Shifeng; Gan, Lin; Ning, Fanfan; An, Shaobo; Jiang, Juan; Zhang, Tianjin

doi:10.1016/j.ceramint.2018.07.202

Cited by 24 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The microwave dielectric properties of two phase materials generally obey the mixing rules:

\ln ε_{normalr} = v_{1} \ln ε_{1} + v_{2} \ln ε_{2},

Q^{- 1} = v_{1} Q_{1}^{- 1} + v_{2} Q_{2}^{- 1},

τ_{f} = v_{1} τ_{f 1} + v_{2} τ_{f 2},

v_{1} + v_{2} = 1,

where v 1 and v 2 represent the volume fraction of the components. According previous study of CaTiO 3 ceramic, it has the trait of high ε r , low Q × f , and large τ f value . This character of the CaTiO 3 ceramic increases ε r and τ f and decreases the Q × f of (1 − y ) LiAl 5 O 8 + y CaTiO 3 ( y = 0.02‐0.08) ceramics with the increase in y (Table ).…”

Section: Resultsmentioning

confidence: 64%

See 1 more Smart Citation

Phase evolution and microwave dielectric properties of novel LiAl₅₋_xZn_xO_8−0.5_x‐based (0 ≤ x ≤ 0.5) ceramics

Lan

et al. 2019

J Am Ceram Soc

View full text Add to dashboard Cite

Novel LiAl5−xZnxO8−0.5x microwave dielectric ceramics were synthesized through a solid‐state reaction route. Phase evolution of LiAl5−xZnxO8−0.5x was determined by XRD analysis. The XRD results indicated that the phase compositions had a P4332 space group when 0 ≤ x ≤ 0.2 and a spinel structure when 0.3 ≤ x ≤ 0.5. The dielectric constant (εr) of this series’ solid solutions decreased with the increase in Zn doping content, which was in good agreement with the Clausius‐Mossotti relation. Oxygen vacancy and the decreased degree of order degraded the quality factor (Q × f) of the two structures. The deterioration in quality factor was further verified by impedance spectroscopy. The temperature coefficient of the resonant frequency (τf) decreased with the increase in x and was correlated with the unit cell volume. Finally, CaTiO3 was used as a compensation material to obtain a near‐zero τf of the LiAl5O8 ceramic.

show abstract

“…The microwave dielectric properties of two phase materials generally obey the mixing rules:

\ln ε_{normalr} = v_{1} \ln ε_{1} + v_{2} \ln ε_{2},

Q^{- 1} = v_{1} Q_{1}^{- 1} + v_{2} Q_{2}^{- 1},

τ_{f} = v_{1} τ_{f 1} + v_{2} τ_{f 2},

v_{1} + v_{2} = 1,

Section: Resultsmentioning

confidence: 64%

“…According previous study of CaTiO 3 ceramic, it has the trait of high ε r , low Q × f, and large τ f value. 30,31 This character of the CaTiO 3 ceramic increases ε r and τ f and decreases the Q × f of (1 − y) LiAl 5 O 8 + y CaTiO 3 (y = 0.02-0.08) ceramics with the increase in y ( Table 5).…”

Section: Resultsmentioning

confidence: 94%

Phase evolution and microwave dielectric properties of novel LiAl₅₋_xZn_xO_8−0.5_x‐based (0 ≤ x ≤ 0.5) ceramics

Lan

et al. 2019

J Am Ceram Soc

View full text Add to dashboard Cite

show abstract

“…Figure 1 shows the XRD patterns of (1−x) LiAl 0.98 (Zn 0.5 Si 0.5 ) 0.02 O 2 + x CaTiO 3 (x = 0.05-0.20) ceramics sintered in air at 1150°C for 6 hours. 23,24 This feature of the CaTiO 3 material led to the increase in ε r On the basis of the profile intensity of the sample x = 0.05, Figure 1A reveals that the LiAlO 2 phase is a major phase accompanied by a minor CaTiO 3 phase.…”

Section: Methodsmentioning

confidence: 96%

“…As we know, the CaTiO 3 microwave dielectric ceramic possesses high ε r , low Q × f and large τ f values. 23,24 This feature of the CaTiO 3 material led to the increase in ε r…”

Section: Methodsmentioning

confidence: 99%

A novel low‐permittivity LiAl_0.98(Zn_0.5Si_0.5)_0.02O₂‐based microwave dielectric ceramics for LTCC application

Lan

Wang

et al. 2019

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

Phase composition, morphology, and microwave dielectric properties of (1−x) LiAl 0.98 (Zn 0.5 Si 0.5 ) 0.02 O 2 + x CaTiO 3 (0.05 ≤ x ≤ 0.20) materials synthesized via the solid state reaction method were investigated. All these densified materials were obtained at a sintering temperature of 1150°C. All compositions showed a major LiAlO 2 phase that was accompanied by a minor CaTiO 3 phase. The ε r value increased gradually from 10.88 to 11.60, whereas the Q × f value remarkably decreased from 33 251 GHz to 13 511 GHz. The τ f value changes from −85 ppm/°C to 212 ppm/°C, thereby indicating that CaTiO 3 could effectively adjust this value. HBO 3 -doping was used to further decrease the sintering temperature to 900°C. The optimum value was obtained at 7 wt.% HBO 3 doped with microwave dielectric properties of ε r = 9.39, Q × f = 10 224 GHz, and τ f = −7.8 ppm/°C. This material also exhibited chemical compatibility with silver, making it a candidate for low temperature co-fired ceramics applications. K E Y W O R D S dielectric materials/properties, electroceramics, low temperature How to cite this article: Lan X-K, Li J, Wang F, et al. A novel low-permittivity LiAl 0.98 (Zn 0.5 Si 0.5 ) 0.02 O 2based microwave dielectric ceramics for LTCC application. Int J Appl Ceram Technol. 2020;17:745-750. https ://doi.

show abstract

“…Jiang et al. lowered the sintering temperature to 1150 °C by adding 2 wt % LiF in 0.95MgTiO 3 ‐0.05CaTiO 3 , but the τ f value was still large (−18.8 ppm/°C) [7] . Peng et al.…”

Section: Introductionmentioning

confidence: 99%

Microwave Dielectric Properties and Sintering Behavior of K20 Series Temperature‐Stable 0.91MgTiO₃‐0.09(Ca_0.8Na_0.1Ce_0.1)TiO₃ Composite Ceramics

Tao

et al. 2021

Eur J Inorg Chem

View full text Add to dashboard Cite

Recently, the progress of miniaturization and integration for dielectric communication devices is being motivated by the rapidly‐developed communication technology. Microwave dielectric ceramics, the foundation of dielectric communication devices, have been receiving great attention. In this study, 0.91MgTiO3‐0.09(Ca0.8Na0.1Ce0.1)TiO3 ceramic (0.91MT‐0.09CNCT) was synthesized by the traditional solid‐phase process to tune the temperature coefficient of resonant frequency (τf) to zero. Compared with 0.95MgTiO3–0.05CaTiO3 ceramic, a Q×f value increased by 15 % was achieved in 0.91MT‐0.09CNCT ceramic, meanwhile, the sintering temperature of which was significantly lowered by 225 °C. In general, the τf value is related to the (Ca0.8Na0.1Ce0.1)TiO3 content and sintering temperature. At the same time, the 0.91MT‐0.09CNCT ceramic sintered at 1175 °C has competitive dielectric properties: ϵr=20.4, Q×f=66,000 GHz, τf=0.2 ppm/°C, which suggests it a promising candidate for dielectric communication devices with low cost and green synthesis.

show abstract

High-Q×f 0.95 MgTiO3–0.05CaTiO3 microwave dielectric ceramics with the addition of LiF sintered at medium temperatures

Cited by 24 publications

References 12 publications

Phase evolution and microwave dielectric properties of novel LiAl₅₋_xZn_xO_8−0.5_x‐based (0 ≤ x ≤ 0.5) ceramics

Phase evolution and microwave dielectric properties of novel LiAl₅₋_xZn_xO_8−0.5_x‐based (0 ≤ x ≤ 0.5) ceramics

A novel low‐permittivity LiAl_0.98(Zn_0.5Si_0.5)_0.02O₂‐based microwave dielectric ceramics for LTCC application

Microwave Dielectric Properties and Sintering Behavior of K20 Series Temperature‐Stable 0.91MgTiO₃‐0.09(Ca_0.8Na_0.1Ce_0.1)TiO₃ Composite Ceramics

Contact Info

Product

Resources

About

High-Q×f 0.95 MgTiO3–0.05CaTiO3 microwave dielectric ceramics with the addition of LiF sintered at medium temperatures

Cited by 24 publications

References 12 publications

Phase evolution and microwave dielectric properties of novel LiAl5−xZnxO8−0.5x‐based (0 ≤ x ≤ 0.5) ceramics

Phase evolution and microwave dielectric properties of novel LiAl5−xZnxO8−0.5x‐based (0 ≤ x ≤ 0.5) ceramics

A novel low‐permittivity LiAl0.98(Zn0.5Si0.5)0.02O2‐based microwave dielectric ceramics for LTCC application

Microwave Dielectric Properties and Sintering Behavior of K20 Series Temperature‐Stable 0.91MgTiO3‐0.09(Ca0.8Na0.1Ce0.1)TiO3 Composite Ceramics

Contact Info

Product

Resources

About

Phase evolution and microwave dielectric properties of novel LiAl₅₋_xZn_xO_8−0.5_x‐based (0 ≤ x ≤ 0.5) ceramics

Phase evolution and microwave dielectric properties of novel LiAl₅₋_xZn_xO_8−0.5_x‐based (0 ≤ x ≤ 0.5) ceramics

A novel low‐permittivity LiAl_0.98(Zn_0.5Si_0.5)_0.02O₂‐based microwave dielectric ceramics for LTCC application

Microwave Dielectric Properties and Sintering Behavior of K20 Series Temperature‐Stable 0.91MgTiO₃‐0.09(Ca_0.8Na_0.1Ce_0.1)TiO₃ Composite Ceramics