Silver diffusion and mechanism of CaO-MgO-SiO2 glass ceramics in millimeter-wave properties

Feng, Kuei-Chih; Chu, Ming-Wei; Lu, Chun-An; Iizuka, Yoshiyuki; Chen, Pin-Yi; Tu, Chi‐Shun; Chen, Cheng-Sao; Chien, R. R.; Tsao, Chung-Ya

doi:10.1016/j.ceramint.2019.11.007

Cited by 16 publications

(3 citation statements)

References 20 publications

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“…On the other hand, during all thermal aging cycles, once applied silver contacts were used, which were fired into the nearsurface layer after the first cycle. Upon further aging, diffusion of Ag atoms in the intergrain boundaries could occur, which could vary the measured dielectric characteristics in an unpredictable way [48].…”

Section: Acmentioning

confidence: 99%

Study of the effect of synthesis temperature and thermal aging on structural, dielectric properties and phase composition in NiO/NiAl₂O₄ composite ceramics

Shakirzyanov,

Borgekov,

Garanin

et al. 2024

Mater. Res. Express

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In modern materials science, a considerable amount of research is focused on obtaining new ceramic materials to create efficient functional elements. Acquiring highly efficient and highly stable ceramic catalysts for alternative energy is an important task that demands an urgent solution. Addressing this issue promptly is essential as it will facilitate the development of new technologies that can prevent future energy crises. Nickel oxide NiO or spinels of NiAl2O4 composition are excellent candidates as high temperature catalysts used in alternative energy applications. This paper studies the synthesis of NiO/NiAl2O4 composite ceramics and the effect of high-temperature aging on their phase composition, crystalline properties, and dielectric characteristics. The study found that the phase composition and microstructure of the ceramics are unchanged by thermal aging (aged at 700 °C), while the crystalline parameters and low-frequency dielectric characteristics may undergo significant changes over time, exhibiting notable fluctuations depending on the duration of aging. The observed variations were predominantly influenced by the microstructural features of the composite ceramics. As the average grain size increased and the phase transformations were completed, the crystalline parameters and low-frequency dielectric characteristics reached a stable state without further alteration. For NiO/NiAl2O4 ceramics with a sintering temperature of 1500 °C, the highest shrinkage, low dielectric loss values and acceptable hardness were observed, indicating that the fabricated ceramics are suitable for mechanical processing. In general, the obtained composite ceramics show high temperature stability and are ready for use in hydrogen energy applications as functional elements.

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Section: Acmentioning

confidence: 99%

Study of the effect of synthesis temperature and thermal aging on structural, dielectric properties and phase composition in NiO/NiAl₂O₄ composite ceramics

Shakirzyanov,

Borgekov,

Garanin

et al. 2024

Mater. Res. Express

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“…First, with the increase of temperature, the porosity of insulating film decreased (Figure 9), which makes the dielectric constant gradually increase, and the dielectric loss gradually decreased. In addition, at low-temperature, the Ag content in the insulation layer was greater (Figure 8), which worsened its electrical properties [10]. When the temperature increased, there were more crystalline phases in the insulation layer, and the Ag content decreased, which increased the dielectric constant and reduces the dielectric loss.…”

Section: Property Variations Of Insulating Thick Filmsmentioning

confidence: 99%

“…However, Ag, as a conductor in a thick-film multilayer structure, also experiences several challenges. Ag will diffuse into the substrate material, thereby resulting in the degradation of performance [8][9][10]. Glass ceramic is generally used as an insulating material, which can adjust the coefficient of thermal expansion and control crystallization so as to control the diffusion of metal in the interior [4,5].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Glass Insulating Thick Films with Ag Conductors for Multilayer Packages

Fang

et al. 2021

Materials

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In this paper, an insulating film was successfully prepared by sintering 35 wt % CaO-15 wt % Al2O3-10 wt % B2O3-40 wt % SiO2 glass at 875 °C. After sintering, the main component of the insulating film was glass-ceramics. The main crystal phase was CaAl2Si2O8, and the crystallization activation energy was 189.76 kJ/mol. After preparing the insulating film, its color turned yellow, and the diffusion of Ag was found by XPS and XRD data. When the temperature increased to 875 °C, the color of the insulating film became lighter, and the silver content decreased. The adhesion of the multilayer structure could reach 875 N. The dielectric constant of the insulating film in the multilayer structure was approximately 5, and the dielectric loss was 0.0011. After sintering, the dielectric strength of the insulating film could reach 13.11 kV/mm, which fully meets the requirements of a complex packaging structure.

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Thermal Sintering Matchability between Low‐Temperature Cofired Ceramic Substrate and Silver Pastes and the Effect of CuO on Silver Diffusion Inhibition

Xiao,

Zhang,

et al. 2024

Adv Eng Mater

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Low‐temperature co‐fired ceramic(LTCC) materials are a promising material for heat dissipation substrates due to their excellent thermal conductivity and thermal expansion coefficient similar to that of silicon. However, the difficulties in surface metallization techniques limit its application. This work uses Bi‐B‐Si‐Zn‐Al glass/ceramic composite as the substrate and Bi‐B‐Si‐Zn‐Al glass powder as the inorganic binder for silver pastes. The silver thick film with a glass content of 3 wt% is sintered at 800 °C for 30 min, and the samples have excellent electrical conductivity (surface square resistance of 0.29 mΩ/□) and mechanical properties (interface bonding force of 17.56 MPa). In addition, the introduction of CuO into the glass phase can inhibit the silver diffusion phenomenon during the sintering process and improve the conductive performance of the material. The results are beneficial for the preparation and application stability of LTCC devices.This article is protected by copyright. All rights reserved.

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Silver diffusion and mechanism of CaO-MgO-SiO2 glass ceramics in millimeter-wave properties

Cited by 16 publications

References 20 publications

Study of the effect of synthesis temperature and thermal aging on structural, dielectric properties and phase composition in NiO/NiAl₂O₄ composite ceramics

Study of the effect of synthesis temperature and thermal aging on structural, dielectric properties and phase composition in NiO/NiAl₂O₄ composite ceramics

Characterization of Glass Insulating Thick Films with Ag Conductors for Multilayer Packages

Thermal Sintering Matchability between Low‐Temperature Cofired Ceramic Substrate and Silver Pastes and the Effect of CuO on Silver Diffusion Inhibition

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Silver diffusion and mechanism of CaO-MgO-SiO2 glass ceramics in millimeter-wave properties

Cited by 16 publications

References 20 publications

Study of the effect of synthesis temperature and thermal aging on structural, dielectric properties and phase composition in NiO/NiAl2O4 composite ceramics

Study of the effect of synthesis temperature and thermal aging on structural, dielectric properties and phase composition in NiO/NiAl2O4 composite ceramics

Characterization of Glass Insulating Thick Films with Ag Conductors for Multilayer Packages

Thermal Sintering Matchability between Low‐Temperature Cofired Ceramic Substrate and Silver Pastes and the Effect of CuO on Silver Diffusion Inhibition

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Study of the effect of synthesis temperature and thermal aging on structural, dielectric properties and phase composition in NiO/NiAl₂O₄ composite ceramics

Study of the effect of synthesis temperature and thermal aging on structural, dielectric properties and phase composition in NiO/NiAl₂O₄ composite ceramics