Preparation of lead-free low-melting glass and its slurry for vacuum glass packaging

Zhang, Ping; Li, Hong; Xu, Xujia; Zhuo, Yong; Liu, Zirui

doi:10.1109/icept.2016.7583189

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…In this study, V 2 O 5 -P 2 O 5 -TeO 2 low-melting glass is chosen as the edge seal material based on the early research of our group. 19 This glass has expansion coefficient of 83.5 × 10 −7 /°C, which is close to that of glass sheet; low glass transition temperature of 339.3°C; and sealing temperature between 430°C and 470°C. These properties make the V 2 O 5 -P 2 O 5 -TeO 2 low-melting glass perfect to be the sealant of vacuum gap of vacuum glazing.…”

Section: Introductionmentioning

confidence: 55%

“…Therefore, the thermal expansion coefficient of solder glass must match the plane sheet. In this study, V 2 O 5 ‐P 2 O 5 ‐TeO 2 low‐melting glass is chosen as the edge seal material based on the early research of our group . This glass has expansion coefficient of 83.5 × 10 −7 /°C, which is close to that of glass sheet; low glass transition temperature of 339.3°C; and sealing temperature between 430°C and 470°C.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced vacuum glazing bonding strength by anodic bonding‐assisted sealing method

Chen

Zhang

et al. 2019

Int J of Appl Glass Sci

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A novel sealing method of vacuum glazing is introduced in this study. Anodic bonding technology was used to enhance the bonding strength of the sealant of vacuum glazing. Two sheets of plane glass were sealed by V2O5‐P2O5‐TeO2 glass powder with low glass transition temperature (339.3℃) using anodic bonding‐assisted low‐temperature sintering. Through analyzing the results of Shear Strength test, the diagram of microstructures of the sealing bond taken by a micro Super‐depth Microscopy, Scanning Electron Microscope (SEM), and Energy Dispersive Spectrometer (EDS), the best bonding treatment schedule was determined for achieving the strongest bond. The experiment results show that anodic bonding has a dramatic influence on bonding performance. When the sealing temperature and bonding time are kept constant, the shear strength of the sample increases by increasing the bonding voltage. With the bonding temperature of 470℃ and the voltage of 600 V, the air tightness of the sealed sample is 3.9 × 10−9 Pa·m3/s. The improved bonding strength can enhance life‐time of vacuum glazing.

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Section: Introductionmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Enhanced vacuum glazing bonding strength by anodic bonding‐assisted sealing method

Chen

Zhang

et al. 2019

Int J of Appl Glass Sci

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“…Shear strength reflects the bonding between low‐melting glass and glass substrates, is vital to the lifecycle of vacuum glazing. Based on our previous work, 42 the main process parameters of anodic‐bonding refer to bonding temperature, bonding time and bonding voltage. To optimize process parameters, vacuum glazing samples were divided into three groups: T1–T8 (samples sealed at different temperatures), t1–t8 (samples sealed for different times), and V1–V14 (samples sealed under different voltages).…”

Section: Resultsmentioning

confidence: 99%

“…Lu first adopted anodic‐bonding technique to seal the vacuum gap using In‐Sn alloy solder for fabrication of vacuum glazing 41 . Very recently, we reported the low‐melting glasses of V 2 O 5 –P 2 O 5 –TeO 2 42–43 and V 2 O 5 –P 2 O 5 –B 2 O 3 44 system were chosen as the edge sealing material for the fabrication of vacuum glazing, and the enhanced sealing performance with the assistance of anodic‐bonding method was investigated.…”

Section: Introductionmentioning

confidence: 99%

Glass forming region and bonding mechanism of low‐melting V₂O₅–TeO₂–Bi₂O₃ glass applied in vacuum glazing sealing

Chen

et al. 2021

J Am Ceram Soc

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As a new kind of energy-saving glass, vacuum glazing has excellent thermal and sound insulation properties and is widely used in building, household appliances and solar photovoltaic. The edge sealing material, along with sealing method, is key to the fabrication of vacuum glazing. Low transition temperature (T g ) and good fluidity at sealing temperature (T s ) make low-melting glass of V 2 O 5 -TeO 2 -Bi 2 O 3 (VTB) system perfect to be the edge sealing material for vacuum glazing. The glass forming region of VTB ternary system was mapped for the first time in this work. Low-melting VTB glass of 40V 2 O 5 -50TeO 2 -5Bi 2 O 3 -3ZnO-2Na 2 O (wt%) was optimized to be the sealing material. Glass powder of this composition could be used to seal the edges of vacuum glazing at an extremely low temperature of 360°C. With the assistance of anodic-bonding method, the bonding strength of vacuum glazing was dramatically enhanced. Vacuum glazing fabricated under the optimized process parameters of 420°C, 600 V, and 60 min possesses a highest bonding strength of 4.31 MPa. Furthermore, anodic-bonding mechanism of low-melting VTB glass applied in vacuum glazing sealing has been thoroughly researched. K E Y W O R D S anodic-bonding, glass, glass forming region, glass transition, lead-free glass, low-melting glass, V 2 O 5 -TeO 2 -Bi 2 O 3 (VTB), vacuum glazing F I G U R E 2 The edge sealing processes of vacuum glazing, (A) printing of multilayer coating, (B) drying the sample to make organic solvent evaporated, (C) sealing the sample in an anodic-bonding furnace [Color figure can be viewed at wileyonlinelibrary.com] How to cite this article: Li H, Yu H, Chen P, et al. Glass forming region and bonding mechanism of low-melting V 2 O 5 -TeO 2 -Bi 2 O 3 glass applied in vacuum glazing sealing.

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Synergistic effect of V2O5 and Bi2O3 on the grain boundary structure of high-frequency NiCuZn ferrite ceramics

et al. 2022

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High-frequency soft magnetic ferrite ceramics are desired in miniaturized and efficient power electronics but remain extremely challenging to deploy on account of the power loss (Pcv) at megahertz frequencies. Here, we prepared NiCuZn ferrite with superior high-frequency properties by V2O5 and Bi2O3 synergistic doping, which proves to be a potent pathway to reduce Pcv of the ferrite at megahertz frequencies. The sample doped with 800 ppm V2O5 and 800 ppm Bi2O3 yielded the most optimized magnetic properties with a Pcv of 113 kW/m3 (10 MHz, 5 mT, 25 °C), an initial permeability (μi) of 89, and a saturation induction (Bs) of 340 mT, which is at the forefront of the reported results. These outstanding properties are closely related to the notable grain boundary structure, which features a new type of nano-Bi2Fe4O9 phase around ferrite grains and a Ca/Si/V/O amorphous layer. Our results indicate great strides in correlating the grain boundary structure with multiple-ion doping and set the scene for the developing high-frequency soft magnet ferrites.

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Preparation of lead-free low-melting glass and its slurry for vacuum glass packaging

Cited by 3 publications

References 6 publications

Enhanced vacuum glazing bonding strength by anodic bonding‐assisted sealing method

Enhanced vacuum glazing bonding strength by anodic bonding‐assisted sealing method

Glass forming region and bonding mechanism of low‐melting V₂O₅–TeO₂–Bi₂O₃ glass applied in vacuum glazing sealing

Synergistic effect of V2O5 and Bi2O3 on the grain boundary structure of high-frequency NiCuZn ferrite ceramics

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Preparation of lead-free low-melting glass and its slurry for vacuum glass packaging

Cited by 3 publications

References 6 publications

Enhanced vacuum glazing bonding strength by anodic bonding‐assisted sealing method

Enhanced vacuum glazing bonding strength by anodic bonding‐assisted sealing method

Glass forming region and bonding mechanism of low‐melting V2O5–TeO2–Bi2O3 glass applied in vacuum glazing sealing

Synergistic effect of V2O5 and Bi2O3 on the grain boundary structure of high-frequency NiCuZn ferrite ceramics

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Glass forming region and bonding mechanism of low‐melting V₂O₅–TeO₂–Bi₂O₃ glass applied in vacuum glazing sealing