Fabrication of lead-free low melting temperature TeO2-V2O5-CuO glasses and wetting behavior on AlN ceramic substrate

• Published in: Journal of the European Ceramic Society Vol. 40; no. 15; pp. 5991 - 6001
• Main Authors: Chen, Yuchang, Shi, Ying, Xie, Jianjun, Lei, Fang, Fan, Lingcong, Zhang, Lei
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-12-2020
• Subjects: AlN ceramic substrate; Low melting temperature; Microstructure; Vanadate glass; Wetting behavior; Low melting temperature; Vanadate glass; Wetting behavior; Microstructure; AlN ceramic substrate
• ISSN: 0955-2219; 1873-619X
• DOI: 10.1016/j.jeurceramsoc.2020.07.015

The fabrication of novel TeO2-V2O5-CuO ternary glasses has been investigated. The structural role of V2O5 on thermal properties of glass has been explored through Fourier transformed infrared spectra and X-ray diffraction methods. Glass transition temperatures and softening temperatures of as fabricated TeO2-V2O5-CuO ternary glasses were determined by differential scanning calorimeter, reaching minimum value of 296 °C and 310 °C under the corresponding chemical composition with 15 mol% V2O5. As the V2O5/CuO content ratio decreased, thermal expansion coefficient increased from 9.85 × 10−6 K−1 to 10.9 × 10−6 K−1. The valence states of elements have been determined by X-ray Photoelectron Spectroscopy. The practical sealing property of the glasses was characterized by the contact angles on AlN substrates, which declined drastically from 124° to 34° under temperature of 510°C by increasing CuO concentration. The structural and thermal properties as well as wetting behavior make this TeO2-V2O5-CuO ternary glasses a potential candidate to be applied in electronics package.