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Journal of Materials Science

, Volume 44, Issue 13, pp 3349–3355 | Cite as

The effect of NiO on the phase formation, thermo-physical properties and sealing behaviour of lithium zinc silicate glass–ceramics

  • Rakesh Kumar
  • A. Arvind
  • M. Goswami
  • S. Bhattacharya
  • V. K. Shrikhande
  • G. P. KothiyalEmail author
Article

Abstract

We have prepared lithium zinc silicate (LZS) glasses of compositions (mol%) 17.83Li2O–17.73ZnO–(53.52 − x)SiO2–5.25Na2O–1.25P2O5–4.31B2O3–x-NiO, where 0.5 ≤ x ≤ 2.0, by the melt quench technique. The effect of NiO on the phase formation, thermo-physical properties and sealing behaviour of LZS glass–ceramics was studied using X-Ray diffraction (XRD), thermo-mechanical analysis (TMA) and microhardness (MH) measurements. It is found that NiO incorporation leads to a change in the role of ZnO from network modifier to intermediate oxide. The intermediate network forming Zn2+ ions would find it more difficult to diffuse and initiate the transformation of Li3Zn0.5SiO4 to Li2ZnSiO4. Thus Li3Zn0.5SiO4 is formed instead of Li2ZnSiO4 on addition of 2 mol% NiO. Scanning electron microscopy (SEM) and energy dispersive analysis of X-rays (EDAX) measurements at the glass–ceramic-to-metal interface reveal a change in the microstructure commensurate with the changing role of ZnO. Addition of NiO favoured interdiffusion of species at the interface leading to better sealing.

Keywords

Thermal Expansion Coefficient Cristobalite Glass Powder Crystallization Peak Temperature Parent Glass 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgement

The authors wish to thank Dr. Sinha and Dr. Purohit for providing XRD facility.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Rakesh Kumar
    • 1
  • A. Arvind
    • 1
  • M. Goswami
    • 1
  • S. Bhattacharya
    • 1
  • V. K. Shrikhande
    • 1
  • G. P. Kothiyal
    • 1
    Email author
  1. 1.Technical Physics and Prototype Engineering DivisionBhabha Atomic Research CentreMumbaiIndia

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