University of Oulu

Kuzmić, N., Škapin, S. D., Nelo, M., Jantunen, H., & Spreitzer, M. (2023). Room temperature fabrication and post-impregnation of LMO-ST composites: Engineering and modeling of dielectric properties. In Open Ceramics (Vol. 16, p. 100495). Elsevier BV.

Room temperature fabrication and post-impregnation of LMO-ST composites : engineering and modeling of dielectric properties

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Author: Kuzmić, Nina1,2; Škapin, Srečo Davor1; Nelo, Mikko3;
Organizations: 1Advanced Materials Department, Jožef Stefan Institute, Ljubljana, Slovenia
2Jožef Stefan International Postgraduate School, Ljubljana, Slovenia
3Microelectronics Research Unit, University of Oulu, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 6.2 MB)
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Language: English
Published: Elsevier, 2023
Publish Date: 2023-10-30


In this work, the effect of changing the Li2MoO4-SrTiO3 (LMO-ST) compositional proportion (1–100 wt%) on the microstructure, dielectric properties, and relative density of LMO-ST composites fabricated at room temperature was investigated. The results showed that increasing the LMO binder content resulted in a higher relative density (up to 93%), but a lower dielectric constant in the range of 75 to 5. Good agreement between the experimental results and the predicted values of relative permittivity was obtained using the Lichtenecker model, reformulated for a three-phase composite system. Modeling further explained the detrimental effects of porosity on the dielectric properties. To address this issue, impregnation with titanium (IV) isopropoxide (TTIP) was found to reduce overall porosity and improve relative permittivity from 72 to 99 at 1 MHz. The room temperature fabrication offers a wide range of relative permittivity for LMO-ST composites.

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Series: Open ceramics
ISSN: 2666-5395
ISSN-L: 2666-5395
Volume: 16
Article number: 100495
DOI: 10.1016/j.oceram.2023.100495
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: Authors gratefully acknowledge the financial support from the Slovenian Research and Innovation Agency (ARIS); PR-09775, P2-0091, J1-3026: “Applicability of the cold sintering process to clay minerals”. In addition, N.K. would like to thank the Journal of European Ceramic Society Trust (2019225) for a working visit of Nina Kuzmi´c at Micro- electronic Research Unit, University of Oulu. Author M.N. acknowledges Infotech Oulu for financial support.
Copyright information: © 2023 Authors. Published by Elsevier Ltd on behalf of European Ceramic Society. This is an open access article under the CC BY-NC-ND license (