Fabrication of transparent lead-free KNN glass ceramics by incorporation method

Fabrication of transparent lead-free KNN glass ceramics by incorporation method

The incorporation method was employed to produce potassium sodium niobate [KNN] (K0.5Na0.5NbO3) glass ceramics from the KNN-SiO2 system. This incorporation method combines a simple mixed-oxide technique for producing KNN powder and a conventional melt-quenching technique to form the resulting glass....

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Main Authors: Yongsiri, Ploypailin, Eitssayeam, Sukum, Rujijanagul, Gobwut, Sirisoonthorn, Somnuk, Tunkasiri, Tawee, Pengpat, Kamonpan
Format: Online
Language:English
Published: Springer 2012
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3297504/
id pubmed-3297504
recordtype oai_dc
spelling pubmed-32975042012-03-09 Fabrication of transparent lead-free KNN glass ceramics by incorporation method Yongsiri, Ploypailin Eitssayeam, Sukum Rujijanagul, Gobwut Sirisoonthorn, Somnuk Tunkasiri, Tawee Pengpat, Kamonpan Nano Express The incorporation method was employed to produce potassium sodium niobate [KNN] (K0.5Na0.5NbO3) glass ceramics from the KNN-SiO2 system. This incorporation method combines a simple mixed-oxide technique for producing KNN powder and a conventional melt-quenching technique to form the resulting glass. KNN was calcined at 800°C and subsequently mixed with SiO2 in the KNN:SiO2 ratio of 75:25 (mol%). The successfully produced optically transparent glass was then subjected to a heat treatment schedule at temperatures ranging from 525°C -575°C for crystallization. All glass ceramics of more than 40% transmittance crystallized into KNN nanocrystals that were rectangular in shape and dispersed well throughout the glass matrix. The crystal size and crystallinity were found to increase with increasing heat treatment temperature, which in turn plays an important role in controlling the properties of the glass ceramics, including physical, optical, and dielectric properties. The transparency of the glass samples decreased with increasing crystal size. The maximum room temperature dielectric constant (εr) was as high as 474 at 10 kHz with an acceptable low loss (tanδ) around 0.02 at 10 kHz. Springer 2012-02-16 /pmc/articles/PMC3297504/ /pubmed/22340426 http://dx.doi.org/10.1186/1556-276X-7-136 Text en Copyright ©2012 Yongsiri et al; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
repository_type Open Access Journal
institution_category Foreign Institution
institution US National Center for Biotechnology Information
building NCBI PubMed
collection Online Access
language English
format Online
author Yongsiri, Ploypailin
Eitssayeam, Sukum
Rujijanagul, Gobwut
Sirisoonthorn, Somnuk
Tunkasiri, Tawee
Pengpat, Kamonpan
spellingShingle Yongsiri, Ploypailin
Eitssayeam, Sukum
Rujijanagul, Gobwut
Sirisoonthorn, Somnuk
Tunkasiri, Tawee
Pengpat, Kamonpan
Fabrication of transparent lead-free KNN glass ceramics by incorporation method
author_facet Yongsiri, Ploypailin
Eitssayeam, Sukum
Rujijanagul, Gobwut
Sirisoonthorn, Somnuk
Tunkasiri, Tawee
Pengpat, Kamonpan
author_sort Yongsiri, Ploypailin
title Fabrication of transparent lead-free KNN glass ceramics by incorporation method
title_short Fabrication of transparent lead-free KNN glass ceramics by incorporation method
title_full Fabrication of transparent lead-free KNN glass ceramics by incorporation method
title_fullStr Fabrication of transparent lead-free KNN glass ceramics by incorporation method
title_full_unstemmed Fabrication of transparent lead-free KNN glass ceramics by incorporation method
title_sort fabrication of transparent lead-free knn glass ceramics by incorporation method
description The incorporation method was employed to produce potassium sodium niobate [KNN] (K0.5Na0.5NbO3) glass ceramics from the KNN-SiO2 system. This incorporation method combines a simple mixed-oxide technique for producing KNN powder and a conventional melt-quenching technique to form the resulting glass. KNN was calcined at 800°C and subsequently mixed with SiO2 in the KNN:SiO2 ratio of 75:25 (mol%). The successfully produced optically transparent glass was then subjected to a heat treatment schedule at temperatures ranging from 525°C -575°C for crystallization. All glass ceramics of more than 40% transmittance crystallized into KNN nanocrystals that were rectangular in shape and dispersed well throughout the glass matrix. The crystal size and crystallinity were found to increase with increasing heat treatment temperature, which in turn plays an important role in controlling the properties of the glass ceramics, including physical, optical, and dielectric properties. The transparency of the glass samples decreased with increasing crystal size. The maximum room temperature dielectric constant (εr) was as high as 474 at 10 kHz with an acceptable low loss (tanδ) around 0.02 at 10 kHz.
publisher Springer
publishDate 2012
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3297504/
_version_ 1611511607048798208

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