Sol-gel synthesis and optical properties of malayaite ceramic colour pigments

Ceramic colour pigments based on the malayaite structure was synthesized by sol-gel with an aim to obtain homogeneous powder systems. The formulation was Ca(Sn1-xCrx)SiO5 where x = 0, 0.02 and 0.05. Thermogravimetric analysis and infrared spectroscopy suggested suitable calcination temperatures to b...

Full description

Bibliographic Details
Main Authors:	N. Yongvanich, N. Wangwanich, N. Phomwana
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2018
Online Access:	http://journalarticle.ukm.my/12041/ http://journalarticle.ukm.my/12041/ http://journalarticle.ukm.my/12041/1/19%20N.%20Yongvanich.pdf

id	ukm-12041
recordtype	eprints
spelling	ukm-120412018-09-09T23:30:22Z http://journalarticle.ukm.my/12041/ Sol-gel synthesis and optical properties of malayaite ceramic colour pigments N. Yongvanich, N. Wangwanich, N. Phomwana, Ceramic colour pigments based on the malayaite structure was synthesized by sol-gel with an aim to obtain homogeneous powder systems. The formulation was Ca(Sn1-xCrx)SiO5 where x = 0, 0.02 and 0.05. Thermogravimetric analysis and infrared spectroscopy suggested suitable calcination temperatures to be > 1000°C. Formation of malayaite phase was found to be very difficult; high calcination temperatures up to 1400°C was required which was typical for this particular phase. Nevertheless, small amounts of impurities were still present and were found to be both wollastonite (CaSiO3) and cassiterite (SnO2). The oxidation state of chromium was found to be mainly 4+. The obtained pigment particles were in the range of 1-5 micron with a high degree of agglomeration due to sintering. UV-vis spectra demonstrated broad absorbance peak in the 550-600 nm range which could be attributed to both Cr(III) and Cr(IV). The colour parameters in the CIELab system showed a red tone (more positive a* values whereas b* remained relatively constant) when chromium was doped into the malayaite host. Preliminary interaction testing with a low-fire glaze displayed an even improvement in the a* parameter (getting more red tone). Microscopic studies showed a certain degree of chromium diffusion out of the pigment powders toward the glaze matrix. These results have demonstrated a great potential for this refractory colour pigments to be possibly utilized in other kinds of glazes as well. Penerbit Universiti Kebangsaan Malaysia 2018-03 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/12041/1/19%20N.%20Yongvanich.pdf N. Yongvanich, and N. Wangwanich, and N. Phomwana, (2018) Sol-gel synthesis and optical properties of malayaite ceramic colour pigments. Sains Malaysiana, 47 (3). pp. 581-587. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid47bil3_2018/KandunganJilid47Bil3_2018.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Ceramic colour pigments based on the malayaite structure was synthesized by sol-gel with an aim to obtain homogeneous powder systems. The formulation was Ca(Sn1-xCrx)SiO5 where x = 0, 0.02 and 0.05. Thermogravimetric analysis and infrared spectroscopy suggested suitable calcination temperatures to be > 1000°C. Formation of malayaite phase was found to be very difficult; high calcination temperatures up to 1400°C was required which was typical for this particular phase. Nevertheless, small amounts of impurities were still present and were found to be both wollastonite (CaSiO3) and cassiterite (SnO2). The oxidation state of chromium was found to be mainly 4+. The obtained pigment particles were in the range of 1-5 micron with a high degree of agglomeration due to sintering. UV-vis spectra demonstrated broad absorbance peak in the 550-600 nm range which could be attributed to both Cr(III) and Cr(IV). The colour parameters in the CIELab system showed a red tone (more positive a* values whereas b* remained relatively constant) when chromium was doped into the malayaite host. Preliminary interaction testing with a low-fire glaze displayed an even improvement in the a* parameter (getting more red tone). Microscopic studies showed a certain degree of chromium diffusion out of the pigment powders toward the glaze matrix. These results have demonstrated a great potential for this refractory colour pigments to be possibly utilized in other kinds of glazes as well.
format	Article
author	N. Yongvanich, N. Wangwanich, N. Phomwana,
spellingShingle	N. Yongvanich, N. Wangwanich, N. Phomwana, Sol-gel synthesis and optical properties of malayaite ceramic colour pigments
author_facet	N. Yongvanich, N. Wangwanich, N. Phomwana,
author_sort	N. Yongvanich,
title	Sol-gel synthesis and optical properties of malayaite ceramic colour pigments
title_short	Sol-gel synthesis and optical properties of malayaite ceramic colour pigments
title_full	Sol-gel synthesis and optical properties of malayaite ceramic colour pigments
title_fullStr	Sol-gel synthesis and optical properties of malayaite ceramic colour pigments
title_full_unstemmed	Sol-gel synthesis and optical properties of malayaite ceramic colour pigments
title_sort	sol-gel synthesis and optical properties of malayaite ceramic colour pigments
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2018
url	http://journalarticle.ukm.my/12041/ http://journalarticle.ukm.my/12041/ http://journalarticle.ukm.my/12041/1/19%20N.%20Yongvanich.pdf
first_indexed	2023-09-18T20:01:43Z
last_indexed	2023-09-18T20:01:43Z
_version_	1777406893207060480

Sol-gel synthesis and optical properties of malayaite ceramic colour pigments

Similar Items