The Effect of Firing Temperature on Colour and Structural Properties of Malayaites With Cr

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901502" target="_blank" >RIV/00216275:25310/16:39901502 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The Effect of Firing Temperature on Colour and Structural Properties of Malayaites With Cr

Original language description

Malayaites are calcium tin silicate compounds derived from natural occurring mineral the malayaite which has the chemical formula CaSnSiO5. Malayaites are characterized by monoclinic crystal structure consisting of chains of distorted SnO6 octahedra connected with tops of SiO4 tetrahedra, forming a framework containing chains of CaO7 polyhedra. This incurred structure is then stable for bond of metal ion and takes part in the final pigment colouring. In this contribution the compounds with the chemical formula of Ca(SnCr)SiO5+-? (molar ratio of Cr/Sn = 0.015) were prepared. For the synthesis the classical ceramic method was used, i.e. procedures of calcination in an elec-tric furnace at the temperatures 1200-1500 oC for 4 h (one-step calcination) and multiple calcination (two-step calcination) for obtaining products with higher quality. Therefore, the objective of this work was to compare samples which were prepared by the one-step and also two-step calcination procedures. The two-step calcination procedure was carried out at two temperatures, during which the first calcina-tion was always held at 1100 oC for 4 hours. The second calcination was performed for 4 h at an appropriate temperature from the range 1200-1500 oC. The colour properties were studied by a spectrophotometer ColorQuest XE (HunterLab, USA). The colour moved from pink to burgundy in dependence on temperature of calcination. The phase composition of tested compounds was verified by using X-ray dif-fraction analysis with using a diffractometer D8 Advance (Bruker, GB). A particle size distribution of heat treatment samples was measured by Mastersizer 2000/MU (Malvern Instruments, Ltd., GB). The signal was evaluated on the basis of Fraunhofer bending. Thermal stability was investigated by heating microscope EM201-12 (Hesse-Instruments, Germany).

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CA - Inorganic chemistry

OECD FORD branch

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Project

<a href="/en/project/GA16-06697S" target="_blank" >GA16-06697S: Synthesis and characterization of new coloured mixed metal oxides</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materialy Ceramiczne/Ceramic Materials

ISSN

1505-1269

e-ISSN

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Volume of the periodical

68

Issue of the periodical within the volume

3

Country of publishing house

PL - POLAND

Number of pages

6

Pages from-to

193-198

UT code for WoS article

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EID of the result in the Scopus database

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