Low temperature synthesis of barium oxynitridosilicates using BaCN2 and SiO2

Autor:	Kenji Arai, Yuji Masubuchi, Yoshiteru Kawahara, Mikio Higuchi, Teruki Motohashi, Naoki Sada
Rok vydání:	2021
Předmět:	Inorganic Chemistry Thermogravimetry Atmosphere Photoluminescence Materials science chemistry Phase ratio Analytical chemistry Solid-state chemistry.chemical_element Barium Gas chromatography Mass spectrometry
Zdroj:	Dalton Transactions. 50:5883-5889
ISSN:	1477-9234 1477-9226
DOI:	10.1039/d1dt00824b
Popis:	Barium oxynitridosilicates, Ba3Si6O12N2 and Ba3Si6O9N4, were obtained from a mixture of BaCN2 and SiO2 at 800 °C, which is several hundred degrees lower than the temperature required in solid state reactions using BaCO3, SiO2 and Si3N4. The low-temperature formation mechanism was investigated by thermogravimetry analysis in conjunction with gas chromatography and mass spectroscopy. The phase ratio between the oxynitridosilicates was controlled by tuning the reaction temperature, duration, and atmosphere. Almost single-phase Ba3Si6O12N2 was obtained by reaction at 800 °C for 15 h under a N2 atmosphere, but the product changed to Ba3Si6O9N4 after 50 h at 800 °C or by heating at 950 °C for 15 h. The photoluminescence properties of Eu-doped products obtained at 800 °C using a mixture of BaCN2 : Eu and SiO2 were investigated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a40ff9da3e2b186cdf1f5cfdc6a68dce https://doi.org/10.1039/d1dt00824b Zobrazit plný text záznamu