Fabrication of Sn-doped zinc phosphate glass using a platinum crucible

Okada

et al. 2017

Sensors and Materials

Photoluminescence (PL) and radiation-induced luminescence properties of Sn-doped zinc phosphate (SZP) glasses prepared with different cooling rates are investigated and associated with their glass structures. Although the shape of the PL spectrum is independent of the cooling rate, the emission intensity effectively changes with the cooling rate. The radial distribution functions of Sn in the SZP glasses prepared with different cooling rates coincide with each other. Electron spin resonance (ESR) measurement supports the fact that the trap density of slowly cooled glasses is higher than that of rapidly cooled glasses, and this fact is also suggested by the radiation-induced luminescence properties. Therefore, it is expected that these traps will work as storage sites associated with the radiation-induced luminescence.

Section: Sample Preparationmentioning

confidence: 99%

Section: Sample Preparationmentioning

confidence: 99%

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Correlations between Glass Structure and Emission Properties of Sn-Doped Zinc Phosphate Glasses Prepared with Different Cooling Rates

Torimoto

Okada

et al. 2017

Sensors and Materials

“…Following a previous method, 27) a mixture of ZnO (99.99%) and (NH 4 ) 2 HPO 4 (99.0%) was initially calcined in an electric furnace at 800°C for 3 h in air. The calcined solid was then mixed with SnO (99.5%) at room temperature (r.t.) and the mixture was melted at 1100°C for 30 min in Ar atmosphere using a tubular electric furnace (Motoyama).…”

Section: Experimental 21 Sample Preparationmentioning

confidence: 99%

Correlation between the emission properties of Sn2+ center and the chemical composition of ZnO–P2O5 glasses

Torimoto

Tokuda

et al. 2016

J. Ceram. Soc. Japan

Self Cite

Photoluminescence (PL) properties of Sn-doped zinc phosphate (Sn:xZP) glasses with different chemical compositions are investigated. Sn exists only in the form of Sn 2+ in Sn:xZP glasses, which were prepared by a conventional melt-quenching method in Ar atmosphere. The glass-transition temperatures, T g , of the Sn-doped glasses are lower than that of Sn-free glasses, and the change in the T g values of Sn-doped glasses increases with increasing ZnO amount. Since the relative ratio of 4-fold coordinated Sn 2+ becomes higher with increasing ZnO amount, the coordination state is found to depend significantly on the network structure and not on the optical basicity of the Sn:xZP glasses. The PL bandwidth, indicating the site distribution, becomes narrower as the ZnO amount increases. In addition, the PL decay lifetime in the Zn-rich glass is shorter compared to that of the P 2 O 5 -rich glasses, implying that the distribution of Sn 2+ is also associated with the network structure. Thus, the network structure of the host matrix rather than the average optical basicity significantly influences the local structure of Sn 2+ emission center.

“…We have demonstrated that a sintering process (³800°C) using ZnO and (NH 4 ) 2 HPO 4 , in which zinc phosphate crystallites such as ¡-Zn 2 P 2 O 7 was formed to reduce amounts of OH groups, is the key to prevent damage to a Pt crucible. 34) Therefore, this process is important for the fabrication of contaminant-free phosphate glass using ammonium phosphate as a starting material.…”

Section: Preparation Of Snmentioning

confidence: 99%

Preparation of rare-earth-free oxide glass phosphors

2013

J. Ceram. Soc. Japan

Self Cite

Light emission in rare earth (RE)-free SnOZnOP 2 O 5 glasses is demonstrated. The RE-free transparent phosphate glasses show light emission with high quantum efficiency (QE) values, comparable to conventional crystalline phosphors, by excitation with deep-UV light. The broad emissions of the RE-free transparent glasses can be continuously tuned by both the amount of activator and the composition of the glasses, without reduction of the QE values. For future emitting devices, we believe that the lowmelting glasses will constitute one of the most industrially favorable inorganic materials possessing transparency and emitting properties.