Phase transformation of melamine at high pressure and temperature
Source abstract
Abstract
Pyrolysis experiments of melamine were carried out under high pressure of 5 GPa and different temperatures. The crystal structure, chemical bonding, and composition of the melamine pyrolysate were studied by X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray energy-dispersive analysis (EDX), and combustion elemental analysis. A new C–N–H phase was found in the pyrolysate at 5 GPa and 800 °C. The structure is tentatively indexed as a monoclinic symmetry, with the following lattice parameters: a = 8.5368 (±0.0009)A, b = 9.1153 (±0.0010)A, c = 10.2440 (±0.0011)A, α = γ = 90°, and β = 95.5696 (±0.0016)°. The photoluminescence behavior of the pyrolysates was investigated. A blue emission at 421 nm for the C–N–H phase was observed under the ultraviolet light excitation of 365 nm.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Energetic Materials and Combustion · Melamine detection and toxicity · Nonlinear Optical Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (27)
Show source-provided references
1. May H (1959) J Appl Chem 9:34010.1002/jctb.5010090608 ↗
2. van der Plaats G, Soons H, Snellings R (1981) Second European symposium on thermal analysis. London, p 215
3. Costa L, Camino G (1988) J Therm Anal 34:42310.1007/BF01913181 ↗
4. Sekine T, Kanda H, Bando Y et al (1990) J Mater Sci Lett 9:137610.1007/BF00721588 ↗
5. Maya L, Cole DR, Hagaman EW (1991) J Am Ceram Soc 74(1):686
6. Alves GD, Tanguy B, Weill F (1999) Solid State Commun 109:69710.1016/S0038-1098(98)00631-0 ↗
7. Montigaud H, Tanguy B, Demazeau G et al (1999) Diamond Relat Mater 8:170710.1016/S0925-9635(99)00054-0 ↗
8. Montigaud H, Tanguy B, Demazeau G et al (2000) J Meter Sci 35:254710.1023/A:1004798509417 ↗
9. Nguyen JH, Jeanloz R (1996) Mater Sci Eng A 209:2310.1016/0921-5093(95)10129-2 ↗
10. Terrones M, Redlich P, Grobert N et al (1999) Adv Mater 11:65510.1002/(SICI)1521-4095(199906)11:8<655::AID-ADMA655>3.0.CO;2-6 ↗
11. Yao LD, Li FY, Li JX et al (2005) Phys Stat Sol (a) 202:267910.1002/pssa.200421177 ↗
12. Liu WQ, Ma HA, Jia X et al (2007) Diamond Relat Mater 16:148610.1016/j.diamond.2006.12.034 ↗
13. Bean VE et al (1985) Proceedings of the Xth AIRAPT international high pressure conference on research in high pressure science and technology, Amsterdam, Netherlands, July 8–11, pp 51–144
14. Markvardsen A, David J, Johnson WIF et al (2000) Acta Cryst A57:47
15. Huttel JG, Cerny F et al (1999) Diamond Relat Mater 8:62810.1016/S0925-9635(98)00408-7 ↗
16. Kulisch W, Delplancke-Ogletree MP et al (1999) Diamond Relat Mater 8:103910.1016/S0925-9635(98)00452-X ↗
17. Wang J, Rangel EC et al (2000) Nucl Instr Meth Phys Res B 166–167:420
18. Costa L, Camino G (1988) J Therm Anal 34:42310.1007/BF01913181 ↗
19. Muhl S, Gaona-Couto A et al (1998) Diamond Relat Mater 7:160510.1016/S0925-9635(98)00168-X ↗
20. Mutsukura N, Akita K-i (1999) Diamond Relat Mater 8:172010.1016/S0925-9635(99)00032-1 ↗
21. Dementjev P, de Graaf A, Dolgiy DI et al (1999) Diamond Relat Mater 8:60110.1016/S0925-9635(98)00356-2 ↗
22. Wagner CD (1980) In: Barr TL, Davis LE (eds) Applied surface analysis. ASTM, Philadelphia, p 13710.1520/STP38657S ↗
23. Bird RJ, Swift PJ (1980) J Electron Spectrosc Relat Phenom 21:22710.1016/0368-2048(80)85050-X ↗
24. Fu Y, Wei J, Yan B et al (2000) J Mater Sci 35:221510.1023/A:1004770708527 ↗
25. Zocco AP, Anna ED et al (1999) Diamond Relat Mater 8:58210.1016/S0925-9635(98)00357-4 ↗
26. Chen GL, Li Y, Lin J et al (1999) Diamond Relat Mater 8:190610.1016/S0925-9635(99)00155-7 ↗
27. Deichmann VAF, Lisboa-Filho PN, Martins TD et al (2007) J Lumin 124:34310.1016/j.jlumin.2006.04.008 ↗