Experimental determination of the pyrolysis temperatures of an organometallic complex to obtain AlxGa1-xN powders

Herrera, Ana M.; Garcı́a, R.; García, Gregorio Gómez-Jarabo; Gastellóu, Erick; Nieto, Fabiola; Hirata, G. A.; Contreras, O.; Morales, C.; Rosendo, E.; Díaz, T.

doi:10.1016/j.jallcom.2018.10.094

Cited by 4 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5a) shows the HRTEM micrograph for the Al0.6Ga0.4N powders. This Figure demonstrated the presence of hexagonal nanocrystals with an average crystal size of 9.7 nm, which indicate that at increase the aluminum concentration, decrease the crystalline size [13]. Also, the loss of definition in the hexagonal nanocrystals was observed.…”

Section: B Electron Microscopymentioning

confidence: 66%

“…When the chamber was oxygen free, it was introduced a N2 flow at 150 sccm, as transport gas of the pyrolysis subproducts. Later the sample was slowly preheated to homogenize the polymer at a temperature close to the pyrolysis temperature [13]. The homogenization was made during one hour to prepare the controlled ignition of the organometallic compound.…”

Section: B Obtaining Of Algan Powders Via Pyrolysis Routementioning

confidence: 99%

“…The homogenization was made during one hour to prepare the controlled ignition of the organometallic compound. After, the temperature was increased until reaching the pyrolysis temperature (2 °C/min) [13]. The formation of white vapors or a slight variation in outlet pressure indicated that the pyrolysis was made.…”

Section: B Obtaining Of Algan Powders Via Pyrolysis Routementioning

confidence: 99%

“…The formation of white vapors or a slight variation in outlet pressure indicated that the pyrolysis was made. It is important to mention that the pyrolysis temperature was systematically checked by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) in a before work [13]. Once the process is finished, the temperature was decreased until reaching the room temperature using a N2 atmosphere (150 sccm).…”

Section: B Obtaining Of Algan Powders Via Pyrolysis Routementioning

confidence: 99%

“…The AlGaN ternary alloy is generally obtained via metalorganic chemical vapor deposition (MOCVD), metalorganic vapor phase epitaxy (MOVPE), and molecular beam epitaxy (MBE) [10]- [12]. However, other techniques such as ethylene diamine tetra acetic acid (EDTA) complex route, pyrolysis of the metal-organic compound using gallium and aluminum nitrates as precursors, as well as, the pyrolysis of metal amide-imide precursors could synthesize nanocrystals into the AlGaN alloy [13]. This work presents the obtaining of hexagonal nanocrystals into AlGaN powders via pyrolysis from an organometallic compound (CH6N4O)3Al-Ga(NO3)3, followed by a nitridation process in NH3 flow at 1000 °C for two hours.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Hexagonal Nanocrystals into AlGaN Powders Obtained via Pyrolysis from an Organometallic Compound

Herrera¹,

García²,

Gastellóu³

et al. 2019

EJERS

Self Cite

View full text Add to dashboard Cite

Hexagonal nanocrystals into Al0.2Ga0.8N and Al0.6Ga0.4N powders via pyrolysis from an organometallic compound, followed by a nitridation process in ammonia flow at 1000 °C for two hours were obtained. X-ray diffraction patterns demonstrated a shift towards greater angles to the right for the AlGaN powders with respect to GaN powders, this shift could indicate the formation of the AlGaN powders. Scanning electron microscopy micrographs showed the obtaining from semi-plates of porous appearance for the Al0.2Ga0.8N powders until well-defined plates for the Al0.6Ga0.4N powders. High resolution transmission electron microscopy micrographs demonstrated the presence of hexagonal nanocrystals into Al0.2Ga0.8N powders with an average crystal size of 10.3 nm, while that for the Al0.6Ga0.4N powders an average crystal size of 9.7 nm was observed. UV-visible spectra showed a transmittance cut-off for the Al0.2Ga0.8N powders of 3.71 eV (334.2 nm) and a transmittance cut-off of 4.53 eV (273.7 nm) for the Al0.6Ga0.4N powders.

show abstract

Section: B Electron Microscopymentioning

confidence: 66%

Section: B Obtaining Of Algan Powders Via Pyrolysis Routementioning

confidence: 99%

Section: B Obtaining Of Algan Powders Via Pyrolysis Routementioning

confidence: 99%

Section: B Obtaining Of Algan Powders Via Pyrolysis Routementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hexagonal Nanocrystals into AlGaN Powders Obtained via Pyrolysis from an Organometallic Compound

Herrera¹,

García²,

Gastellóu³

et al. 2019

EJERS

Self Cite

View full text Add to dashboard Cite

show abstract

Effect of the Pyrolysis Environment in a Complex Compound in the Synthesis of In_0.6Ga_0.4N Powders and their Characterization

Herrera,

Ramos,

Gastellóu

et al. 2024

Physica Status Solidi (a)

View full text Add to dashboard Cite

In this work, the comparison between nitrogen and air synthesis environments in obtaining In0.6Ga0.4N powders is presented, and the effect of how the air environment can reduce the pyrolysis temperature of In0.6Ga0.4N powders to 271 °C using the thermal gravimetric analysis, and derivative thermogravimetry methods. X‐ray diffraction patterns demonstrate the presence of a cubic phase in nanocrystallites, in addition to less presence of the hexagonal phase. In contrast, scanning electron microscopy micrographs show a surface morphology of irregular agglomerates with a porous appearance and the presence of nonuniform plates. Energy‐dispersive spectroscopy and X‐ray photoelectron spectroscopy spectra demonstrate the presence of elemental contributions of gallium, indium, and nitrogen. At the same time, transmission electron microscopy shows the cubic structure and an interplanar distance of 2.7 Å for the (200) plane. Raman scattering shows the presence of E2(high) vibration mode for the hexagonal phase with a value of 560 cm−1. Finally, the photoluminescence spectrum shows an energy emission at 1.39 eV (886 nm), which is associated with the emission of the In0.6Ga0.4N powders.

show abstract

Novel nanoceramics from in situ made nanocrystalline powders of pure nitrides and their composites in the system aluminum nitride AlN/gallium nitride GaN/aluminum gallium nitride Al0.5Ga0.5N

Drygaś

Kapusta

Janik

et al. 2020

Journal of the European Ceramic Society

View full text Add to dashboard Cite

Experimental determination of the pyrolysis temperatures of an organometallic complex to obtain AlxGa1-xN powders

Cited by 4 publications

References 24 publications

Hexagonal Nanocrystals into AlGaN Powders Obtained via Pyrolysis from an Organometallic Compound

Hexagonal Nanocrystals into AlGaN Powders Obtained via Pyrolysis from an Organometallic Compound

Effect of the Pyrolysis Environment in a Complex Compound in the Synthesis of In_0.6Ga_0.4N Powders and their Characterization

Novel nanoceramics from in situ made nanocrystalline powders of pure nitrides and their composites in the system aluminum nitride AlN/gallium nitride GaN/aluminum gallium nitride Al0.5Ga0.5N

Contact Info

Product

Resources

About

Experimental determination of the pyrolysis temperatures of an organometallic complex to obtain AlxGa1-xN powders

Cited by 4 publications

References 24 publications

Hexagonal Nanocrystals into AlGaN Powders Obtained via Pyrolysis from an Organometallic Compound

Hexagonal Nanocrystals into AlGaN Powders Obtained via Pyrolysis from an Organometallic Compound

Effect of the Pyrolysis Environment in a Complex Compound in the Synthesis of In0.6Ga0.4N Powders and their Characterization

Novel nanoceramics from in situ made nanocrystalline powders of pure nitrides and their composites in the system aluminum nitride AlN/gallium nitride GaN/aluminum gallium nitride Al0.5Ga0.5N

Contact Info

Product

Resources

About

Effect of the Pyrolysis Environment in a Complex Compound in the Synthesis of In_0.6Ga_0.4N Powders and their Characterization