Aerosol Synthesis of Aluminum Nitride Powder Using Metalorganic Reactants

Adjaottor, Albert A.; Griffin, G. L.

doi:10.1111/j.1151-2916.1992.tb04413.x

Cited by 30 publications

(11 citation statements)

References 12 publications

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“…27 Similar disadvantages prevent the sublimationrecrystallization method from being widely adopted. 28 Aerol synthesis involves complicated procedures and needs expensive metalorganic reactants; 29 it is therefore not suitable for large-scale applications. Very few methods have been documented to synthesize AlN nanowires thinner than 50 nm, and synthesis of AlN nanowires with controlled diameter has not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

Novel synthesis of AlN nanowires with controlled diameters

Liu

Zhang

et al. 2001

J. Mater. Res.

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A relatively low-cost, high-efficiency method is reported to synthesize AlN nanowires, using carbon nanotubes as templates. The AlN nanowires were fabricated at 1100°C, for 60 min. The diameters of the product could be roughly controlled by the sizes of carbon nanotubes selected as starting materials. The AlN nanowires obtained were among the thinnest ever known. X-ray diffraction, selected-area diffraction, energy dispersive spectroscopy, and high-resolution transmission electron microscopy, etc. were employed to characterize the products, which were found to be single crystals with some defects. The axes of the nanowires are normal to {1010} crystal planes. A new synthesis mechanism is proposed.

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Section: Introductionmentioning

confidence: 99%

Novel synthesis of AlN nanowires with controlled diameters

Liu

Zhang

et al. 2001

J. Mater. Res.

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“…Durch eine gröûere Brennergeometrie soll der Prozess auf eine Rate von 1 kg/h gesteigert werden [59,60]. [62] oder GaAs [63].…”

Section: Chemische Dampf-kondensationunclassified

Aerosole und ihre technische Bedeutung

Heidenreich

Büttner

Ebert

2003

Chemie Ingenieur Technik

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Aerosole – gezielt erzeugt oder unerwünscht gebildet – treten in vielen technischen Prozessen auf. So werden zum Beispiel Aerosole gezielt erzeugt, wenn Produkte, die aus feindispersen Feststoffen bestehen, in einem Gasphasenprozess (im weitesten Sinn) hergestellt werden. Partikelbildung und ‐wachstum im Aerosolzustand prägen dabei die Größe, Form und Struktur der Partikel und damit entscheidend die Produkteigenschaften. Aerosole können sich auch unerwünscht in Prozessen bilden. Dies führt zur Verunreinigung von Prozessgasen oder Produkten beziehungsweise zu erhöhten Beladungen von Abluftströmen. Kann die unerwünschte Aerosolbildung nicht vermieden werden, müssen wirkungsvolle Abscheideverfahren eingesetzt werden. Effiziente Abscheider sind auch zur Gewinnung von Produktpartikeln aus der Gasphase notwendig. Ob gezielt erzeugt oder unerwünscht gebildet, Aerosole müssen hochauflösend erfasst und charakterisiert werden. Dies erfordert eine entsprechend leistungsfähige Aerosolmesstechnik. Der Beitrag vermittelt einen Überblick über die technische Bedeutung von Aerosolen.

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“…It is a promising advanced ceramic material with many excellent properties such as high band gap of around 6.2 eV, high electrical resistivity (10 13 ), small dielectric constant (8.8 at 1 MHz), and low thermal expansion coefficient (which closely matched that of silicon, 4.7×10 −6 K −1 ) [1,2]. Many methods have been reported on the production of AlN powders including direct nitridation of Al metal in N 2 or NH 3 atmosphere, carbothemal reduction of Al 2 O 3 in Al 2 O 3 -C-N 2 system or Al 2 O 3 -NH 3 -C 3 H 8 system [3][4][5], vapor phase synthesis [6,7], plasma synthesis [8,9], and self-propagating high temperature synthesis [10,11]. Among them, two primary processes to manufacture AlN powders commercially are direct nitridation and carbothermal reduction [12].…”

Section: Introductionmentioning

confidence: 98%

Aluminum Nitride Formation From Aluminum Oxide/Phenol Resin Solid-Gel Mixture By Carbothermal Reduction Nitridation Method

Mylinh

Yoon

Kim

2015

Archives of Metallurgy and Materials

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Hexagonal and cubic crystalline aluminum nitride (AlN) particles were successfully synthesized using phenol resin and alpha aluminum oxide (α-Al 2 O 3 ) as precursors through new solid-gel mixture and carbothermal reduction nitridaton (CRN) process with molar ratio of C/Al 2 O 3 = 3. The effect of reaction temperature on the decomposition of phenol resin and synthesis of hexagonal and cubic AlN were investigated and the reaction mechanism was also discussed. The results showed that α-Al 2 O 3 powder in homogeneous solid-gel precursor was easily nitrided to yield AlN powder during the carbothermal reduction nitridation process. The reaction temperature needed for a complete conversion for the precursor was about 1700• C, which much lower than that when using α-Al 2 O 3 and carbon black as starting materials. To our knowledge, phenol resin is the first time to be used for synthesizing AlN powder via carbothermal reduction and nitridation method, which would be an efficient, economical, cheap assistant reagent for large scale synthesis of AlN powder.

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Aerosol Synthesis of Aluminum Nitride Powder Using Metalorganic Reactants

Cited by 30 publications

References 12 publications

Novel synthesis of AlN nanowires with controlled diameters

Novel synthesis of AlN nanowires with controlled diameters

Aerosole und ihre technische Bedeutung

Aluminum Nitride Formation From Aluminum Oxide/Phenol Resin Solid-Gel Mixture By Carbothermal Reduction Nitridation Method

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