Production of aluminium nitride powders by the pneumatic circulation method and determination of their significant features
https://doi.org/10.17073/1997-308X-2016-1-12-19
Abstract
A variety of powdered aluminium and aluminium nitride fractions were obtained by the pneumatic circulation method. The aluminium powders have small particle sizes and low content of Аl2ОЗ·3Н2О. Processing the SHS-К and SHS-N aluminium nitride powders under the same operating conditions revealed significant difference in particles morphology which depends on the methods of obtaining these materials. For AlN particles the K form-factor value changes when processing from 20,5 for the original powder to 11,8 for the powder residue in the unit. Applying the pneumatic circulation method in order to obtain AlN powders reveals their morphology features and electrokinetic characteristics in the dispersion. The effect of pH on the zeta potential (ζ) of the AlN particles was determined. Changing the pH value for the AlN powder from 3 to 8 leads to changing the value ζ from +15 to –23 mV.
About the Authors
V. A. Polyushko
Tomsk State University (TSU)
Russian Federation
Russian Federation
researcher of Innovation-technological research and education centre (ITREC),
634050, Tomsk, Lenin av., 36
Yu. A. Biryukov
Tomsk State University (TSU)
Russian Federation
Russian Federation
director of ITREC TSU, head of laboratory of aeromechanics of Research Institute of Applied Mathematics and Mechanics (RIAMM),
634050, Tomsk, Lenin av., 36
I. V. Ivonin
Tomsk State University (TSU)
Russian Federation
Russian Federation
Dr. Sci. (Phys.-Math.), prof., vice rector for research, head of the Department of semiconductor physics,
634050, Tomsk, Lenin av., 36
A. Yu. Obyedkov
Tomsk State University (TSU)
Russian Federation
Russian Federation
researcher of laboratory of aeromechanics of RIAMM,
634050, Tomsk, Lenin av., 36
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Review
For citations:
Polyushko V.A., Biryukov Yu.A., Ivonin I.V., Obyedkov A.Yu. Production of aluminium nitride powders by the pneumatic circulation method and determination of their significant features. Powder Metallurgy аnd Functional Coatings (Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional'nye Pokrytiya). 2016;(1):12-19. (In Russ.) https://doi.org/10.17073/1997-308X-2016-1-12-19
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