Machines. Technologies. Materials.
Vol. 18 (2024), Issue 5, pg(s) 156-159

TECHNOLOGIES

Use of hollow spheres to create highly porous permeable materials based on fine powders

  • 1 State Research and Production Powder Metallurgy Association – Minsk, Republic of Belarus; State Scientific Institution “O.V. Roman Powder Metallurgy Institute” – Minsk, Republic of Belarus
  • 2 State Scientific Institution “O.V. Roman Powder Metallurgy Institute” – Minsk, Republic of Belarus

Abstract

The possibility of using hollow spheres to create highly porous materials (HPM) based on fine powders is shown. In the process of obtaining HPM, fine powder acts as a matrix, hollow spheres are used as a pore-forming agent. At the same time, in the initial state, hollow spheres are formed in the form of bead-shaped polystyrene granules (PSG) with a coated shell of fine aluminum oxide powder, followed by the removal of PSG during sintering. The shell prevents the integration of spherical voids into a single system of large pores, providing high purification fineness. It is confirmed that this technology provides an increase in throughput at a given fineness of purification.

Keywords

References

  1. F. Gutman, V. Vaskovskiy. "Influence of powder-forming additives on characteristics of permeable materials made of sintered nickel powders with bidisperse structure." Powder Metallurgy. 7. (1979). 104 - 166. Russia.
  2. V.A. Mikuckij, A.I. Vazhnova, V.I. Goncharov, O.L. Smorygo. Ceramic hollow spheres based on alumina. Production and properties. New materials and technologies: powder metallurgy, composite materials, protective coatings, welding. Minsk: Belaruskaya navuka, 2022. P. 274-278.
  3. Nickel powder. Technical conditions. GOST 9722-97. (Minsk, Izdatelstvo standartov). (1997). Russia
  4. Electrocorundum grinding materials. Technical conditions. GOST 28818-90. (Moscow, Izdatelstvo standartov). (1991). Russia.
  5. P.A. Vityaz, V.M. Kaptsevich, V.K. Sheleg. Porous powder materials and products made therefrom (Minsk, Vysheyshaya Shkola) (1987). Russia.
  6. M.V. Tumilovich, L.P. Pilinevich, V.V. Savich, O.L. Smorygo, A.E. Galkin. Porous powder materials and products on their basis for protection of human health and environment: production, properties, application (Minsk, BSATU). (2018).
  7. A.Ph. Ilyushchanka, R.A. Kusin, I.V. Zakrevsky, N.N.Yakimovich I.N. Charniak A.R., Kusin, D.I. Zhegzdrin. Powder filter media: structure and property management and agricultural applications. (Minsk, BSATU). (2018).
  8. Materials and products of building thermal insulation. Classification. General technical requirements. GOST 16381-2022. (Minsk, Gosstandart). (2023).
  9. A.D. Zhukov. Highly porous materials: structure and heat and mass transferring (Moscow, MGSU). (2014).
  10. E.G. de Moraes, L. Sangiacomo, N. P. Stochero, S. Arcaro, L. R. Barbosa, A. Lenzi, C. Siligardi, A.P. Novaes de Oliveira Innovative thermal and acoustic insulation foam by using recycled ceramic shell and expandable styrofoam (EPS) wastes, Waste Management (2019). https://doi.org/10.1016/j.wasman.2019.04.019.

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