Effect of Gas Type and Pressure on Particle Properties in Ag Nano Powder Production Using IGC Method

Öz

Polymer-based materials can be made electrically conductive by combining them with conductive materials in particulate form. Instead of traditional high aspect ratio fillers such as particles, fibers, and flakes, highly porous, conductive, low-volume nanopowders are produced for use in polymer matrix composites. These porous powders are generally produced using the inert gas condensation (IGC) method in a He atmosphere. In this study, Ar gas was used as an alternative to the commonly used He gas to produce silver nanoparticles at low pressures, and the results were compared. Instead of production at the standard 20 mb pressure, samples were produced in He and Ar environments at 10 mb, 20 mb, and 40 mb pressures, and the resulting powders were compared.. In this study, a 1 mm Ag wire was evaporated in a W evaporator at 1500 °C and different pressures. The evaporated metal atoms nucleate homogeneously in contact with the carrier gas, grow, and collect in the filter at the back. In this study, the size, shape, and specific surface area of the powders produced at different parameters were investigated and compared. Powders produced under standard 20 mb pressure with He gas had an average powder size of 74 nm, a more clustered structure, and significant sinter necking between particles, while powders produced under the same conditions with Ar gas were found to be much coarser (120 nm in diameter), more spherical, and exhibited less sinter necking.

Anahtar Kelimeler

• Inert Gas Condensation Method
• Ag nanopowders
• He and Ar atmosphere
• particle size and morphology.

IGC Yöntemiyle Ag Nano Toz Üretiminde Gaz Türü ve Basıncın Parçacık Özelliklerine Etkisi

Öz

Polimer bazlı malzemeler, partikül formundaki iletken malzemelerle birleştirilerek elektriksel olarak iletken hale getirilebilir. Partiküller, lifler ve pullar gibi geleneksel yüksek en boy oranlı dolgu maddeleri yerine, polimer matris kompozitlerinde kullanılmak üzere yüksek gözenekli, iletken, düşük hacimli nanotozlar şeklinde üretilir. Bu gözenekli tozlar genellikle He atmosferinde inert gaz yoğunlaştırma (IGC) yöntemi kullanılarak üretilir. Bu çalışmada, düşük basınçlarda Ag nanopartiküller üretmek için yaygın olarak kullanılan He gazına alternatif olarak Ar gazı kullanılmış ve sonuçlar karşılaştırılmıştır. Standart 20 mb basınçta üretim yerine, numuneler He ve Ar ortamında 10 mb, 20 mb ve 40 mb basınçlarda üretilmiş ve elde edilen tozlar karşılaştırılmıştır. Bu çalışmada, 1 mm'lik bir gümüş tel, 1500 °C'de ve farklı basınçlarda bir W buharlaştırıcıda buharlaştırılmıştır. Buharlaştırılan metal atomları, taşıyıcı gazla temas halinde homojen olarak çekirdeklenmekte, büyümekte ve arkadaki filtrede toplanmaktadır. Bu çalışmada, farklı parametrelerde üretilen tozların boyutu, şekli ve özgül yüzey alanı incelenmiş ve karşılaştırılmıştır. Standart 20 mb basınç altında He gazı ile üretilen tozların ortalama toz boyutu 74 nm, daha kümelenmiş bir yapıya ve parçacıklar arasında belirgin sinter boyunlaşmasına sahip olduğu bulunmuştur; aynı koşullar altında Ar gazı ile üretilen tozların ise çok daha iri (120 nm çapında), daha küresel olduğu ve daha az sinter boyunlaşması gösterdiği tespit edilmiştir.

Anahtar Kelimeler

• Asal Gaz Yoğuşma Yöntemi
• Ag nanotozları
• He ve Ar atmosferi
• parçacık boyutu ve morfolojisi

Kaynakça

1. [1] Suryanarayana, C. and B. Prabhu, Synthesis of nanostructured materials by inert-gas condensation methods, in Nanostructured materials. 2007, Elsevier. p. 47–90.
2. [2] Musa, I., N. Qamhieh, and S.T. Mahmoud, Ag nanocluster production through DC magnetron sputtering and inert gas condensation: a study of structural, Kelvin probe force microscopy, and optical properties. Nanomaterials, 2023. 13(20): p. 2758.
3. [3] Goldstein, A., Handbook of nanophase materials. 1997: CRC Press.
4. [4] Suryanarayana, C., The structure and properties of nanocrystalline materials: issues and concerns. Jom, 2002. 54(9): p. 24–27.
5. [5] Averback, R. and H. Hofler, Processing and properties of nanophase materials. Microcomposite and Nanophase Materials, The Mineral and Materials Society, Ed. by DC Van Aken et al, 1991: p. 27–39.
6. [6] Mekuye, B. and B. Abera, Nanomaterials: An overview of synthesis, classification, characterization, and applications. Nano select, 2023. 4(8): p. 486–501.
7. [7] El-Khawaga, A.M., A. Zidan, and A.I. Abd El-Mageed, Preparation methods of different nanomaterials for various potential applications: A review. Journal of Molecular Structure, 2023. 1281: p. 135148.
8. [8] Edelstein, A., Nanoparticles from a supersaturated vapor, in Nanophase Materials: Synthesis—Properties—Applications. 1994, Springer. p. 73–80.

9. [9] Kodas, T. and M. Hampden-Smith, Aerosol Processing of Materials Wiley-VCH. New York, 1999: p. 19.
10. [10] Bandyopadhyay, A.K., Nano materials. 2008: New Age International.
11. [11] Kumar, P.M., et al., Nanophase alumina synthesis in thermal arc plasma and characterization: correlation to gas-phase studies. Materials Science and Engineering: B, 1999. 63(3): p. 215–227.
12. [12] Wu, X., et al., Thermal properties of nanocrystaLLine silver. MRS Online Proceedings Library, 1992. 286(1): p. 149–153.
13. [13] Weißmuller, J., R. Birringer, and H. Gleiter, Interface in Nanostructured Amorphous and Crystalline Solid. Microcomposite and Nanophase Materials, The Mineral and Materials Society, Ed. By DC Van Aken et al, 1991: p. 1–13.
14. [14] Nieman, G., J.R. Weertman, and R. Seigel, Mechanical behavior of nanocrystalline Cu, Pd and Ag samples. 1991, Argonne National Laboratory (ANL), Argonne, IL (United States).
15. [15] Jena, P., et al., Clusters-A New Source for Atomically Engineered Materials. MRS Online Proceedings Library (OPL), 1990. 206: p. 3.
16. [16] Choi, S.J. and M.J. Kushner, Simulation of Gas Phase Clustering of Nanocrystals in Sputter Discharges. MRS Online Proceedings Library (OPL), 1990. 206: p. 283.
17. [17] Noman, M.T., M.A. Ashraf, and A. Ali, Synthesis and applications of nano-TiO2: a review. Environmental science and pollution research, 2019. 26(4): p. 3262–3291.
18. [18] Zhuang, C. and Y. Chen, The effect of nano-SiO2 on concrete properties: a review. Nanotechnology Reviews, 2019. 8(1): p. 562–572.
19. [19] Ding, J., et al., Synthesis and Processing of Nanocrystalline Powder, ed. by DL Bouvell. 1996, TMS.
20. [20] Abdelsalam, S.I., A. Magesh, and P. Tamizharasi, Optimizing fluid dynamics: An in-depth study for nano-biomedical applications with a heat source. Journal of Thermal Analysis and Calorimetry, 2025. 150(4): p. 2781–2793.
21. [21] TÜRKER, M., Effect of oxygen content on the properties and electrical conductivity of Ag nanopowders produced by IGC.
22. [22] Turker, M., Effect of production parameters on the structure and morphology of Ag nanopowders produced by inert gas condensation. Materials Science and Engineering: A, 2004. 367(1-2): p. 74–81.
23. [23] Günther, B., M. Türker, and J. Mehlich. Influence of W/O-content on DC-conductivity of Ag-nanopowders. in World Conference on Powder Metallurgy & Particulate Materials (PM2TEC) 2002. 2002.
24. [24] Grangvist, C. and R. Buhrman, Ultrafine Metal Powders. Journal of Applied Physics, 1976. 47: p. 2200.