Zusammenfassung

Jaeckel, Rudolf; Reich, G.

doi:10.1007/978-3-663-04913-5_10

Cited by 1 publication

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“…[ 4 ] Jaeckel presented a fabrication method for polymer spheres that were superficially metalized by wet‐chemical processes followed by electroplating to obtain a coating thickness of about 50 μm. [ 5 ] The metalized polymer spheres were subsequently pyrolyzed by heating at about 400 °C. In further investigations, the polymer spheres were coated with a suspension containing binder and metallic particles in a fluid bed.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Critical Parameters for the Fabrication of Metal Hollow Spheres Using an Alginate‐Based Sol–Gel Process

Heuer,

Brachhold,

Aneziris

2023

Adv Eng Mater

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This study focuses on the fabrication of metal hollow spheres using an alginate based sol‐gel technology in combination with a freeze drying process. The mixing routine for the metal slurry is investigated. Critical processing parameters, influencing the yield of intact spheres such as the aging times in reaction solution and water as well as the freezing time and the rotation of the spheres during freezing are evaluated with statistical design of experiments. A customized debinding regime is developed with a heating rate of 0.1 K/min in critical temperature ranges and a maximum temperature of 350 °C. For the fabrication of hollow metal spheres with additions of 1.0 wt.% potassium alginate the optimum aging time in Ca(OH)2‐reaction solution is 4 min (4C) and the spheres are only to be rinsed with purified water (0W). Furthermore, the rotation of the spheres (+R) during freezing significantly contributes to the increased yield of 80.2 %, which is significantly higher as compared to the previous studies. Sintered spheres have a compressive strength of 159 MPa with a corresponding strain of 42 %.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%