Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Properties of NdFeB magnetic cement
Abstract Enhanced functional properties of cement pastes were achieved by introducing hard magnetic powders (NdFeB) into cement mixtures. The magnetic cement (cementitious magnet) employed a simple and inexpensive cementitious process to form complex NdFeB magnet shapes. NdFeB particles were distributed uniformly in the cement matrix. The density and compressive strength of the magnetic cement composites increased with the NdFeB concentration. Magnetization (stable up to one year) also increased with NdFeB powder but the coercivity did not change. The saturation magnetization (∼85 emu/g) and coercivity (∼7000 Oe) of the magnetic cement composites were larger than pure Ni, cubic or hard ferrites. The energy product (BH)max was found to be ∼1.0 MGOe, comparable to ferrite bonded magnets. Permanent magnetic behavior was demonstrated by using the magnetic cement for lifting metallic pieces or other magnetic cements. The endurance of the samples was also tested in two artificial environments.
Graphical abstract Magnetic cements, NdFeB magnets fabricated via a cementitious route, can be easily formed in various shapes and show permanent magnetic properties. Display Omitted
Properties of NdFeB magnetic cement
Abstract Enhanced functional properties of cement pastes were achieved by introducing hard magnetic powders (NdFeB) into cement mixtures. The magnetic cement (cementitious magnet) employed a simple and inexpensive cementitious process to form complex NdFeB magnet shapes. NdFeB particles were distributed uniformly in the cement matrix. The density and compressive strength of the magnetic cement composites increased with the NdFeB concentration. Magnetization (stable up to one year) also increased with NdFeB powder but the coercivity did not change. The saturation magnetization (∼85 emu/g) and coercivity (∼7000 Oe) of the magnetic cement composites were larger than pure Ni, cubic or hard ferrites. The energy product (BH)max was found to be ∼1.0 MGOe, comparable to ferrite bonded magnets. Permanent magnetic behavior was demonstrated by using the magnetic cement for lifting metallic pieces or other magnetic cements. The endurance of the samples was also tested in two artificial environments.
Graphical abstract Magnetic cements, NdFeB magnets fabricated via a cementitious route, can be easily formed in various shapes and show permanent magnetic properties. Display Omitted
Properties of NdFeB magnetic cement
Chuewangkam, Nattapong (Autor:in) / Pinitsoontorn, Supree (Autor:in) / Chindaprasirt, Prinya (Autor:in)
Cement and Concrete Composites ; 103 ; 204-212
09.05.2019
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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