
Les nanoparticules de CoxPt100 −x (x = 50, 59 et 73) ont été préparées par réduction chimique du chlorure de cobalt (II) et de l'acide chloroplatinique, puis ultrasonorisées pendant 2 h. Après recuit à diverses températures de 450 °C à 700 °C pendant 1 h, un changement de structure a été observé et les échantillons montrent des propriétés magnétiques dures qui dépendent fortement de la composition chimique et de la température de recuit. La valeur de coercitivité la plus élevée de 1,15 kOe a été obtenue à température ambiante pour l'échantillon avec x = 50 recuit à 500 °C. La réduction chimique combinée aux ultrasons est une méthode utile pour préparer des nanoparticules de CoPt.
Se prepararon nanopartículas de CoxPt100 −x (x = 50, 59 y 73) mediante la reducción química de cloruro de cobalto (II) y ácido cloroplatínico, luego se sometieron a ultrasonidos durante 2 h. Después del recocido a varias temperaturas de 450 °C a 700 °C durante 1 h, se observó un cambio de estructura y las muestras muestran propiedades magnéticas duras que dependen en gran medida de la composición química y la temperatura de recocido. El valor de coercitividad más alto de 1.15 kOe se obtuvo a temperatura ambiente para la muestra con x = 50 recocido a 500 °C. La reducción química combinada con ultrasonido es un método útil para preparar nanopartículas de CoPt.
CoxPt100−x nanoparticles (x = 50, 59, and 73) were prepared by the chemical reduction of Cobalt (II) chloride and Chloroplatinic acid, then ultrasonicated for 2 h. After annealing at various temperatures from 450 °C to 700 °C for 1 h, structure change was observed and samples show hard magnetic properties which depend strongly on chemical composition and annealing temperature. The highest coercivity value of 1.15 kOe was obtained at room temperature for sample with x = 50 annealed at 500 °C. Chemical reduction combined with ultrasound is a useful method to prepare CoPt nanoparticles.
تم تحضير جسيمات CoxPt100 -x النانوية (x = 50 و 59 و 73) عن طريق الاختزال الكيميائي لكلوريد الكوبالت (II) وحمض الكلوروبلاتينيك، ثم بالموجات فوق الصوتية لمدة ساعتين. بعد التلدين عند درجات حرارة مختلفة من 450 درجة مئوية إلى 700 درجة مئوية لمدة ساعة واحدة، لوحظ تغير الهيكل وتظهر العينات خصائص مغناطيسية صلبة تعتمد بشدة على التركيب الكيميائي ودرجة حرارة التلدين. تم الحصول على أعلى قيمة قسرية تبلغ 1.15 كيلو أونصة في درجة حرارة الغرفة للعينة التي تحتوي على x = 50 ملدنة عند 500 درجة مئوية. الاختزال الكيميائي جنبا إلى جنب مع الموجات فوق الصوتية هو وسيلة مفيدة لإعداد الجسيمات النانوية CoPt.
L10 structure, Materials Science, Biomedical Engineering, Chemical composition, Organic chemistry, CoPt, FOS: Medical engineering, Coercivity, Catalysis, Hard magnetic materials, Analytical Chemistry (journal), Engineering, Nanoparticle, Chemical engineering, Nanotechnology, Annealing (glass), Materials of engineering and construction. Mechanics of materials, FOS: Chemical engineering, Platinum, Magnetic Skyrmions and Spintronics, FOS: Nanotechnology, Chromatography, Physics, Cobalt, Condensed matter physics, Atom Probe Tomography Research, Atomic and Molecular Physics, and Optics, Materials science, Electronic, Optical and Magnetic Materials, Nuclear chemistry, Chemistry, Magnetocaloric Materials Research, Physics and Astronomy, Physical Sciences, Magnetic nanoparticles, Metallurgy, TA401-492, Nanoscale Characterization, Chloroplatinic acid
L10 structure, Materials Science, Biomedical Engineering, Chemical composition, Organic chemistry, CoPt, FOS: Medical engineering, Coercivity, Catalysis, Hard magnetic materials, Analytical Chemistry (journal), Engineering, Nanoparticle, Chemical engineering, Nanotechnology, Annealing (glass), Materials of engineering and construction. Mechanics of materials, FOS: Chemical engineering, Platinum, Magnetic Skyrmions and Spintronics, FOS: Nanotechnology, Chromatography, Physics, Cobalt, Condensed matter physics, Atom Probe Tomography Research, Atomic and Molecular Physics, and Optics, Materials science, Electronic, Optical and Magnetic Materials, Nuclear chemistry, Chemistry, Magnetocaloric Materials Research, Physics and Astronomy, Physical Sciences, Magnetic nanoparticles, Metallurgy, TA401-492, Nanoscale Characterization, Chloroplatinic acid
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