Effect of high-energy ball milling time on structural and magnetic properties of nanocrystalline cobalt ferrite powders

Cedeño-Mattei, Yarilyn; Perales-Pérez, Óscar; Uwakweh, O. N. C.

doi:10.1016/j.jmmm.2013.04.015

Cited by 35 publications

(19 citation statements)

References 20 publications

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“…The values of crystal size as a function of milling time were on a nanometer scale which did not change the phase of spinel Fe 3 O 4 , as shown in figure 1 and table 1. The values of the crystal size were calculated from the most intense (1 3 1) XRD peak using the Debye Scherer formula, which showed the effectiveness in 6 h at 100 rpm for reducing particle size was the same as Mattei et al's [11] result. Magnetic hysteresis loops observed in the natural ferrites at room temperature are shown in figure 2.…”

Section: X-ray Diffraction Patterns and Magnetic Propertiesmentioning

confidence: 73%

“…The greater the magnetic remanence value was, the larger the field was required to be to eliminate the magnetization. This was because remanence magnetization remained when a substance was not influenced by an external field [11]. Remanence magnetization values could not be compared with the field as this tended to increase coercivity of natural ferrite.…”

Section: X-ray Diffraction Patterns and Magnetic Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and microwave absorbing properties in the X-band of natural ferrites from iron sands by high energy milling

Mashuri

Lestari

Triwikantoro

et al. 2018

Mater. Res. Express

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Section: X-ray Diffraction Patterns and Magnetic Propertiesmentioning

confidence: 73%

Section: X-ray Diffraction Patterns and Magnetic Propertiesmentioning

confidence: 99%

Preparation and microwave absorbing properties in the X-band of natural ferrites from iron sands by high energy milling

Mashuri

Lestari

Triwikantoro

et al. 2018

Mater. Res. Express

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“…Under the compression and shearing load of glass balls, on one hand, copper plating mesh together with copper power ground down from copper plating because of displacement and deformation. On the other hand, the atoms on the surface of plating are close to each other, when the extranuclear electron of atom overlap with that of other atom, two copper atoms are welded together to form a new metallic bond [10,11]. It is obvious that the grains size of copper plating decreased while the diameter of glass ball increased.…”

Section: Discussionmentioning

confidence: 99%

Effect of mechanical attrition on microstructure and property of electroplating of copper plating in acid solution

Feng¹,

Wu²,

Hu³

2015

Advances in Intelligent Systems Research

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Abstract. In this paper, the mechanical attrition(MA) was supplied in a traditional electroplating process by rolling movement of different diameter of glass balls in the acid copper plating electrolyte to study the effects of different diameters of the glass balls on microstructure of copper plating and the properties of carbon-impervious, grain refine and corrosion resistance. The results showed that the grain size of the plating had obviously decreased in the MA process, and with increasing the diameters of the glass balls, the porosity, corrosion resistance and the properties of carbon-impervious of the plating were first increased and then decreased.

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“…Analiz sonucunda ortalama parçacık boyutu 866 nm olarak belirlenmiştir. Yüksek enerjili bilyalı öğütme başlangıç bileşenlerine göre elde edilen ürünlerin kristal boyutunun azaltılmada kullanıldığı bir tekniktir [13]. [26].…”

Section: Materyal Ve Metot (Materials and Method)unclassified

“…Yüksek enerjili bilyalı öğütme olarak da ifade edilebilen bu yöntem, temel tozlardan başlayarak dengede ve dengede olmayan alaşım fazın sentezinin sağlandığı [12] ve başlangıç bileşenlerine göre elde edilen ürünlerin kristal boyutunun azaltılmada kullanıldığı bir katı hal toz işleme tekniğidir [13]. Yüksek enerjili bilyalı değirmen tekniği, sentezlenen nano kristal tozların atomik veya moleküler ölçekte homojen olması sebebiyle [14] yüksek sıcaklık katı hal reaksiyon tekniği ile karşılaştırıldığında kalsinasyon sıcaklığı genellikle daha düşüktür [15].…”

Section: Mekanokimyasalunclassified

Mekanoki̇myasal Yöntemle Bor Oksi̇tten Elementel Bor Sentezlenmesi̇ Ve Karakteri̇zasyonu

Gokdai

Gürü

Toğrul

2016

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETBu çalışmada, susuz bor oksitten yola çıkarak katma değeri yüksek bor uç ürünlerinden biri olan elementel borun mekanokimyasal yöntem ile sentezi ve karakterizasyonu gerçekleştirilmiştir. İndirgeme işleminde metalik halde Mg tozu kullanılmıştır. Farklı öğütme sürelerinde ve farklı tepkime oranlarında bor oksit ve magnezyum, inert atmosferde ve oda sıcaklığında öğütülmüştür. Öğütülen toza fırında ısıl işlem uygulanmıştır. Sentezlenen tozun karakterizasyonu, X-ışını kırınımı (XRD), taramalı elektron mikroskobu (SEM), enerji dağılım spektrofotometresi (EDS) ve yaş analiz yöntemleri ile gerçekleştirilmiştir. XRD analizine göre 1/3,3 toz bilya ağırlık oranında ve 600 dakika öğütme sonucunda elde edilen üründe elementel bor fazına rastlanmıştır. Yapılan seçici çözelti saflaştırma işlemlerinden sonra XRD, EDS ve yaş analiz sonuçları safsızlıkların dikkate değer ölçüde giderildiğini göstermiştir. Yaş analiz yöntemi ile borun safiyeti %95 olarak belirlenmiştir.Anahtar Kelimeler: Bor oksit, elementel bor, liç, mekanokimyasal sentez SYNTHESIS AND CHARACTERIZATION OF ELEMENTAL BORON FROM BORON OXIDE BY MECHANOCHEMICAL METHOD ABSTRACTIn this study, synthesis and characterization of elemental boron which is one of the high valuable boron-end products were carried out by mechanochemical method starting from anhydrous boron oxide. Metalic magnesium powder was used in the reducing process. Boron oxide and magnesium which has different grinding times and different ratios of reactant was ground at inert atmosphere and room temperature. The milled powder was applied to the heat treatment in an oven. Characterization of the synthesized powder was carried out by XRay Diffractometer (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS) and titration method. According to the XRD analysis, elemental boron phase was observed in an obtained product as a result of 1/3.3 powder to ball weight ratio milled 600 minutes. After the leaching purification process the results of XRD, EDS and titration analysis have shown that impurities was removed at significant rate. Purity of elemental boron has been determined as 95% by titration method.

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Effect of high-energy ball milling time on structural and magnetic properties of nanocrystalline cobalt ferrite powders

Cited by 35 publications

References 20 publications

Preparation and microwave absorbing properties in the X-band of natural ferrites from iron sands by high energy milling

Preparation and microwave absorbing properties in the X-band of natural ferrites from iron sands by high energy milling

Effect of mechanical attrition on microstructure and property of electroplating of copper plating in acid solution

Mekanoki̇myasal Yöntemle Bor Oksi̇tten Elementel Bor Sentezlenmesi̇ Ve Karakteri̇zasyonu

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