Analysis of Physical Properties, Crystal Structure and Magnetic Properties of Barium Hexaferrite Doped with 2 % wt. of SrO and Prepared by Coprecipitation Method

2019 ◽  
Vol 966 ◽  
pp. 325-330
Author(s):  
Suprapedi ◽  
Muljadi ◽  
Djuhana ◽  
Ramlan
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Physical Properties ◽  
Single Phase ◽  
Raw Materials ◽  
Fine Powder ◽  
Barium Hexaferrite ◽  
Xrd Analysis ◽  
Coprecipitation Method ◽  
Distilled Water

The purpose of this study is to determine the effect of the addition of 2 % SrO on physical, magnetic properties and crystal structure of BaO6Fe2O3. In this study, the coprecipitation method was used with raw materials BaCl2, FeCl3 and SrCl3 and Ba-ferrite composition is used based on the ratio of mole BaO: Fe2O3 = 1: 6, while SrO is used 2% of the weight of Ba-ferrite. The raw materials are dissolved in distilled water, then added a solution (50%) of ammonia to form a perfect precipitate. The precipitate after filtering was dried in an oven at 100°C until dry, then crushed with mortar and partially taken for analysis with DTA / TG. The fine powder was calcined at 800 ° C and held for one hour using an electric furnace. The calcined samples were crushed with mortar and fine powder was added 1% wt.of PVA adhesive and formed with a pressure of 40 MPa to obtaine a pellet sample. The pellet samples were then sintered at 1150°C and hold for 1 hour. Furthermore, the sintered samples were characterized such as measurement of bulk density, magnetic properties with gauss meters and VSM and measurements with XRD. The results of characterization show that the addition of additives 2% of SrO can provide an increase in physical properties and magnetic properties (remanence). But for the crystal structure of XRD analysis there is no change, a single phase is formed, namely BaFe12O19.

scholarly journals CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES OF TbTSn COMPOUNDS (T = Pt and Rh)

2018 ◽  
Vol 34 (2) ◽  
Author(s):  
Kim Anh Do Thi
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Physical Properties ◽  
Powder Diffraction ◽  
Measurement System ◽  
Single Phase ◽  
Magnetic Transition ◽  
Rietveld Analysis ◽  
X Ray ◽  
Arc Melting

The TbTSn compounds (T = Pt, Rh) have been prepared by arc-melting in purified Ar atmosphere. Crystal structures were studied by X-ray powder diffraction. The Rietveld analysis shows the single phase in hexagonal ZrNiAl-type structure for TbPtSn and TbRhSn compounds. Magnetic properties and specific heat measured by mean of Physical Properties Measurement System (PPMS) demonstrated the phase magnetic transition at Néel temperature TN

Crystal structure and magnetic properties study on barium hexaferrite (BHF) and cobalt zinc ferrite (CZF) in composites

2021 ◽  
Vol 113 ◽  
pp. 106529
Author(s):  
Murli Kumar Manglam ◽  
Jyotirekha Mallick ◽  
Suman Kumari ◽  
Rabichandra Pandey ◽  
Manoranjan Kar
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Zinc Ferrite ◽  
Barium Hexaferrite ◽  
Cobalt Zinc Ferrite

scholarly journals Structural, Magnetic, and X-Band Microwave Absorbing Properties of Ni-Ferrites Prepared Using Oxidized Mill Scales

2021 ◽  
Vol 21 (1) ◽  
pp. 27
Author(s):  
Ardita Septiani ◽  
Novrita Idayanti ◽  
Tony Kristiantoro ◽  
Dedi Mada ◽  
Nadya Larasati Kartika ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Phase ◽  
Raw Materials ◽  
Energy Dispersive Spectrometer ◽  
Milling Process ◽  
Microwave Properties ◽  
Heating Process ◽  
Microwave Absorbing Properties ◽  
X Band ◽  
Microwave Absorbing

This study aims to evaluate the structural, magnetic, and microwave absorbing properties at the X-band region of oxidized mill scales as by-product derived from a steel making process by means of a facile solid-state reaction. The oxidized mill scales were heated at 600 °C for 4 h followed by mixing with NiO. A calcination process took place at 900 °C and sintering process were conducted at 1260 °C with a milling process conducted in between the heating process. X-ray diffraction (XRD) and scanning electron microscope (SEM) equipped with energy dispersive spectrometer (EDS) were employed to evaluate the structural properties of the Ni-ferrites samples. Remacomp measurement were conducted to evaluate the magnetic properties and vector network analyzer (VNA) to measure its microwave properties. A single phase of NiFe2O4 was confirmed by XRD data. The site occupancies derived from the Rietveld refinement shows that the Ni:Fe:O ratio deviates from the 1:2:4 ratio as that suggests vacancies formed in the Ni2+ and Fe3+ that lowers the unit cell density to 5.08 g/cm3 that further confirmed by EDS measurement. The coercivity of 11 kOe is also higher than the bulk NiFe2O4¬ prepared by the chemical grade raw materials. The reflection data of the microwave properties at X-band of 8-12 GHz do not shows significant absorptions. This study suggests that the selected preparation method yields a single phase, however with the significant crystallographic defects and has less ‘soft’ magnetic properties compared to NiFe2O4 prepared using chemical grade by previous study.

Preparation and Electrochemical Performance of Praseodymium Doped SnO2 Particles as Negative Electrode Material of Lithium-Ion Battery

2014 ◽  
Vol 492 ◽  
pp. 370-374
Author(s):  
Xiao Zhen Liu ◽  
Guang Jian Lu ◽  
Xiao Zhou Liu ◽  
Jie Chen ◽  
Han Zhang Xiao
Keyword(s):  
Lithium Ion Battery ◽  
Electrode Material ◽  
Electrode Materials ◽  
Raw Materials ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Xrd Analysis ◽  
Coprecipitation Method ◽  
Negative Electrode Material

Pr doped SnO2 particles as negative electrode material of lithium-ion battery are synthesized by the coprecipitation method with SnCl4·5H2O and Pr2O3 as raw materials. The structure of the SnO2 particles and Pr doped SnO2 particles are investigated respectively by XRD analysis. Doping is achieved well by coprecipitation method and is recognized as replacement doping or caulking doping. Electrochemical properties of the SnO2 particles and Pr doped SnO2 particles are tested by charge-discharge and cycle voltammogram experimentation, respectively. The initial specific discharge capacity of Pr doped SnO2 the negative electrode materials is 676.3mAh/g. After 20 cycles, the capacity retention ratio is 90.5%. The reversible capacity of Pr doped SnO2 negative electrode material higher than the reversible capacity of SnO2 negative electrode material. Pr doped SnO2 particles has good lithiumion intercalation/deintercalation performance.

Microstructure and Magnetic Properties of RE2.28Fe13.58B1.14 Alloys

2016 ◽  
Vol 848 ◽  
pp. 709-714 ◽  
Author(s):  
Gang Fu ◽  
Jiang Wang ◽  
Mao Hua Rong ◽  
Guang Hui Rao ◽  
Huai Ying Zhou
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Rare Earth ◽  
Single Phase ◽  
Permanent Magnets ◽  
Industrial Applications ◽  
Arc Melting ◽  
Light Rare Earth Elements ◽  
Curie Temperatures ◽  
Microstructure And Magnetic Properties

The rare-earth (RE) permanent magnets based on Nd2Fe14B with excellent magnetic properties have been widely used in industrial applications. In this work, the crystal structure, microstructure and magnetic properties of Nd2.28Fe13.58B1.14, Ce2.28Fe13.58B1.14 and Pr2.28Fe13.58B1.14 alloys prepared by arc-melting were investigated. The results show that all alloys are single phase with tetragonal Nd2Fe14B-type (space group P42/mnm). The Curie temperatures (Tc) of RE2.28Fe13.58B1.14 (RE=Nd, Ce, Pr) alloys are 583 K, 423 K and 557 K, respectively. On the other hand, the coercivities of Nd2.28Fe13.58B1.14 and Pr2.28Fe13.58B1.14 alloys are about 1.05 T and 1.23 T, respectively, while that of Ce2.28Fe13.58B1.14 alloy is only about 0.25 T due to the poor squareness of hysteresis loop. Meanwhile, the saturation magnetizations of Nd2.28Fe13.58B1.14 and Pr2.28Fe13.58B1.14 alloys are about 135 emu/g and 113 emu/g, respectively, while that of Ce2.28Fe13.58B1.14 alloy is about 97 emu/g. It was indicated that the Curie temperatures and magnetic properties of RE2.28Fe13.58B1.14 alloys with the same crystal structure are dependent on light rare earth elements.

A novel blue luminescent material Na2[Co(C2O4)2(H2O)2]·6H2O: synthesis, structure, luminescence and magnetic properties

2016 ◽  
Vol 45 (20) ◽  
pp. 8500-8505 ◽  
Author(s):  
A. Saritha ◽  
B. Raju ◽  
M. Narsimhulu ◽  
D. Narayana Rao ◽  
P. Raghavaiah ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Physical Properties ◽  
Luminescent Material

The synthesis, crystal structure and physical properties of new disodium trans-diaquabis(oxalato)cobaltate(ii)hexahydrate {Na2[Co(C2O4)2(H2O)2]·6H2O} crystals have been investigated.

Karakterisasi Struktur Kristal dan Sifat Magnetik Magnet Stronsium Ferit Pasir Besi Batang Sukam Kabupaten Sijunjung Sumatera Barat

2017 ◽  
Vol 1 ◽  
pp. 38
Author(s):  
Arif Budiman ◽  
Dwi Puryanti ◽  
Sri Mulyadi Dt. Basa ◽  
Muhammad Rizki ◽  
Helfi Syukriani
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Single Phase ◽  
Oxidation Process ◽  
Strontium Ferrite ◽  
X Ray Diffraction ◽  
Hexagonal Crystal ◽  
X Ray

<p><strong>Abstract:</strong> The synthesis and characterization of the crystal structure and magnetic properties of strontium ferrite magnets (SrO.6Fe<sub>2</sub>O<sub>3</sub>) has been done. Hematite (Fe<sub>2</sub>O<sub>3</sub>) is synthesized from iron sand of Batang Sukam Sijunjung Sumatera Barat through the oxidation process by temperature 700ºC for 3.0 hours. Strontium carbonate (SrCO<sub>3</sub>) was obtained from Merck product with a purity of more than 99%. Synthesis of strontium ferrite magnets are made through a process of solid-solid mixing and sintering at a temperature of 1000ºC for 3.0 hours. The results of characterization of X-ray diffraction indicates that it has formed a single phase strontium ferrite magnets with a hexagonal crystal structure. The result of measurement of the magnetic properties shows that an average magnetic susceptibility of strontium ferrite magnet is 266.7 × 10<sup>-8 </sup>m<sup>3</sup> /kg.</p><p> </p><p><strong>Keywords</strong>: strontium ferrite magnet, iron sand, crystal structure and magnetic susceptibility.</p><p><strong> </strong></p><p><strong>Abstrak:</strong> Telah dilakukan sintesis dan karakterisasi struktur kristal dan sifat magnetik magnet stronsium ferit (SrO.6Fe<sub>2</sub>O<sub>3</sub>). Hematit (Fe<sub>2</sub>O<sub>3</sub>) disintesis daripasir besi Batang Sukam Kabupaten Sijunjung Sumatera Barat melalui proses oksidasi dengan temperatur 700ºC selama 3,0 jam. Stronsium karbonat (SrCO<sub>3</sub>) diperoleh dari produk Merck dengan kemurnian lebih dari 99 %. Sintesis magnet stronsium ferit dibuat melalui proses <em>solid-solid mixing</em> dan disintering pada suhu 1000ºC selama 3,0 jam. Hasil karakterisasi difraksi sinar-X menunjukkan bahwa telah terbentuk <em>single phase</em> magnet stronsium ferit dengan struktur kristal heksagonal. Hasil pengukuran sifat magnet menunjukkan bahwa magnet stronsium ferit memiliki suseptibilitas magnetik rata-rata 266,7 × 10<sup>-8</sup> m<sup>3</sup>/kg.</p><p> </p><p><strong>Kata Kunci:</strong> magnet stronsium ferit, pasir besi, struktur kristal dan suseptibilitas magnetik.</p>

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