Study of Morphology and Magnetic Properties of Nanosized Particles of Zirconium – Cobalt Substituted Calcium Hexaferrites

Deshpande, A.D.; Rewatkar, K. G.; Nanoti, Vivek M.

doi:10.1016/j.matpr.2017.09.147

Cited by 12 publications

(7 citation statements)

References 12 publications

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“…This type of behavior was observed [21]. The large value of dielectric constant ε' for small frequency due to polarization in dielectric structure, porosity, grain boundaries [22]. Better dc conductivity increases the performance of LiTiP 2 O 7 as shown in Fig.…”

Section: Fourier Transfer Infrared Spectra (Ftir) Analysis:-mentioning

confidence: 60%

Development and Characterization of Titanium Phosphates (Tip2o7) and Lithium Titanium Phosphate (Litip2o7) and Their Thermal and Electric Properties.

Vaidyanath¹,

Ashamanjari²,

Mahesh³

et al. 2017

IJAR

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In this present study, the Titanium phosphates (TiP 2 O 7 ) and Lithium titanium phosphate (LiTiP 2 O 7 ) materials were synthesized by using soft hydrothermal method at moderate pressure and temperature conditions. The resultant materials were characterized by using P-XRD, SEM, EDAX, FTIR, TGA, DSC and Electrochemical impedance spectra (EIS). From P-XRD, confirms the well crystalline rhombohedral phase and was found to be in the range below 100 nm. FTIR spectra indicated that there is an increase in the degree of splitting and stretching of the vibration bands, whereas the splitting of vibration bands and polymerization of [PO 4 ] decreased as the Ti ions. The TGA/DSC studies revealed that, these materials display endothermic reactions due to the liberation of ligands and diffusion. Thermal stability of the materials improved and the dielectric constant decreases. AC conductivity measurements for both the samples were carried and results are plotted. From AC conductivity studies, it is observed that the ionic conductivity of dc conductance of sample was measured show the frequency dependence dc capacitance of LiTiP 2 O 7 material. The frequency response dc capacitance also depends on doping with titanium.

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Section: Fourier Transfer Infrared Spectra (Ftir) Analysis:-mentioning

confidence: 60%

Development and Characterization of Titanium Phosphates (Tip2o7) and Lithium Titanium Phosphate (Litip2o7) and Their Thermal and Electric Properties.

Vaidyanath¹,

Ashamanjari²,

Mahesh³

et al. 2017

IJAR

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“…Prepared powders are loose, foamy, pores and highly friable. The samples crushed into powder using agate motor were sintered at 900 °C for four hours and allowed to cool gradually on sand bath [19][20][21].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The decrease in the value of coercivity, Hc with increase in the value of x can be attributed to lowering of magneto crystalline anisotropy according to M.V. Cabanas et al [20,21].…”

Section: Magnetic Studiesmentioning

confidence: 96%

Synthesis and Characterization of Nano-Hexagonal Calcium Ferrites

Rajashekara¹

2020

JNST

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The comparative study of substituted calcium hexaferrites samples with chemical composition CaCrxFe12-xO19 where, x= 0,2,4,6 have been chosen for their studies on structural and magnetic properties. Structural and morphological properties are studied by X-ray diffraction technique and scanning electron microscopy (SEM). The XRD pattern confirmed that the formation of single phase hexagonal ferrites with space group P63/mmc 167:R-3c. The SEM results confirms that the sample exhibit relatively well defined hexagonal like grains with average particle size found in between 24 to 40 nm. Magnetic characterization of the samples is carried out using vibrating sample magnetometer (VSM). The saturation magnetization (Ms), remanence (Mr) and coercivity (Hc) are found to decrease with increase in the value of substitution which is attributed to the occupation of sub lattice spin-up and spin-down sites by diamagnetic ions and anisotropy. The samples have a better signal-to-noise ratio, as the particle size was less than 50 nm, when calculated by Debye-Scherer formula and may be suitable for recording media.

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“…Metode keramik konvensional seperti, high energy ball milling dan proses kimia seperti kopresipitasi, proses hidrotermal, proses sol-gel banyak digunakan untuk mendapatkan kualitas barium heksaferit yang tinggi [4][5][6][7]. Metode kimia seperti metode ko-presipitasi memiliki keunggulan antara lain, cara pembuatan yang relatif sederhana, namun bisa menghasilkan homogenitas partikel cukup tinggi dan distribusi ukuran partikel dalam kisaran nanometer, sehingga proses kristalisasi dan pertumbuhan kristal partikel dilakukan pada suhu relatif rendah [3,8].…”

Section: Pendahuluanunclassified

“…Terdapat beberapa penelitian dan publikasi ilmiah untuk memahami pengaruh substitusi terhadap sifat listrik dan magnet dari bahan barium heksaferit [1,2,6,8,9]. Struktur dan sifat-sifat magnet Ba heksaferit dapat diubah dengan cara mensubstitusi ion logam Fe 3+ dengan beberapa ion logam lain yang memiliki ion divalent atau tetravalent seperti, Nb 2+ , Zn 2+ , Zr 4+ , Ti 4+ .…”

Section: Pendahuluanunclassified

STRUKTUR DAN SIFAT KEMAGNETAN NANOPARTIKEL HEKSAFERIT BaFe(12-2X)(MnNi)XO19 HASIL KOPRESIPITASI

Winatapura

Deswita

Sudrajat

2017

jsmi

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0,3; 0,7; 1,0) telah berhasil disintesis. Tujuan dari penelitian ini adalah untuk membuat heksaferit BaFe (12-2x) (MnNi) x O 19 dan mengamati pengaruh konsentrasi doping ion Mn dan Ni di dalam bahan heksaferit terhadap perilaku struktur dan sifat magnet. Heksaferit BaFe (12-2x) (MnNi) x O 19 dibuat dari bahan dasar Fe(NO 3 ) 3 , Ba(NO 3 ), Mn(NO 3 ) dan Ni(NO 3 ) dengan metoda kopresipitasi, yang kemudian diikuti perlakuan panas pada suhu 925 o C selama 3 jam. Produk BaFe (12-2x) (MnNi) x O 19 yang dihasilkan kemudian dikarakterisasi menggunakan peralatan difraktometer sinar-X (XRD), Scanning Electron Microscope (SEM), Vibrating Sample Magnetometer (VSM) dan Fourier Transform-Infra Red (FT-IR). Data XRD yang dihasilkan dianalisis menggunakan program General Structure Analysis System (GSAS). Hasil refinement XRD menunjukkan bahwa substitusi ion-ion Ni dan Mn kedalam Ba heksaferit dapat mengubah perilaku parameter struktur, seperti parameter kisi, volume unit sel dan kerapatan atom. Bentuk dan distribusi ukuran partikel Ba heksaferit mengalami perubahan dengan penambahan doping ion Mn dan Ni. Demikian pula , perilaku sifat kemagnetan seperti koersivitas intrinsik (H ci ), magnet saturasi (M s ) dan magnet remanen (M r ) dari Ba heksaferit hasil substitusi berubah dengan penambahan substitusi ion-ion Ni dan Mn. 0.3; 0.7; 1.0) hexaferrite nanoparticle has been successfully synthesized. The purpose of this study is to synthesize BaFe (12-2x) (MnNi) x O 19 heksaferit and to study the effect of Mn and Ni ion doping concentration in hexaferrite to the parameter structure and the magnetic properties. BaFe (12-2x) (MnNi) x O 19 hexaferrite was prepared made from Fe(NO 3 ) 3 , Ba(NO 3 ), Mn(NO 3 ) dan Ni(NO 3 ) raw materials using co-precipitation method, which is then followed by heat treatment at 925 o C during 3 hours. The product is then characterized using X-Ray Diffraction Apparatus (XRD), Scanning Electron Microscope (SEM), Vibrating Sample Magnetometer (VSM) and Fourier Transform-Infra Red (FT-IR). XRD data were analyzed using a general program structure analysis system (GSAS). The XRD refinement result showed that the substitution of Ni and Mn ions into the hexaferrite can change the behavior of structural parameters, such as lattice parameters, unit cell volume and the atomic density. The particle size distribution and shape of hexaferrrite changed with the addition of Mn and Ni ion doping. Similarly, the behavior of magnetic properties such as intrinsic coercivity (H ci ), magnetic saturation (M s ) and magnetic remanence (M r ) of substituted hexaferrite change with the addition of Ni and Mn ions.

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Study of Morphology and Magnetic Properties of Nanosized Particles of Zirconium – Cobalt Substituted Calcium Hexaferrites

Cited by 12 publications

References 12 publications

Development and Characterization of Titanium Phosphates (Tip2o7) and Lithium Titanium Phosphate (Litip2o7) and Their Thermal and Electric Properties.

Development and Characterization of Titanium Phosphates (Tip2o7) and Lithium Titanium Phosphate (Litip2o7) and Their Thermal and Electric Properties.

Synthesis and Characterization of Nano-Hexagonal Calcium Ferrites

STRUKTUR DAN SIFAT KEMAGNETAN NANOPARTIKEL HEKSAFERIT BaFe(12-2X)(MnNi)XO19 HASIL KOPRESIPITASI

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