Structure and Magnetostriction of Tb0.7Pr0.3FeX Prepared by Solid-State Synthesis

2012 ◽  
Vol 476-478 ◽  
pp. 1459-1462 ◽  
Author(s):  
H.Y Yin ◽  
J.J Liu ◽  
R Wang ◽  
X.C Liu ◽  
N.K Sun ◽  
...  
Keyword(s):  
Solid State ◽  
Mechanical Alloying ◽  
Annealing Process ◽  
Laves Phase ◽  
Type Structure ◽  
Solid State Synthesis ◽  
X Ray Diffraction ◽  
Standard Strain ◽  
X Ray ◽  
Magnetoelastic Properties

Mechanical alloying (MA) was used to prepare pseudobinary high Pr-content Tb0.7Pr0.3Fex alloys. The structural and magnetoelastic properties were in investigated by means of x-ray diffraction and a standard strain technique. A single (Tb,Pr)Fe2 Laves phase with MgCu2-type structure for the composition Tb0.7Pr0.3Fe1.80 was synthesized by MA and subsequent annealing process. The high magnetostriction of 600 ppm was achieved at 10 kOe for the epoxy-bonded Tb0.7Pr0.3Fe1.8 composite.

Study on the Preparation Technique and Magnetostriction of Sinter Tb0.7Pr0.3Fe1.80 Alloy

2012 ◽  
Vol 189 ◽  
pp. 152-156
Author(s):  
H.Y. Yin ◽  
X. Liu ◽  
R. Wang ◽  
Jin Jun Liu ◽  
R.R. Lin ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Laves Phase ◽  
Type Structure ◽  
Preparation Technique ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
Standard Strain ◽  
X Ray ◽  
Magnetoelastic Properties ◽  
Composite Samples

Mechanical alloying (MA) and subsequent solid sintering process was used to prepare the Pr-containing pseudobinary Tb0.7Pr0.3Fe1.80alloys. The structural and magnetoelastic properties were in comparative investigated by means of x-ray diffraction and a standard strain technique for sinter and composite samples. The high Pr-content (Tb,Pr)Fe2Laves phase with MgCu2-type structure for the composition Tb0.7Pr0.3Fe1.80 were synthesized by MA plus annealing at 500 °C.

Solid state synthesis of LiFePO4 studied by in situ high energy X-ray diffraction

2011 ◽  
Vol 21 (15) ◽  
pp. 5604 ◽  
Author(s):  
Zonghai Chen ◽  
Yang Ren ◽  
Yan Qin ◽  
Huiming Wu ◽  
Shengqian Ma ◽  
...  
Keyword(s):  
Solid State ◽  
High Energy ◽  
Solid State Synthesis ◽  
X Ray Diffraction ◽  
X Ray

Fabrication of PbO-Type Structure β-FeSe Superconductor Ceramics by Solid State Reaction Method

2013 ◽  
Vol 790 ◽  
pp. 21-24
Author(s):  
Yun Yi Wu ◽  
Jian Gao ◽  
Tao Li ◽  
Zhi Qiang Hua
Keyword(s):  
Solid State ◽  
High Vacuum ◽  
Secondary Phase ◽  
Vacuum State ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Solid State Sinter ◽  
Metallic Behavior ◽  
X Ray ◽  
Sinter Method

PbO-type structure β-FeSe superconductor ceramic were successfully prepared by solid state sinter method in high vacuum state. The structures of the ceramics were investigated by X-ray diffraction and scanning electron microscopy. X-ray diffraction indicates that the sample prepared by two-steps method exhibited a much improved crystallinity. And as sintering temperature increases to 700°C, secondary phase Fe7Se8 phase peak disappear and α-Fe peak weakened. Besides, the ceramic prepared in 700°C exhibited a denser surface morphology in comparison to that prepared in 410°C and its composition is closer to the chemical formula FeSe according to EDX compositional analyses. It was noted that the resistivity of the sample, sintered at 700°C using two-steps sinter method, shows a linear metallic behavior from room temperature and onset is around T = 7.5 K.

Solid-state synthesis and X-ray diffraction studies of Na2S

1990 ◽  
Vol 85 (2) ◽  
pp. 283-292 ◽  
Author(s):  
M. Kizilyalli ◽  
M. Bilgin ◽  
H.M. Kizilyalli
Keyword(s):  
Solid State ◽  
Solid State Synthesis ◽  
X Ray Diffraction ◽  
X Ray

Preparation of Forsterite by Solid State Synthesis Process and its Dielectric Properties

2012 ◽  
Vol 534 ◽  
pp. 110-113 ◽  
Author(s):  
Fei Shi ◽  
Peng Cheng Du ◽  
Jing Xiao Liu ◽  
Ji Wei Wu ◽  
Chun Yuan Luo
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Single Phase ◽  
Raw Materials ◽  
Magnesium Carbonate ◽  
Solid State Synthesis ◽  
Molar Ratio ◽  
Synthesis Process ◽  
X Ray Diffraction ◽  
X Ray

Using basic magnesium carbonate (Mg(OH)2•4MgCO3•6H2O) and SiO2 as raw materials, forsterite (Mg2SiO4) was prepared by solid state synthesis process. The optimal process for synthesizing Mg2SiO4 was obtained by adjusting Mg/Si molar ratio and sintering temperature. The crystal phase of the obtained Mg2SiO4 powder was determined by X-ray diffraction (XRD). The results indicate that the single-phase Mg2SiO4 powder can be obtained when the mixtures with Mg/Si molar ratio of 2.05～2.01 were sintered at 1350°C for 3h in the air. The as-prepared Mg2SiO4 ceramic samples which were sintered at 1300～1360°C showed better dielectric properties with εr=7.4 and tanδ =7.5×10-4.

scholarly journals Synthesis and crystal structure of two new phosphates with Alluaudite type structure: (M, Mn)3Fe(PO4)3 (M= Ca, Cd)

2018 ◽  
Vol 149 ◽  
pp. 01084 ◽  
Author(s):  
Ghaleb Alhakmi ◽  
Abderrazzak Assani ◽  
Mohamed Saadi ◽  
Lahcen El Ammari
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Monoclinic System ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Open Framework ◽  
Bivalent Cations ◽  
The Common

Two new phosphates with alluaudite type structure (M, Mn)3Fe(PO4)3 (M= Ca, Cd), namely Ca1.54Mn1.46Fe(PO4)3 and Cd0.66Mn2.34Fe(PO4)3, has been synthesized by a solid state reaction and characterized by single-crystal X-ray diffraction. The two compounds crystallize in the monoclinic system with C2/c space group. Their open framework results from (Fe1/Mn1)2O10 units of edge-sharing (Fe/Mn)O6 octahedra, which alternate with M(1)O6 octahedra (M(1)=Ca1/Mn2 or Cd1/Mn2) that form infinite chains running along [10-1] direction. These chains are linked together through the common corners of PO4 tetrahedra giving rise to two types of tunnels occupied by bivalent cations Ca2+ or Cd2+ and Mn2+.

Ammonium fluorolanthanates: solid state synthesis, infrared spectral and X-ray diffraction data

1977 ◽  
Vol 55 (14) ◽  
pp. 2620-2627 ◽  
Author(s):  
Krishnan Rajeshwar ◽  
Etalo A. Secco
Keyword(s):  
Solid State ◽  
Absorption Spectra ◽  
Diffraction Data ◽  
Decomposition Product ◽  
Solid State Synthesis ◽  
Synthesis Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Final Decomposition Product ◽  
Infrared Spectral

Solid state synthesis of thirteen ammonium fluorolanthanates is reported. Two main types of fluorolanthanates appeared in the primary synthesis reaction, viz. NH4LnF4 and (NH4)3Ln2F9.The final decomposition product of the fluorolanthanates is LnF3 with NH4Ln2F7 appearing as an intermediate in (NH4)3Ln2F9 decomposition.Infrared absorption spectra and X-ray diffraction data for the stable fluorolanthanates are presented.

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