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
2011 ◽  
Vol 21 (15) ◽  
pp. 5604 ◽  
Author(s):  
Zonghai Chen ◽  
Yang Ren ◽  
Yan Qin ◽  
Huiming Wu ◽  
Shengqian Ma ◽  
...  

2012 ◽  
Vol 476-478 ◽  
pp. 1459-1462 ◽  
Author(s):  
H.Y Yin ◽  
J.J Liu ◽  
R Wang ◽  
X.C Liu ◽  
N.K Sun ◽  
...  

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.


2012 ◽  
Vol 534 ◽  
pp. 110-113 ◽  
Author(s):  
Fei Shi ◽  
Peng Cheng Du ◽  
Jing Xiao Liu ◽  
Ji Wei Wu ◽  
Chun Yuan Luo

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.


1977 ◽  
Vol 55 (14) ◽  
pp. 2620-2627 ◽  
Author(s):  
Krishnan Rajeshwar ◽  
Etalo A. Secco

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.


1994 ◽  
Vol 349 ◽  
Author(s):  
B. Morosin ◽  
Joshua Jacobs ◽  
Craig Henderson ◽  
James E. Schirber

ABSTRACTWe have demonstrated the direct solid state synthesis of C60H2 by controlling the amount of hydrogen introduced into the reaction with C60. Palladium hydride has been used as the source of hydrogen. The main product 1,2-C60H2 is the isomer previously predicted by computational studies to be the lowest in energy of the possible 23 isomers; in addition, small amounts of the thermodynamically most stable isomer of C60H2, 1,2,3,4-C60H2, has also been obtained. To determine structural parameters by x-ray diffraction, crystal growth from various solvents yielded complex solventcontaining crystals which were examined; however, the complex nature of these crystals have so far precluded detailed crystal structure determinations.


2007 ◽  
Vol 366 (1-2) ◽  
pp. 52-57 ◽  
Author(s):  
D. Bregiroux ◽  
R. Belin ◽  
P. Valenza ◽  
F. Audubert ◽  
D. Bernache-Assollant

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