Controlling polymorphic structures and investigating electric properties of Ca-doped zirconia using solid state ceramic method

2015 ◽  
Vol 228 ◽  
pp. 153-159 ◽  
Author(s):  
W.I. Emam ◽  
Ahmed F. Mabied ◽  
H.M. Hashem ◽  
M.M. Selim ◽  
A.M. El-Shabiny ◽  
...  
2021 ◽  
Vol 410 ◽  
pp. 714-719
Author(s):  
Denis Vinnik ◽  
Santhoshkumar Mahadevan ◽  
Puneet Sharma

Magnetic properties of Co, Ni and Zn substituted barium hexaferrite (BaM) samples prepared by solid state ceramic method were studied. Saturation magnetisation were found higher for Zn-substituted BaM, whereas, coercivity is higher for Co2+ and Ni2+ ion substituted samples. Anisotropy field for all substituted samples was calculated by the law of approaching saturation. Remanence, squareness and thermomagnetic plot suggest Zn2+ ions restricts the magnetic interaction of various sites in BaM.


Author(s):  
Jibi John ◽  
V.P Mahadevan Pillai ◽  
Anitta Rose Thomas ◽  
Reji Philip ◽  
Jaison Joseph ◽  
...  

AIAA Journal ◽  
2001 ◽  
Vol 39 ◽  
pp. 1354-1362
Author(s):  
Aydin Dogan ◽  
James Tressler ◽  
Robert E. Newnham
Keyword(s):  

2007 ◽  
Vol 9 (11) ◽  
pp. 1033-1035 ◽  
Author(s):  
Jing Feng ◽  
Shuyan Qi ◽  
Xiangyu Hou ◽  
Milin Zhang

2019 ◽  
Vol 90 (8) ◽  
pp. 083904 ◽  
Author(s):  
Shuang Shuang ◽  
Honghua Li ◽  
Gang He ◽  
Yong Li ◽  
Jiangtao Li ◽  
...  

2014 ◽  
Vol 805 ◽  
pp. 254-259
Author(s):  
Vera Lúcia Othéro de Brito ◽  
Stéphanie Alá Cunha ◽  
Ana Paula Ribeiro Uchoas ◽  
Fabiana Faria de Araújo ◽  
Cristina Bormio Nunes ◽  
...  

Cobalt and cobalt-manganese spinel ferrites have magnetostrictive properties suitable for application in magneto-electric and magneto-mechanical transducers. In this work, copper-substituted ferrites of these compositions were processed by means of the ceramic method and their sinterabilities were evaluated by dilatometric thermal analyses. The results obtained suggest that copper affects the solid-state reactions for the spinel formation and lowers the required sintering temperature for the ferrites. However, the densification obtained with sintering of the copper-substituted ferrites at 950oC for 6h was only 64%, which indicates that further adjustments on the processing route must be made in order to obtain higher densities.


2013 ◽  
Vol 582 ◽  
pp. 71-75
Author(s):  
Ichiro Fujii ◽  
Atsushi Shimamura ◽  
Kouichi Nakashima ◽  
Nobuhiro Kumada ◽  
Hiroshi Funakubo ◽  
...  

Bismuth and niobium based perovskite oxides with non-integer A and B site valences were prepared by a solid-state route. For the A1+xB5xO3 type (Bix/2K1-x/2)(TixNb1-x)O3 (x=0.1 0.9) ceramics (the examples of samples studied), the Curie temperature increased from approximately 250 to 350 °C with increasing x from 0.5 to 0.9. These results were discussed with the Abrahams relations.


2020 ◽  
Vol 15 (2) ◽  
pp. 197-203
Author(s):  
Yujie Sun ◽  
Xia Yang ◽  
Yue Huang ◽  
Jianquan Li ◽  
Xinghua Cen ◽  
...  

In this study, we investigated the influence of MnTiO3 nanoparticles additive on hydrogen released performance of NaAlH4 for the first time. The MnTiO3 nanoparticles were successfully synthesized using conventional solid-state ceramic route. It was found that the hydrogen released performance of NaAlH4 can be significantly improved by the addition of MnTiO3 nanoparticles. Meantime, the composite of NaAlH4 doped 5 wt% MnTiO3 possessed excellent dehydrogenation properties, the onset dehydrogenation temperature was only 70.6 °C, reduced by about 105 °C in comparison with the pristine NaAlH4, and approximately 5.01 wt% of hydrogen could be released from composite with temperature heated to 220 °C. The isothermal dehydrogenation test results indicated that the amount of hydrogen released by NaAlH4-5 wt% MnTiO3 composite could reach 4.4 wt% under 200 °C within 25 min. According to the analysis of X-ray diffraction, the presence of MnTiO3 nanoparticles did not alter the overall dehydrogenation pathway of NaAlH4, and the Al3 Ti phases formed after dehydrogenation, which enhanced hydrogen desorption performances of NaAlH4 .


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