Effect of Ti-Doped on Y134 Superconductor

2016 ◽  
Vol 851 ◽  
pp. 42-45
Author(s):  
Rattanasuda Supadanaison ◽  
Theerathawan Panklang ◽  
Chalit Wanichayanan ◽  
Warayut Srithongsuk ◽  
Jaturong Junrear ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Sintering Temperature ◽  
Solid State Reaction Method ◽  
Peritectic Temperature ◽  
Reaction Method ◽  
Melting Area ◽  
Ti Doping

We investigated some properties of Y134 superconductor doped Ti superconductor. The series of samples of Y134 doped Titanium (YBa3Cu4TixO9-δ) which x=0, 0.05, 0.10, 0.15, 0.20, 0.25 were prepared by solid state reaction method with calcinations and sintering temperature at 980 °C. The porosity was reduced and the melting area were found for all Ti-doped samples. There was a little effect of Ti-doped on Tc onset but the lower of Tc offset were found that agree with the melting found on surface of sample with Ti-doped. The peritectic temperature of Y134 powder, and Y134 + 0.10Ti were on the same range about with more peak area of pure Y134 than Y134 with Ti-doping.

Effects of Mg2SiO4 Addition on the Microstructure and Dielectric Properties of MgTiO3-CaTiO3 Ceramics

2013 ◽  
Vol 675 ◽  
pp. 200-204
Author(s):  
Fei Shi ◽  
Peng Cheng Du ◽  
Jing Xiao Liu ◽  
Ji Wei Wu ◽  
De Qing Chen ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Solid State ◽  
Dielectric Loss ◽  
Solid State Reaction ◽  
Sintering Temperature ◽  
Solid State Reaction Method ◽  
Composite Ceramics ◽  
Reaction Method ◽  
Dielectric Ceramics

The Mg2SiO4-MgTiO3-CaTiO3 composite dielectric ceramics with different Mg2SiO4 addition amounts were prepared by solid state reaction method. The effects of Mg2SiO4 addition amounts on the microstructure and dielectric properties as well as sintering temperature of xMg2SiO4-(0.95-x)MgTiO3-0.05CaTiO3 (abbreviated as xMSTC, 0.25≦x≦0.75) composite ceramics were investigated. The results indicated that the sintering temperature of MgTiO3-CaTiO3 based ceramics with Mg2SiO4 addition could be lowered effectively to 1320~1340°C, and the dielectric constant decreased and dielectric loss increased gradually with the increase of Mg2SiO4 content. The 0.45MSTC ceramics containing 45 wt% Mg2SiO4 and sintered at 1340°C showed desirable dielectric properties with dielectric constant εr=13.3，dielectric loss tanδ=4.5×10-4 and temperature coefficient of relative permittivity τε =10 ppm/°C.

Effect of the Doping Ni and Overdosing Lithium for Synthesis LiMn2O4 Cathode Material by the Solid State Reaction Method

2013 ◽  
Vol 457-458 ◽  
pp. 93-97
Author(s):  
Yen Chun Liu ◽  
Ming Cheng Liu ◽  
Robert Lian Huey Liu ◽  
Mao Chieh Chi
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
Lithium Battery ◽  
Sintering Temperature ◽  
Solid State Reaction Method ◽  
Attrition Rates ◽  
Reaction Method ◽  
Initial Capacity

The study with Li2CO3 and Mn3O4 through the solid state reaction makes cathode material for lithium battery spinel - LiMn2O4. According to past literature, under the solid-state reaction. The experiment carries out sintering at temperature of 850°C.. Cathode materials under these sintering temperatures are made to fabricate battery. For Ni doped LiMn2O4, the capacitance decreasing speed is slow and stable; after 15 times charging-discharging cycles, the attrition rates were 3.05 % or less. The result of experiment demonstrates that the best sintering temperature is at 850°C. Under the condition of 850°C, various contents for extra amount of lithium (1.02 mole-1.1 mole) are fabricated and range of working voltage is released. It is found a further increase of initial capacity to 140.51 mAh/g. LiMn2O4 further extends circulation and usage.

Synthesis and luminescence of Li2.06Nb0.18Ti0.76O3: Eu3+ Ceramics

2020 ◽  
Vol 13 (05) ◽  
pp. 2051030
Author(s):  
Xi Chen ◽  
Qun Zeng ◽  
Liu Lei ◽  
Chun-Feng Yao ◽  
Chao-Chao Guo ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Fluorescence Spectra ◽  
Sintering Temperature ◽  
Emission Spectra ◽  
Solid State Reaction Method ◽  
Red Emission ◽  
Reaction Method ◽  
Pl Spectra ◽  
Orange Emission

Li[Formula: see text]Nb[Formula: see text]Ti[Formula: see text]O3: Eu[Formula: see text] luminescent ceramics were prepared by the solid-state reaction method. By means of XRD, SEM, density testing, and fluorescence spectra data, the luminescent ceramics were characterized as functions of Eu[Formula: see text] concentration and sintering temperature. With the increase of sintering temperature and Eu[Formula: see text] concentration, the peak intensities of the PLE spectra monitored at 612[Formula: see text]nm and PL spectra excited at 396[Formula: see text]nm were dramatically improved. Li[Formula: see text]Nb[Formula: see text]Ti[Formula: see text]O3: 3[Formula: see text]wt.%Eu[Formula: see text] ceramics sintered at 1120∘C showed the highest PL intensity. The emission spectra showed orange emission at 592[Formula: see text]nm and red emission at 612[Formula: see text]nm, corresponding to the transition of 5D[Formula: see text]F1 and 5D[Formula: see text]F2 of Li[Formula: see text]Nb[Formula: see text]Ti[Formula: see text]O3: Eu[Formula: see text] ceramics.

EFFECT OF SINTERING TEMPERATURE ON THE MICROSTRUCTURE AND THERMOELECTRIC PROPERTIES OF Ca2.7Bi0.3Co4O9

2009 ◽  
Vol 23 (18) ◽  
pp. 3777-3787 ◽  
Author(s):  
HAOSHAN HAO ◽  
SHAOFENG LI ◽  
LIMIN ZHAO ◽  
XING HU
Keyword(s):  
Solid State ◽  
Transport Properties ◽  
Thermoelectric Properties ◽  
Solid State Reaction ◽  
Sintering Temperature ◽  
Solid State Reaction Method ◽  
Conventional Solid State Reaction ◽  
Reaction Method ◽  
Cooling Stage ◽  
Oriented Structure

Ca 2.7 Bi 0.3 Co 4 O 9 samples have been sintered in temperature range of 1183–1243 K by conventional solid-state reaction method. XRD and SEM investigations show that c-axis-oriented structure could be formed in these samples and Lotgering factors increase with the increase of sintering temperature when it is below 1223 K, from 52% for the sample sintered at 1183 K to 86% for the sample sintered at 1223 K. Due to decomposition of Ca 2.7 Bi 0.3 Co 4 O 9, however, the c-axis-oriented structure was destroyed in the sample sintered at 1243 K although Ca 2.7 Bi 0.3 Co 4 O 9 phase could be recovered at the cooling stage. The size of grains in all samples increases with the increase of sintering temperature, but the relative densities are almost kept unchanged for the samples sintered at the temperature higher than 1183 K. Due to the highly textured structure, the transport properties of the sample sintered at 1223 K are anisotropic and its ZT values in the ab plane are obviously larger than those along the c-axis.

scholarly journals Effect of Calcination Temperature on the Physical Properties of Layered LiNiO2 Prepared by Solid-State Reaction Method

2016 ◽  
Vol 67 ◽  
pp. 31-35 ◽  
Author(s):  
Nandigam Murali ◽  
Jampana Madhuri Sailaja ◽  
Tewodros Aregai ◽  
S.J. Margarette ◽  
V. Veeraiah
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solid State ◽  
Solid State Reaction ◽  
Field Effect ◽  
Sintering Temperature ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Ft Ir ◽  
Scanning Electron

A layered structure compound LiNiO2 material is synthesized by the solid-state reaction method under air atmosphere in the temperature range from 750 °C to 850 °C using Li2CO3 and NiO as the starting materials for 20 hours. The physical properties of the synthesized powder are investigated by X-ray diffraction (XRD), Field effect scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopic (FT-IR) techniques. The results of XRD patterns possessed the α-NaFeO2 structure of the rhombohedral system (space group, ) with no evidence of any impurities. The morphological features of the powders are characterized by field effect scanning electron microscopy (FESEM). The particles of LiNiO2 powder are generally in the form of a smoothly edged polyhedron and their average grain size is approximately 2 - 3 μm. The FT-IR spectroscopic data of LiNiO2 reveal the structure of the oxide lattice constituted by LiO6 and NiO6 octahedra. In general, from this study, we conclude that the LiNiO2 synthesized by solid state reaction method at different temperatures to increase in the sintering temperature. The lattice constant is increased, while the sintering temperature is increased. The maximum and minimum intensity ratios of XRD spectra shows that the optimum calcination condition is 800°C for 20 h. At 750-850°C, the particle size distribution is in the range of 2 - 3 μm.

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