scholarly journals Influence of Artificially Macroscopical Drilling on the Crystal Growth Orientation of Single Domain SmBCO Bulk Superconductor

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 150
Author(s):  
Miao Wang ◽  
Yuguang Liu ◽  
Xiaomei Wang ◽  
Hang Xian ◽  
Wan-min Yang
Keyword(s):  
High Temperature ◽  
Solid Phase ◽  
Single Domain ◽  
Superconducting Properties ◽  
Bulk Superconductor ◽  
Growth Orientation ◽  
Bulk Superconductors ◽  
Boundary Orientation ◽  
Tangent Direction ◽  
Orientation Growth

A large drilled single domain SmBa2Cu3O7−δ (SmBCO) bulk superconductor with a diameter of 32 mm and different hole sizes was successfully fabricated using the modified top-seeded infiltration and growth (TSIG) process. The morphology, superconducting properties, and grain boundary orientation growth of the drilled SmBCO samples were investigated. It was found that not only are the properties of the drilled sample equivalent to those of normal SmBCO bulk superconductors, but also the NdBCO seed crystal can be well controlled because of the increase in the specific surface area in the solid phase pellet. In addition, the growth orientation along the tangent direction of the holes was first noticed in the drilled single domain SmBCO bulk superconductor. This conclusion is highly important for the accurate control of the growth temperature of high temperature bulk superconductors.

scholarly journals Effects of Gd211 Particles Characteristic in the Precursor Pellets on the Levitation Force of Single-Domain GdBCO Bulks Prepared by the Gd + 011 TSIG Method

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Xiaochun Yuan ◽  
Wanmin Yang
Keyword(s):  
Sintering Temperature ◽  
Levitation Force ◽  
Solid Phase ◽  
Single Domain ◽  
Particle Sizes ◽  
The Novel ◽  
Bulk Superconductors ◽  
Lower Porosity ◽  
Different Temperatures ◽  
Average Size

In this paper, single-domain GdBCO bulks have been fabricated by a new Gd + 011 TSIG method with precursor solid phase pellets (PSPPs) of different Gd211 particle sizes and distributions, prepared by solid state reaction with well-mixed (Gd2O3 + BaCuO2) pellets at different temperatures. The novel results indicated that (1) the average size of Gd211 particles in PSPP is monotonically increasing with increasing the sintering temperature up to 1200°C. (2) With increasing the sintering temperature from 950 to 1200°C, the porous ratio and the density of the PSPP are, respectively, monotonically decreasing and increasing. Furthermore when the sintering temperature is less than 1000°C, the porous ratio is higher and the density is lower than the values of the pressed pellets. (3) With increasing the sintering temperature, the average size of Gd211 particles in the GdBCO bulk first decreases and then increases. In addition, the smallest Gd211 particles are obtained in the sample sintered at 1050°C. (4) The maximum levitation force is obtained in the sample sintered at 1150°C with a relatively larger size of Gd211 particles and lower porosity. This result is significant when fabricating high-quality GdBCO bulk superconductors by controlling the porosity, Gd211 particle size, and their distribution characteristic.

Influence of ZnO doping on the properties of single domain YBCO bulks fabricated by RE+011 TSIG process

2017 ◽  
Vol 31 (25) ◽  
pp. 1745018
Author(s):  
W. M. Yang ◽  
X. C. Yuan ◽  
Y. X. Guo
Keyword(s):  
Lattice Distortion ◽  
Levitation Force ◽  
Solid Phase ◽  
Single Domain ◽  
Pinning Force ◽  
Ybco Bulk ◽  
Trapped Field ◽  
Bulk Superconductors ◽  
Flux Pinning Force ◽  
Zno Doping

Single domain YBCO bulk superconductors with different additions of ZnO have been successfully fabricated by RE[Formula: see text]011 TSIG process with a new solid phase of [(100-[Formula: see text])(Y2O[Formula: see text]BaCuO2)+[Formula: see text]ZnO] and a new liquid phase of (Y2O3+6CuO+10BaCuO2). The effects of ZnO additions on the growth morphology, microstructure, critical temperature ([Formula: see text]), the levitation force and trapped field of the YBCO bulks have been investigated. It is found that within the range of ZnO additions [Formula: see text]=0–1.0 wt.%, all the samples are of the typical characteristic of single-domain YBCO bulk; the [Formula: see text] of the samples decreases from 92 K to 80 K when the ZnO addition [Formula: see text] increases from [Formula: see text]=0 wt.% to [Formula: see text]=1.0 wt.%; the levitation force and trapped field of the samples firstly increase and then decrease with increase of ZnO additions after going through a maximum, which is closely related with the ZnO addition and the resulting flux pinning force caused by lattice distortion due to the substitution of Zn[Formula: see text] for Cu[Formula: see text] site in the YBCO crystal; the largest levitation force 36.8 N (77 K, 0.5 T) and trapped field 0.416 T (77 K, 0.5 T) of the samples are obtained when [Formula: see text]=0.1 wt.%, respectively. This result is significantly important and helpful for us to improve the properties of YBCO bulk superconductors.

Magnetic and superconducting properties of single crystals of Sr2HoRu1−xCuxO6 grown from high temperature solutions

2006 ◽  
Vol 89 (23) ◽  
pp. 232509 ◽  
Author(s):  
S. M. Rao ◽  
K. J. Wang ◽  
N. Y. Yen ◽  
Y. Y. Chen ◽  
C. B. Tsai ◽  
...  
Keyword(s):  
High Temperature ◽  
Single Crystals ◽  
Superconducting Properties
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