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Sofol-ийн хийж байгаа зүйл бол хэрэглэгчдэд хэмнэлттэй, тохиромжтой үйлдвэрлэлийн шугамыг тохируулах, брэндийн үнэ цэнийг бий болгох явдал юм.
The namely off-stoichiometric compound of (Y 0.7 Gd 0.2 Dy 0.2 Sm 0.2 Eu 0.2)Ba 2 Cu 3 O 7–δ was selected in this work because such an off-stoichiometric composition ratio can provide better superconductor properties than a 1:2:3 stoichiometric ratio does in the film. 30 As for (Y,Dy)BCO, the composition ratio of Y:Dy:Ba:Cu is …
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The Dy–Ba–Cu–O/Ag bulk sample was synthesized from a mixture of commercially available pre-sintered powders of DyBa 2 Cu 3 O y (Dy123) and Dy 2 BaCuO 5 (Dy211), mixed in the molar ratio of 5:2 and 0.5 wt.% Pt and 15 wt.% Ag 2 O were added. In order to enhance the superconducting properties, 0–0.1 wt.% ZnO was added. The …
Next, we fabricated large bulk Dy–Ba–Cu–O samples with 10 wt.% Ag 2 O addition with the hot-seeding method using Nd123 seed crystal. The c-axis oriented single domain bulks with the diameters of 32 and 48 mm could be fabricated in air.The trapped flux distribution was measured with an automated field measurement system in that a Hall …
Superconducting properties of Dy–Ba–Cu–O bulk superconductors, S Nariki, M Murakami This site uses cookies. By continuing to use this site you agree to our use of cookies.
The superconducting oxide Dy x Ba (1−x) CuO 3 has been successfully prepared by the ceramic technology. The superconducting critical temperature, T C, of the sample of composition x=0.625 is 94K, the transition width δT c =1.5K and T c (π=0)=90.2K. The a.c. magnetic susceptibility measurements show a large diamagnetism at 94K and a …
The addition of Cu 2 + in Fig. 2 results in a significant positive shift in the reduction potential of Dy 3 +, with a reduction peak potential of −0.446 V observed.The presence of black and red solid particles on the surface of the NdFeB magnet indicates that the co-deposition of Dy 3 + and Cu 2 + is responsible for this potential shift. Additionally, …
In the separate zones (lighter colored), the ratio of Ba:Cu was nearly 1:1, which confirmed the appearance of the BaCuO 2 phase, as established by the X-ray phase analysis ( Figure 1) and ...
An experimental study of the Hall effect in nonmetallic Y-Ba-Cu-O thin films is reported. Both epitaxial crystalline YBa2Cu3O6+x (x⩽0.5) and multiphase/amorphous Y-Ba-Cu-O thin films were studied. … Expand
Abstract: A high-speed YBa 2 Cu 3 O 7-δ direct detection system was developed to monitor terahertz picosecond pulses in the time domain. High-T C superconducting thin-film YBa 2 Cu 3 O 7-δ microbridges with critical temperatures of T C = 85 K were embedded into a planar log-spiral antenna to couple the broadband terahertz …
ratio of 2:1:1 of (Dy: Ba: Cu) were dissolved in 40 ml DI water. Then a certain quantity of PEG- 6000 was added to the mixture containing Dy, Ba, and Cu precursors. After 10 min
We measured the levitation force and the stiffness between six Dy–Ba–Cu–O bulk superconductors 47 mm in diameter and 10 mm in thickness and ring Fe–Nd–B magnets 120 mm in outer diameter and 70 mm in inner diameter with the thicknesses of 5–40 mm. Six pellets of Dy–Ba–Cu–O were placed concentrically in a cryostat such that …
BaCeO3-based proton conductors have comparatively high-proton conductivity, but the low chemical stability and high sintering temperature seriously hinder their practical applications in protonic ceramic fuel cells. Herein, we demonstrate that this limitation can be conciliated by using a triple-doping strategy in a …
1. Introduction. Bulk (RE)Ba 2 Cu 3 O 7-δ (RE)BCO superconductors processed in the form of large, single grains can carry large critical currents and are therefore potentially useful for application as trapped field magnets and in motors and generators etc. [1], [2], [3].Top seeded melt growth (TSMG) [4], [5], [6], in general, and …
Y-Ba-Cu-O/Dy-Ba-Cu-O superlattices: A first step towards the artificial construction of high-Tc superconductors. Y-Ba-Cu-O/Dy-Ba-Cu-O superlattices: A first step towards the artificial construction of high-Tc superconductors Phys Rev Lett. 1989 Aug 28;63(9):1016-1019. doi: 10.1103/PhysRevLett.63.1016. ...
Đọc truyện Con Đường Bá Chủ của tác giả Akay Hau. Truyện kể về Lạc Nam và người cha nuôi của anh, một người lính quân đội xuất sắc, đều bị sát hại. Trong một thoáng chốc, chàng trai trẻ xuyên qua không gian và thời gian, bước vào một thế giới hoàn toàn khác biệt, một thế giới tu tiên được gọi là ...
1. Introduction. Melt-processed rare-earth (RE)-Ba–Cu–O high-critical temperature (T c) superconductors have a high-critical current density (J c) at 77 K and high magnetic fields [1], [2], [3].As is well known, a high-critical current density and a large bulk size, which is related to current loop size are the essential requirements for engineering …
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We prepared the c-axis oriented, 16-mm-diameter, Zn-doped Dy-Ba-Cu-O (DyBCO) bulk superconductors by the cold-seeding technique and studied their position dependent superconducting properties. It was found that the superconducting transition temperature (T c ) was almost the same for all positions of the undoped superconductor. The critical …
We report on the superconducting properties of melt-textured Dy123 bulk superconductors containing 5 to 40 mol% Dy211. Dy–Ba–Cu–O bulk samples were fabricated with the …
By establishing a partial phase diagram of the Ba-Y-Cu-O system, we synthesized a single-phased sample with Tc above 90 K. The crystal structure was determined to be an orthorhombic derivative of ...
Download scientific diagram | Thermal cycle for the fabrication of Dy-Ba-Cu-O bulk samples: (a) melt-texturing; (b) oxygenation from publication: The contribution of 211 …
The preparation of Y–Ba–Cu-oxide (YBCO) powder by various techniques is critically reviewed and the synthesis of ultrafine superconducting YBa 2 Cu 3 O x (123) powders is specially emphasized. The fine powder has assumed a large importance, requiring the minimization of processing parameters (time and temperature) during …
mixture containing Dy, Ba, and Cu precursors. After 10 min . stirring, NH 3 25% was added to adjust pH to 8 and trans-ferred to an autoclave. The hydrothermal reaction was done .
Người đàn bà cũ Nhạc sĩ: Em biết [Am] phải làm gì hơn nữa [E] đâu Chấp nhận [E7] rồi nặng bước trong âu [Am] sầu Gói chút buồn và nhiều hơn đớn [E] đau Hành lý [E7] của người đàn bà đã [Am] cũ.
We have studied the relationship between the particle size of Dy 2 BaCuO 5 (Dy211) starting powder in the precursor and the particle size of Dy211 inclusions trapped in the …
We report on the superconducting properties of melt-textured Dy123 bulk superconductors containing 5 to 40 mol% Dy211. Dy?Ba?Cu?O bulk samples were fabricated with the cold-seeding method in air using a Nd123 seed crystal. The superconducting properties of the bulk samples were strongly affected by the Dy211 content and the oxygen-annealing …
Dy-Ba-Cu-O is an ideal material for current leads because it has a low thermal conductivity and a high critical current density of 77 K in high magnetic fields. In this study, current carrying properties of Dy-Ba-Cu-O bulk current leads under the cryocooler-cooled condition have been investigated. The current leads consisted of a Dy-Ba-Cu-O …
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