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Superconductors: Materials, Properties and Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (25 November 2021) | Viewed by 2560

Special Issue Editor


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Guest Editor
Department of Inorganic Chemistry, University of Chemistry and Technology, Prague, Prague, Czech Republic
Interests: superconductors; nanomaterials; inorganic chemistry; rare earths

Special Issue Information

Dear Colleagues,

Since the discovery of the phenomenon of superconductivity, superconductors have increasingly attracted the attention of researchers. Superconductors are materials with virtually zero electric resistivity. Superconducting materials themselves are subdivided into a few categories and material groups (e.g., high-temperature superconductors (HTS) and low-temperature superconductors (LTS)). These materials provide a very large group of possible applications. Among the applications currently utilizing superconducting materials are stable LTS magnets producing large-volume, stable, and high-intensity magnetic fields required for MRI and NMR, HTS thin-layer tapes used in transformers, special magnets, power storage, motors and generators or HTS bulks used in levitation applications. The potential of mainly HTS materials is huge but depends on further improvement of these materials, especially in affordable fabrication, technological reliability or increased performance. This creates a significant challenge for material scientists and engineers specialized in this and related fields, including processing of thin layer substrates or cryogenic technology.

In this Special Issue, recent advances in the field of superconducting materials, including preparation and material processing, applications, and material properties, will be highlighted and discussed.

It is my pleasure to invite you to submit a manuscript to this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Vilém Bartůněk
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Superconductors
  • Superconducting materials
  • Ceramics
  • High-temperature superconductors
  • Low-temperature superconductors
  • Thin layers
  • Tapes
  • Levitation
  • Magnets
  • Superconducting applications
  • Pinning centers
  • Cryogenic technology

Published Papers (1 paper)

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Research

11 pages, 4619 KiB  
Article
Development and Vertical Tests of CEPC 650-MHz Single-Cell Cavities with High Gradient
by Song Jin, Peng Sha, Weimin Pan, Jiyuan Zhai, Zhenghui Mi, Feisi He, Chao Dong, Lingxi Ye and Xiangcong He
Materials 2021, 14(24), 7654; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14247654 - 12 Dec 2021
Cited by 5 | Viewed by 1856
Abstract
A circular electron positron collider (CEPC) will adopt hundreds of 650-MHz superconducting cavities with high quality factor (Q) and accelerating gradient (Eacc). Two 650-MHz single-cell cavities made of fine-grain niobium were first treated via buffered chemical polishing (BCP), [...] Read more.
A circular electron positron collider (CEPC) will adopt hundreds of 650-MHz superconducting cavities with high quality factor (Q) and accelerating gradient (Eacc). Two 650-MHz single-cell cavities made of fine-grain niobium were first treated via buffered chemical polishing (BCP), which was easy and convenient. However, the vertical test results could not meet the specification of the CEPC (4 × 1010 at 22 MV/m). Therefore, electro-polishing (EP) of 650-MHz single-cell cavities was conducted, which was complicated but remarkably effective. Both 650-MHz single-cell cavities achieved state-of-the-art gradients of 35 MV/m after the EP process, which is extremely high for large elliptical cavities (frequency < 1 GHz). One cavity achieved an intrinsic quality factor (Q0) of 4.5 × 1010 at 22.0 MV/m, which was higher than the CEPC spec. The other cavity obtained a lower Q0 of 3.4 × 1010 at 22.0 MV/m, which may have resulted from the cancellation of high-temperature annealing. Full article
(This article belongs to the Special Issue Superconductors: Materials, Properties and Applications)
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