ICS

29.050；77.040.01

CCS

H62；H21

中華人民共和國(guó)國(guó)家標(biāo)準(zhǔn)

GB/T44371—2024

臨界彎曲直徑測(cè)量

液氮溫區(qū)Bi-2223超導(dǎo)帶材的

臨界彎曲直徑測(cè)量

Criticalbendingdiametermeasurement—

CriticalbendingdiametermeasurementofBi-2223

superconductingwiresinliquidnitrogentemperature

2024-08-23發(fā)布2025-03-01實(shí)施

國(guó)家市場(chǎng)監(jiān)督管理總局發(fā)布

國(guó)家標(biāo)準(zhǔn)化管理委員會(huì)

GB/T44371—2024

目次

前言

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Ⅲ

引言

·····································································································

Ⅳ

1

范圍

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1

2

規(guī)范性引用文件

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1

3

術(shù)語(yǔ)和定義

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1

4

原理

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2

5

測(cè)量裝置

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2

5.1

概述

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2

5.2

測(cè)量組件

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2

5.3

U?I特性測(cè)量系統(tǒng)

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3

6

樣品準(zhǔn)備和安裝

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3

6.1

樣品尺寸要求

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3

6.2

樣品的安裝

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4

7

測(cè)量步驟

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4

7.1

初始臨界電流測(cè)量

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4

7.2

彎曲狀態(tài)下臨界電流測(cè)量

········································································

4

7.3

臨界彎曲直徑測(cè)定

···············································································

5

7.4

多次冷熱循環(huán)的影響（可選）

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5

8

結(jié)果計(jì)算

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5

8.1

臨界電流計(jì)算

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5

8.2

n?值計(jì)算（可選）

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6

8.3

臨界彎曲直徑計(jì)算

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6

8.4

測(cè)量不確定度

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6

9

測(cè)量報(bào)告

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7

9.1

被測(cè)樣品詳情

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7

9.2

測(cè)量條件

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7

9.4

多次冷熱循環(huán)對(duì)Ic的影響（可選）

······························································

7

9.5

其他信息

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7

附錄A（資料性）一種臨界彎曲直徑測(cè)量組件及其使用示例

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8

附錄B（資料性）不確定度評(píng)定

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13

參考文獻(xiàn)

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17

Ⅰ

GB/T44371—2024

前言

本文件按照GB/T1.1—2020《標(biāo)準(zhǔn)化工作導(dǎo)則第1部分：標(biāo)準(zhǔn)化文件的結(jié)構(gòu)和起草規(guī)則》的規(guī)

定起草。

請(qǐng)注意本文件的某些內(nèi)容可能涉及專(zhuān)利。本文件的發(fā)布機(jī)構(gòu)不承擔(dān)識(shí)別專(zhuān)利的責(zé)任。

本文件由中國(guó)科學(xué)院提出。

本文件由全國(guó)超導(dǎo)標(biāo)準(zhǔn)化技術(shù)委員會(huì)（SAC/TC265）歸口。

本文件起草單位：中國(guó)科學(xué)院電工研究所、中國(guó)科學(xué)院物理研究所、中國(guó)科學(xué)院合肥物質(zhì)科學(xué)研究

院、清華大學(xué)、華中科技大學(xué)、華北電力大學(xué)、蘇州新材料研究所有限公司、廣東電網(wǎng)有限責(zé)任公司、

上海電纜研究所有限公司、中國(guó)電力科學(xué)研究院有限公司。

本文件主要起草人：張國(guó)民、張東、杜曉紀(jì)、靖立偉、史越、楊立紅、顧晨、鄭金星、石晶、

皮偉、王玉山、宋萌、宗曦華、丘明、吳奕龍、賈士奇。

Ⅲ

GB/T44371—2024

引言

高溫超導(dǎo)體在超導(dǎo)電力、超導(dǎo)磁體、超導(dǎo)磁懸浮等多個(gè)領(lǐng)域具有廣闊的應(yīng)用前景。目前，實(shí)用高溫

超導(dǎo)材料主要為Bi系和Y系。其中，Bi?2223帶材具備良好超導(dǎo)性能且能制備成長(zhǎng)帶，是第一代實(shí)用高

溫超導(dǎo)帶材。在高場(chǎng)磁體、超導(dǎo)電纜、超導(dǎo)變壓器等應(yīng)用裝置中，超導(dǎo)帶材均需要繞制成線(xiàn)圈或者螺旋

通電導(dǎo)體形式，不可避免地發(fā)生彎曲。高溫超導(dǎo)體為陶瓷氧化物材料，機(jī)械性能較差，彎曲會(huì)導(dǎo)致超導(dǎo)

帶材臨界電流下降。超導(dǎo)帶材存在臨界彎曲直徑，當(dāng)彎曲直徑小于臨界彎曲直徑時(shí)，其臨界電流大幅下

降（如下降到初始值的95%或更低）。所以，在超導(dǎo)裝置設(shè)計(jì)中需要確定臨界彎曲直徑的大小。

目前，雖然對(duì)高溫超導(dǎo)體的臨界電流建立了一些測(cè)量標(biāo)準(zhǔn)，如GB/T18502—2018和

GB/T42472—2023,但對(duì)于高溫超導(dǎo)帶材的臨界彎曲直徑的測(cè)量尚無(wú)標(biāo)準(zhǔn)。

本文件基于現(xiàn)有臨界電流測(cè)量標(biāo)準(zhǔn)，描述液氮溫區(qū)Bi?2223帶材的臨界彎曲直徑的測(cè)量方法，為超

導(dǎo)應(yīng)用工程技術(shù)人員提供指導(dǎo)。

Ⅳ

GB/T44371—2024

臨界彎曲直徑測(cè)量

液氮溫區(qū)Bi-2223超導(dǎo)帶材的

臨界彎曲直徑測(cè)量

1范圍

本文件描述了在液氮溫區(qū)Bi?2223超導(dǎo)帶材臨界彎曲直徑的測(cè)量方法。

本文件適用于矩形截面、銀/銀合金包套且?guī)Р呐R界電流小于300A(77K,自場(chǎng),1μV/cm)的Bi?

2223超導(dǎo)帶材樣品。

2規(guī)范性引用文件

下列文件中的內(nèi)容通過(guò)文中的規(guī)范性引用而構(gòu)成本文件必不可少的條款。其中，注日期的引用文

件，僅該日期對(duì)應(yīng)的版本適用于本文件；不注日期的引用文件，其最新版本（包括所有的修改單）適用

于本文件。

GB/T2900.100—2017電工術(shù)語(yǔ)

超導(dǎo)電性

GB/T18502—2018臨界電流測(cè)量

銀和/或銀合金包套Bi?2212和Bi?2223氧化物超導(dǎo)體的直流臨

界電流

GB/T42472—2023臨界電流測(cè)量

銀包套Bi?2