文章信息/Info

Title:

 Study on the Precursors for MOCVD of High T c Superconductors YBCO

作者:

張騰; 古宏偉; 丁發(fā)柱

（中國科學(xué)院電工研究所 應(yīng)用超導(dǎo)重點(diǎn)實(shí)驗(yàn)室，北京 100190）

Author(s):

 ZHANG Teng;  GU Hongwei; DING Fazhu

(Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering,Chinese Academy of Sciences, Beijing 100190, China)

關(guān)鍵詞:

 ; YBCO; MOCVD; 前驅(qū)鹽; 2;  2;  6;  6�菜募谆���3;  5�哺�二酮

文獻(xiàn)標(biāo)志碼:

A

摘要:

     通過金屬有機(jī)源化學(xué)氣相沉積技術(shù)（MOCVD）已可制得�獻(xiàn) c達(dá)280 A/cm，�獻(xiàn) c×L為 300 330 A·m的高性能YBCO帶材，表現(xiàn)出巨大的優(yōu)勢(shì)和誘人的應(yīng)用前景。進(jìn)一步提高前驅(qū)鹽的揮發(fā)性和批次穩(wěn)定性不但能降低YBCO帶材的生產(chǎn)成本、也能提高其性能穩(wěn)定性。本研究報(bào)道了MOCVD法制備YBCO所需��β��二酮中間體TMHD及其釔、鋇、銅金屬有機(jī)前驅(qū)鹽的制備，通過紅外光譜和核磁共振譜對(duì)其化學(xué)結(jié)構(gòu)予以確認(rèn)；同時(shí)以金屬鋇與TMHD在正戊烷或正己烷中制備了無水 β 二酮鋇鹽（Ba［tmhd］��2），隨后用五乙烯六胺為輔助配體（L）制備了揮發(fā)性更好的無水復(fù)合配體鋇鹽（Ba［tmhd］��2·L），并通過熱重分析技術(shù)比較了各前驅(qū)鹽的揮發(fā)性，結(jié)果表明：輔助配體五乙烯六胺對(duì)提高鋇鹽揮發(fā)性作用顯著。��

Abstract:

 By metal organic chemical vapor deposition process (MOCVD), the kilometer lengths of YBa��2Cu��3O�瓁 (YBCO) second�瞘eneration HTS wires with a minimum critical currents of 280A/cm corresponding to a record �獻(xiàn)���璫×length value of 300330 A·mm has been obtained, and MOCVD technique showed great advantage and attractive prospect in YBCO manufacture of high throughput that enables large production capacity.