Direct observations of pseudo-binary NdBa_2Cu_3O_x-Ba_3Cu_10O_13 phase diagram and NbBa_2Cu_3O_x kcrystllization udner reduced oxgyen atmosphere

D.K. Aswal; M. Shinmura; Y. Hayakawa

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Direct observations of pseudo-binary NdBa_2Cu_3O_x-Ba_3Cu_10O_13 phase diagram and NbBa_2Cu_3O_x kcrystllization udner reduced oxgyen atmosphere

机译：直接观察伪二元NdBa_2Cu_3O_x-Ba_3Cu_10O_13相图和NbBa_2Cu_3O_x晶化乌德纳减少了氧气气氛

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摘要

The pseudo-binary NdBa_2Cu_3O_x-Ba_3Cu_10O_13 phase diagrams and the crystallization of NbBa_2Cu_3O_x have been in stud observed using high-temeprautre opticla microscope under three different xogyen atomospheres namely 1/100, 0.1/100 and 0.0097/100 oxygen in argeon. It khas been observed that the liquidus line becomes narroiwer both in compostion and temperautre with decreasing oxygen pressure. This result suggested that under reduced oxygen atmoshepre, the NbBa_2Cu_3O_x crystals could only be gown from a peritectic melt consisting of Nd_4Ba_2Cu_2O_10 and liquid. The crystallizaiotn temeprautre of NbBa_2Cu_3O_x was found to decrease logarithmically with decreasing oxygenj content in the atmosphere.

机译：使用高倍光学显微镜在氩气中三种不同的氧气气氛下（1 / 100、0.1 / 100和0.0097 / 100），使用准光学显微镜观察了伪二进制NdBa_2Cu_3O_x-Ba_3Cu_10O_13的相图和NbBa_2Cu_3O_x的结晶。人们已经观察到，随着氧气压力的降低，液相线在成分和温度上都变得越来越烦人。该结果表明，在降低的氧气气氛下，只能从由Nd_4Ba_2Cu_2O_10和液体组成的包晶熔体中长出NbBa_2Cu_3O_x晶体。发现NbBa_2Cu_3O_x的结晶化对映体随着大气中氧含量的降低而对数减少。

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来源
《Journal of Crystal Growth》 |1999年第4期|p.427-434|共8页
作者
D.K. Aswal; M. Shinmura; Y. Hayakawa;
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作者单位

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类晶体学;
关键词
Phae diagram; Crystallizaiton; High temperautre optical microscopy;

机译：相图;结晶;高温光学显微镜;

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Direct observations of pseudo-binary NdBa_2Cu_3O_x-Ba_3Cu_10O_13 phase diagram and NbBa_2Cu_3O_x kcrystllization udner reduced oxgyen atmosphere

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