Article(id=1324026911629902093, tenantId=1146029695717560320, journalId=1255847867265597444, issueId=1324026845640925520, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1274630400000, receivedDateStr=2010-05-24, revisedDate=1283616000000, revisedDateStr=2010-09-05, acceptedDate=null, acceptedDateStr=null, onlineDate=1793602214963, onlineDateStr=2026-11-02, pubDate=1297699200000, pubDateStr=2011-02-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793602214963, onlineIssueDateStr=2026-11-02, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793602214963, creator=13701087609, updateTime=1793602214963, updator=13701087609, issue=Issue{id=1324026845640925520, tenantId=1146029695717560320, journalId=1255847867265597444, year='2011', volume='25', issue='1', pageStart='1', pageEnd='96', issueExtLink='null', onlineDate='null', pubDate='1297699200000', pubDateStr='2011-02-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793602199230, creator='13701087609', updateTime=1793602773079, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1324029252970086623, tenantId=1146029695717560320, journalId=1255847867265597444, issueId=1324026845640925520, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1324029252970086624, tenantId=1146029695717560320, journalId=1255847867265597444, issueId=1324026845640925520, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=55, endPage=60, ext={EN=ArticleExt(id=1324026911948669199, articleId=1324026911629902093, tenantId=1146029695717560320, journalId=1255847867265597444, language=EN, title=Fabrication of Nanocrystalline BaTiO₃ Ceramics by Ultra-High Pressure Sintering, columnId=null, journalTitle=Chinese Journal of High Pressure Physics, columnName=null, runingTitle=null, highlight=null, articleAbstract=

10 nm raw BaTiO₃ powder was sintered by ultra-high pressure assisted method at 6 GPa. The grain size of sintering samples is about 30 nm. The microstructures of sintering samples were studied by scanning electron microscope and atomic force microscopy. The results indicated that owing to the ultra-high pressure, the agglomerates in nano powders were broken down, and the densification was significantly increased. Additionally, the nucleation rate was increased due to reducing the energy barrier for nucleation and the growth rate was reduced due to the decrease of diffusivity. Thus, ultra-high pressure enables the specimen to be fabricated under relatively lower temperature and shorter period that assures to obtain dense nanocrystalline ceramics. The piezoelectricity was investigated by piezoelectric force microscopy. There existed some full piezoresponse hysteresis loops at different areas in 30 nm BaTiO₃ ceramics, indicating the presence of piezoelectricity. In addition, oxygen vacancies were produced in strongly reducing atmosphere during ultra-high pressure sintering. F⁺ centers were formed because oxygen vacancies caught electrons, and therefore, the color of BaTiO₃ ceramics became block.

, authors=Chang-Jiang XIAO^{1, 2}, Chang-Qing JIN², Zheng-Xin LI¹, Xiang-Rong DENG¹, authorsList=Chang-Jiang XIAO, Chang-Qing JIN, Zheng-Xin LI, Xiang-Rong DENG, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1324026912149995792, articleId=1324026911629902093, tenantId=1146029695717560320, journalId=1255847867265597444, language=CN, title=纳米BaTiO₃陶瓷的超高压烧结, columnId=0, journalTitle=高压物理学报, columnName=, runingTitle=null, highlight=null, articleAbstract=

将10 nm钛酸钡粉在6 GPa超高压条件下进行烧结，得到了晶粒大小约为30 nm的钛酸钡陶瓷。用扫描电子显微镜和原子力显微镜观测了样品的微观结构。研究表明，由于超高压能够压碎纳米粉体中的团聚体，而且能增加烧结的驱动力，降低成核的势垒，从而使成核速率增加；同时由于扩散能力的降低而使生长速率减小，所以超高压烧结能在较低的温度和较短的时间内得到致密的纳米陶瓷。用压电力显微镜对样品的压电性能进行了检测。在30 nm钛酸钡陶瓷的不同区域内，都存在完整的压电响应回线，说明在30 nm钛酸钡陶瓷中存在压电性。此外，由于超高压的还原性气氛，使钛酸钡陶瓷在烧结过程中产生了氧空位，氧空位俘获电子而形成F⁺色心，使钛酸钡陶瓷颜色变黑。

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肖长江（1969—），男，博士，副教授，主要从事高压下材料的合成；纳米材料、功能材料的制备和性能研究. E-mail：cjxiao@haut.edu.cn

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肖长江（1969—），男，博士，副教授，主要从事高压下材料的合成；纳米材料、功能材料的制备和性能研究. E-mail：cjxiao@haut.edu.cn

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