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Low -temperature sintering of Al2O3 ceramics doped with 4CuO-Ti O-2-2Nb(2)O(5) composite oxide sintering aid
Yang, Y; Ma, MS; Zhang, FQ; Liu, F; Chen, GY; Liu, ZF; Li, YX
2020-12-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Issue15Pages:5504
SubtypeArticle
AbstractDense alumina ceramics doped with 5 wt% 4CuO-TiO2-2Nb(2)O(5) composite sintering aids were obtained at low sintering temperatures of 950 similar to 975 degrees C. The ceramic sintered at optimal condition shows good microwave dielectric properties (epsilon(r) = 12.7, Q x f = 7400 GHz), high thermal conductivity (18.4 W/m K) and high bending strength (320 MPa). TEM and EDS analysis revealed that amorphous Cu-Ti-Nb-O interfacial films with nanometer thickness formed at the grain boundaries, which could provide paths of mass transportation for densification. Al3+ ions may be involved in mass transportation through substitution by Ti3+ and Ti4+ ions near the grain boundary during the sintering process. The accumulation of copper ions at the trigeminal grain boundary was observed. The migration and reaction of copper ions in grain boundaries may also play an important role in promoting mass transportation and low-temperature densification of alumina ceramics.
DOI10.1016/j.jeurceramsoc.2020.06.068
WOS KeywordDENSIFICATION BEHAVIOR ; DIELECTRIC-PROPERTIES ; ALUMINA ; NICKEL ; FILMS ; TIO2
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27601
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Yang, Y,Ma, MS,Zhang, FQ,et al. Low -temperature sintering of Al2O3 ceramics doped with 4CuO-Ti O-2-2Nb(2)O(5) composite oxide sintering aid[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2020(15):5504.
APA Yang, Y.,Ma, MS.,Zhang, FQ.,Liu, F.,Chen, GY.,...&Li, YX.(2020).Low -temperature sintering of Al2O3 ceramics doped with 4CuO-Ti O-2-2Nb(2)O(5) composite oxide sintering aid.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY(15),5504.
MLA Yang, Y,et al."Low -temperature sintering of Al2O3 ceramics doped with 4CuO-Ti O-2-2Nb(2)O(5) composite oxide sintering aid".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY .15(2020):5504.
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