MICROWAVE DIELECTRIC PROPERTIES OF Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 SOLID SOLUTION
This work investigated the influences of Bi content on the phase structure, phase composition, microstructure and microwave properties of tungstenbronze-type like Ba0.75Sr0.25(NdxBi1-x)2Ti4O12 ceramics. XRD patterns showed that the main crystal phase of the ceramics with different Bi content (0.75 ≤...
| Huvudupphovsmän: | , , , , , |
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| Materialtyp: | Artikel |
| Språk: | English |
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University of Chemistry and Technology, Prague
2011-12-01
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| Serie: | Ceramics-Silikáty |
| Ämnen: | |
| Länkar: | http://www.ceramics-silikaty.cz/2011/pdf/2011_04_373.pdf |
| _version_ | 1828465643153784832 |
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| author | Long Mingzhu ZHuang WENDONG Tang Bin Yu Shengquan Zhou Xiaohua Zhang Shuren |
| author_facet | Long Mingzhu ZHuang WENDONG Tang Bin Yu Shengquan Zhou Xiaohua Zhang Shuren |
| author_sort | Long Mingzhu |
| collection | DOAJ |
| description | This work investigated the influences of Bi content on the phase structure, phase composition, microstructure and microwave properties of tungstenbronze-type like Ba0.75Sr0.25(NdxBi1-x)2Ti4O12 ceramics. XRD patterns showed that the main crystal phase of the ceramics with different Bi content (0.75 ≤ x ≤ 0.9) sintered at 1250°C to 1400°C for 3 h was BaNd2Ti4O12 with small amount of second phase Ba2Ti9O20. SEM photographs suggest that Bi could work as sintering aids promoting the densification and grain growth. In the case of the ratio of Nd and Bi (x : (1-x)) is 3:1 namely x is 0.75(B13), this ceramic shows optimum dielectric properties with a high dielectric constant (ε) of 118.5, a quality factor (Q × f) of 4907 (f = 2.8 GHz), and a temperature coefficient of resonant frequency tf = –1.3 ppm/°C. As the addition of Bi increased from 0.1 to 0.25, the value of ε markedly increased, the value of Q × f and tf decreased with a tf value finally approaching to zero. |
| first_indexed | 2024-12-11T03:36:07Z |
| format | Article |
| id | doaj.art-e09bb841ef4b4574b4cd09a32da4d26c |
| institution | Directory Open Access Journal |
| issn | 0862-5468 1804-5847 |
| language | English |
| last_indexed | 2024-12-11T03:36:07Z |
| publishDate | 2011-12-01 |
| publisher | University of Chemistry and Technology, Prague |
| record_format | Article |
| series | Ceramics-Silikáty |
| spelling | doaj.art-e09bb841ef4b4574b4cd09a32da4d26c2022-12-22T01:22:15ZengUniversity of Chemistry and Technology, PragueCeramics-Silikáty0862-54681804-58472011-12-01554373377MICROWAVE DIELECTRIC PROPERTIES OF Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 SOLID SOLUTIONLong MingzhuZHuang WENDONGTang BinYu ShengquanZhou XiaohuaZhang ShurenThis work investigated the influences of Bi content on the phase structure, phase composition, microstructure and microwave properties of tungstenbronze-type like Ba0.75Sr0.25(NdxBi1-x)2Ti4O12 ceramics. XRD patterns showed that the main crystal phase of the ceramics with different Bi content (0.75 ≤ x ≤ 0.9) sintered at 1250°C to 1400°C for 3 h was BaNd2Ti4O12 with small amount of second phase Ba2Ti9O20. SEM photographs suggest that Bi could work as sintering aids promoting the densification and grain growth. In the case of the ratio of Nd and Bi (x : (1-x)) is 3:1 namely x is 0.75(B13), this ceramic shows optimum dielectric properties with a high dielectric constant (ε) of 118.5, a quality factor (Q × f) of 4907 (f = 2.8 GHz), and a temperature coefficient of resonant frequency tf = –1.3 ppm/°C. As the addition of Bi increased from 0.1 to 0.25, the value of ε markedly increased, the value of Q × f and tf decreased with a tf value finally approaching to zero.http://www.ceramics-silikaty.cz/2011/pdf/2011_04_373.pdfBa0.75Sr0.25 (NdxBi1-x)2Ti4O12Tungstenbronze-typeDielectric propertiesMicrowave |
| spellingShingle | Long Mingzhu ZHuang WENDONG Tang Bin Yu Shengquan Zhou Xiaohua Zhang Shuren MICROWAVE DIELECTRIC PROPERTIES OF Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 SOLID SOLUTION Ceramics-Silikáty Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 Tungstenbronze-type Dielectric properties Microwave |
| title | MICROWAVE DIELECTRIC PROPERTIES OF Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 SOLID SOLUTION |
| title_full | MICROWAVE DIELECTRIC PROPERTIES OF Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 SOLID SOLUTION |
| title_fullStr | MICROWAVE DIELECTRIC PROPERTIES OF Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 SOLID SOLUTION |
| title_full_unstemmed | MICROWAVE DIELECTRIC PROPERTIES OF Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 SOLID SOLUTION |
| title_short | MICROWAVE DIELECTRIC PROPERTIES OF Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 SOLID SOLUTION |
| title_sort | microwave dielectric properties of ba0 75sr0 25 ndxbi1 x 2ti4o12 solid solution |
| topic | Ba0.75Sr0.25 (NdxBi1-x)2Ti4O12 Tungstenbronze-type Dielectric properties Microwave |
| url | http://www.ceramics-silikaty.cz/2011/pdf/2011_04_373.pdf |
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