Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Method
Main Author: | |
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Publication Date: | 2013 |
Other Authors: | , |
Format: | Conference object |
Language: | eng |
Source: | Repositório Institucional da UNESP |
Download full: | http://hdl.handle.net/11449/194809 |
Summary: | Dielectric resonators with high dielectric constant, low dielectric losses and high frequency stability have been widely used in microwave circuits for telecommunications as filters, oscillators, antennas. Among the compounds of the BaO-TiO2 system, Ba2Ti9O20 has met these requirements. However, such materials are difficult to obtain by conventional mechanical powder mixture due to the preferential formation of secondary phases and high sintering temperatures around 1300 degrees C. In this investigation a new approach for obtaining B2O3-added Ba2Ti9O20 is considered through a chemical method involving a co-precipitation process aiming to reduce the sintering temperature and to promote a high microstructural homogeneity of the compound. Therefore, cylindrical ceramics were sintered at 1000-1150 degrees C presenting values of electric permittivity from 34.8 to 41.4, quality factor due to dielectric losses from 2945 to 3525, temperature coefficient from 6.2 to 10.2 ppm/degrees C and an overall tunable frequency range of 5.00-7.00 GHz, which yields promising properties for use as dielectric resonators. |
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Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Methoddielectric resonatorsbarium nanotitanatemicrowave propertiesmicrowave ceramicsDielectric resonators with high dielectric constant, low dielectric losses and high frequency stability have been widely used in microwave circuits for telecommunications as filters, oscillators, antennas. Among the compounds of the BaO-TiO2 system, Ba2Ti9O20 has met these requirements. However, such materials are difficult to obtain by conventional mechanical powder mixture due to the preferential formation of secondary phases and high sintering temperatures around 1300 degrees C. In this investigation a new approach for obtaining B2O3-added Ba2Ti9O20 is considered through a chemical method involving a co-precipitation process aiming to reduce the sintering temperature and to promote a high microstructural homogeneity of the compound. Therefore, cylindrical ceramics were sintered at 1000-1150 degrees C presenting values of electric permittivity from 34.8 to 41.4, quality factor due to dielectric losses from 2945 to 3525, temperature coefficient from 6.2 to 10.2 ppm/degrees C and an overall tunable frequency range of 5.00-7.00 GHz, which yields promising properties for use as dielectric resonators.Natl Inst Space Res INPE, BR-12227010 Sao Jose Dos Campos, SP, BrazilUniv Estadual Paulista UNESP, CDMDC, BR-14807455 Araraquara, SP, BrazilUniv Estadual Paulista UNESP, CDMDC, BR-14807455 Araraquara, SP, BrazilIeeeNatl Inst Space Res INPEUniversidade Estadual Paulista (Unesp)Castro, Pedro J.Zanetti, Sonia M. [UNESP]IEEE2020-12-10T16:55:10Z2020-12-10T16:55:10Z2013-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject42013 Sbmo/ieee Mtt-s International Microwave & Optoelectronics Conference (imoc). New York: Ieee, 4 p., 2013.http://hdl.handle.net/11449/194809WOS:000359376200180Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPeng2013 Sbmo/ieee Mtt-s International Microwave & Optoelectronics Conference (imoc)229513info:eu-repo/semantics/openAccess2023-05-25T18:35:53Zoai:repositorio.unesp.br:11449/194809Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-05-25T18:35:53Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Method |
title |
Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Method |
spellingShingle |
Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Method Castro, Pedro J. dielectric resonators barium nanotitanate microwave properties microwave ceramics |
title_short |
Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Method |
title_full |
Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Method |
title_fullStr |
Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Method |
title_full_unstemmed |
Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Method |
title_sort |
Barium Nanotitanate Microwave Ceramics Obtained by a Chemical Method |
author |
Castro, Pedro J. |
author_facet |
Castro, Pedro J. Zanetti, Sonia M. [UNESP] IEEE |
author_role |
author |
author2 |
Zanetti, Sonia M. [UNESP] IEEE |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Natl Inst Space Res INPE Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Castro, Pedro J. Zanetti, Sonia M. [UNESP] IEEE |
dc.subject.por.fl_str_mv |
dielectric resonators barium nanotitanate microwave properties microwave ceramics |
topic |
dielectric resonators barium nanotitanate microwave properties microwave ceramics |
description |
Dielectric resonators with high dielectric constant, low dielectric losses and high frequency stability have been widely used in microwave circuits for telecommunications as filters, oscillators, antennas. Among the compounds of the BaO-TiO2 system, Ba2Ti9O20 has met these requirements. However, such materials are difficult to obtain by conventional mechanical powder mixture due to the preferential formation of secondary phases and high sintering temperatures around 1300 degrees C. In this investigation a new approach for obtaining B2O3-added Ba2Ti9O20 is considered through a chemical method involving a co-precipitation process aiming to reduce the sintering temperature and to promote a high microstructural homogeneity of the compound. Therefore, cylindrical ceramics were sintered at 1000-1150 degrees C presenting values of electric permittivity from 34.8 to 41.4, quality factor due to dielectric losses from 2945 to 3525, temperature coefficient from 6.2 to 10.2 ppm/degrees C and an overall tunable frequency range of 5.00-7.00 GHz, which yields promising properties for use as dielectric resonators. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-01-01 2020-12-10T16:55:10Z 2020-12-10T16:55:10Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
2013 Sbmo/ieee Mtt-s International Microwave & Optoelectronics Conference (imoc). New York: Ieee, 4 p., 2013. http://hdl.handle.net/11449/194809 WOS:000359376200180 |
identifier_str_mv |
2013 Sbmo/ieee Mtt-s International Microwave & Optoelectronics Conference (imoc). New York: Ieee, 4 p., 2013. WOS:000359376200180 |
url |
http://hdl.handle.net/11449/194809 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2013 Sbmo/ieee Mtt-s International Microwave & Optoelectronics Conference (imoc) 229513 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
4 |
dc.publisher.none.fl_str_mv |
Ieee |
publisher.none.fl_str_mv |
Ieee |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1799965582093713408 |