| 1. Identity statement | |
| Reference Type | Conference Paper (Conference Proceedings) |
| Site | mtc-m16.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Repository | sid.inpe.br/marciana/2004/01.16.11.44 |
| Last Update | 2004:03.29.03.00.00 (UTC) administrator |
| Metadata Repository | sid.inpe.br/marciana/2004/01.16.11.44.10 |
| Metadata Last Update | 2018:06.05.01.20.48 (UTC) administrator |
| Secondary Key | INPE-10546-PRE/6018 |
| Citation Key | NonoFonsCastKold:2003:MiSoMi |
| Title | Microstructure and some microwave characterization of SrO2-Ba2Ti9O20 dieleetric resonators for telecommunications applications  |
| Format | Papel |
| Project | TECAMB: Tecnologia ambiental |
| Year | 2003 |
| Access Date | 2024, May 14 |
| Secondary Type | PRE CI |
| Number of Files | 1 |
| Size | 332 KiB |
| 2. Context | |
| Author | 1 Nono, Maria do Carmo de Andrade 2 Fonseca, Solange Tâmara 3 Castro, Pedro José de 4 Koldayeva, Yu |
| Resume Identifier | 1 8JMKD3MGP5W/3C9JHRC 2 3 8JMKD3MGP5W/3C9JJ44 |
| Group | 1 LAS-INPE-MCT-BR 2 LAS-INPE-MCT-BR 3 LAP-INPE-MCT-BR 4 LAS-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais (INPE.LAS) 2 Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais (INPE.LAS) 3 Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Plasma (INPE.LAP) 4 Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Sensores e Materiais (INPE.LAS) |
| Conference Name | International Latin-American Conference on Powder Technology, 4 (PTECH 2003). |
| Conference Location | Guarujá, 2003 |
| Date | 2003 |
| Publisher | FAPESP/CNPQ/FINEP/CAPES |
| Publisher City | São Paulo |
| Pages | 160 |
| Book Title | Proceedings |
| History (UTC) | 2006-11-09 18:34:21 :: administrator -> marciana :: 2008-03-14 17:17:23 :: marciana -> administrator :: 2018-06-05 01:20:48 :: administrator -> marciana :: 2003 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | SENSORS AND MATERIALS Dieleetric ressonators Ceramic characterization Microwave characterization SENSORES E MATERIAIS Ressonador dielétrico Ceramica Microondas |
| Abstract | This work deals with the influence of strontium oxide (SrO2) in the dielectric properties of the Ba2Ti9O20 ceramics as microwave oscillators for telecommunications applications. The main requirements of these dielectric resonators are the high selectivity and stability in frequency, the high value of both the dielectric constant (e) and of the quality factor (Q), as well as the low temperature coefficient of resonance frequency (tf). The ceramics were prepared using suitable powder mixtures, without and with SrO2 addition, varying the content from 0.2 to 1.0 mol %. The powders were mixed, compacted by uniaxial and isostatic pressing, producing cylindrical samples with specified dimensions in order to obtain dielectric resonators operating at frequency range around 7.0 GHz. Finally, they were sintered at 1250ºC for 6 hours and 1360ºC for 6 hours. The ceramics characterization was carried out using X-ray diffraction technique (for the formation study of the Ba2Ti9O20 chemical compound), and scanning electron microscopy - SEM (for microstructure densification degree and grain size analyses). The dielectric parameters in microwaves (e, Q and tf) were measured using a suitable microwave system specially mounted to accomplish such measurements. SEM analyses showed a high densification degree and a grain size increase with the amount of SrO2 added to the ceramics. This fact has increased the quality factor due to dielectric losses, although the dielectric constant was kept practically unchanged. |
| Area | FISMAT |
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > LABAS > Microstructure and some... |
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > LABAP > Microstructure and some... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| data URL | http://urlib.net/ibi/sid.inpe.br/marciana/2004/01.16.11.44 |
| zipped data URL | http://urlib.net/zip/sid.inpe.br/marciana/2004/01.16.11.44 |
| Language | en |
| Target File | koldayeva.pdf |
| User Group | administrator marciana administrator |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Read Permission | allow from all |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3ESR3H2 8JMKD3MGPCW/3ET2RFS |
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.55.40 1 sid.inpe.br/mtc-m21/2012/07.13.14.58.14 1 |
| Host Collection | sid.inpe.br/banon/2003/08.15.17.40 |
| 6. Notes | |
| Empty Fields | archivingpolicy archivist callnumber copyright creatorhistory descriptionlevel dissemination documentstage doi e-mailaddress edition editor electronicmailaddress identifier isbn issn label lineage mark mirrorrepository nextedition notes numberofvolumes orcid organization parameterlist parentrepositories previousedition previouslowerunit progress readergroup rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype type url versiontype volume |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |