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    How Microwave Impact On Porcelain Dielectric Properties

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    Trabalho apresentado em evento
    Date
    2021
    Author
    Jermolovicius, Luiz Alberto
    Jermolovicius, A.B.
    Pouzada, Eduardo V. S.
    Yoshimura, H.N.
    xmlui.dri2xhtml.METS-1.0.item-sponsorship
    Mário Tulio
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    Abstract
    This work deals with influence of ceramic processes parameters like moisture, compaction pressure and heating source (electric resistance and hybrid microwave) on dielectric properties of a sintered translucent porcelain. Several porcelain samples were prepared with two levels of moisture (3% and 6%) during the pressing process and two levels of hydraulic pressure (100 and 174 MPa) before drying; porcelain composition was kaolin (43%), potassic feldspar (36%), quartz (17%), bentonite (1%) and wollastonite (3%). Dielectric properties of the green porcelain were measured, and the results induced the use of a hybrid microwave furnace. Dried porcelain samples were sintered at 1200 oC with an electric furnace (7000 W) and with a microwave hybrid furnace (1600 W of microwave with silicon carbide as a susceptor). The dielectric properties of the sintered porcelain were measured. The results were statistically analyzed with Yates' method and variance analysis; it was proved that sintering with microwaves has a significative influence on the dielectric constant and loss tangent with 99.9% of confidence. Compaction pressure level impacted loss tangent value with 99% of confidence and moisture level (at pressing) impacted dielectric constant with 90% of confidence. Multivariate regressions for the green porcelain dielectric constant and loss tangent were determined. © AMPERE 2021. All rights reserved.
    1. Dielectric properties
    2. Industrial applications
    3. Microwave sintering
    4. Operational parameters)
    5. Permittivity
    6. Electric furnaces
    7. Microwave heating
    8. Microwaves
    9. Moisture
    10. Moisture determination
    11. Permittivity
    12. Regression analysis
    13. Silicate minerals
    14. Silicon carbide
    15. Sintering
    16. %moisture
    17. Compaction pressure
    18. Dielectrics property
    19. Loss tangent
    20. Microwave sintering
    21. Operational parameter)
    22. Operational parameters
    23. Pressung
    24. Pressure source
    25. Process parameters
    26. Porcelain
    URI
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124521567&partnerID=40&md5=3e53b7482a7fcbd82cea8557045f5b11
    https://repositorio.maua.br/handle/MAUA/730
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