Structural Characterization for Ceramic Pyrochlores of Bi-Zn-Nb-O
Ceramic pyrochlores, the basis of Bi2O3-ZnO-Nb2O5 (BZN), have dielectric properties of great interest, such a high dielectric constant (ε), a low dielectric loss tangent (tan δ) and a low coefficient of capacitance with temperature (TCC). The system has two main phases, Bi1,5ZnNb1,5O7 (α) and Bi2Zn0...
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| Veröffentlicht in: | Materials science forum 2018, Vol.912, p.16-20 |
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| creator | Farias, Francisco Werley Cipriano Sombra, Antonio Sérgio Bezerra Sales, Juscelino Chaves dos Santos Alves, Yuri Mikael Alves, Antonio Sidnel Gomes Pereira, Francisca Maria Martins Barroso, Maria das Dores Bandeira |
| description | Ceramic pyrochlores, the basis of Bi2O3-ZnO-Nb2O5 (BZN), have dielectric properties of great interest, such a high dielectric constant (ε), a low dielectric loss tangent (tan δ) and a low coefficient of capacitance with temperature (TCC). The system has two main phases, Bi1,5ZnNb1,5O7 (α) and Bi2Zn0,67Nb1,33O7 (β) with cubic and orthorhombic crystal structures, and very different dielectric properties. The purpose of this article was to synthesize chemically homogeneous ceramic pyrochlores BZN-α and BZN-β, using the ceramic method in obtaining nanopowders and their characterizations by scanning electron microscopy (SEM), X-Ray Diffraction (XRD), and the Rietveld refinement method of the structures. The powders were weighed in stoichiometric proportions and calcined at 700 °C/2h, they were sintered at 900, 950 and 1000 °C/2h. A pure BZN-α phase was obtained, while the BZN-β has remained in phases as Bi5Nb3O15 and BiNbO4. |
| doi_str_mv | 10.4028/www.scientific.net/MSF.912.16 |
| format | Article |
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The system has two main phases, Bi1,5ZnNb1,5O7 (α) and Bi2Zn0,67Nb1,33O7 (β) with cubic and orthorhombic crystal structures, and very different dielectric properties. The purpose of this article was to synthesize chemically homogeneous ceramic pyrochlores BZN-α and BZN-β, using the ceramic method in obtaining nanopowders and their characterizations by scanning electron microscopy (SEM), X-Ray Diffraction (XRD), and the Rietveld refinement method of the structures. The powders were weighed in stoichiometric proportions and calcined at 700 °C/2h, they were sintered at 900, 950 and 1000 °C/2h. A pure BZN-α phase was obtained, while the BZN-β has remained in phases as Bi5Nb3O15 and BiNbO4.</description><identifier>ISSN: 0255-5476</identifier><identifier>ISSN: 1662-9752</identifier><identifier>EISSN: 1662-9752</identifier><identifier>DOI: 10.4028/www.scientific.net/MSF.912.16</identifier><language>eng</language><publisher>Pfaffikon: Trans Tech Publications Ltd</publisher><subject>Bismuth oxides ; Bismuth trioxide ; Ceramics ; Crystal structure ; Crystals ; Dielectric loss ; Dielectric properties ; Niobium oxides ; Organic chemistry ; Pyrochlores ; Rietveld method ; Scanning electron microscopy ; Sintering (powder metallurgy) ; Structural analysis ; X-ray diffraction ; Zinc oxide</subject><ispartof>Materials science forum, 2018, Vol.912, p.16-20</ispartof><rights>2018 Trans Tech Publications Ltd</rights><rights>Copyright Trans Tech Publications Ltd. Jan 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2686-2cf7317b2bc0885e4bb21b4ff07b70f7f8aa87151bf4784e11b66d9a7de5f0733</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttps://www.scientific.net/Image/TitleCover/4623?width=600</thumbnail><link.rule.ids>314,776,780,4010,27900,27901,27902</link.rule.ids></links><search><creatorcontrib>Farias, Francisco Werley Cipriano</creatorcontrib><creatorcontrib>Sombra, Antonio Sérgio Bezerra</creatorcontrib><creatorcontrib>Sales, Juscelino Chaves</creatorcontrib><creatorcontrib>dos Santos Alves, Yuri Mikael</creatorcontrib><creatorcontrib>Alves, Antonio Sidnel Gomes</creatorcontrib><creatorcontrib>Pereira, Francisca Maria Martins</creatorcontrib><creatorcontrib>Barroso, Maria das Dores Bandeira</creatorcontrib><title>Structural Characterization for Ceramic Pyrochlores of Bi-Zn-Nb-O</title><title>Materials science forum</title><description>Ceramic pyrochlores, the basis of Bi2O3-ZnO-Nb2O5 (BZN), have dielectric properties of great interest, such a high dielectric constant (ε), a low dielectric loss tangent (tan δ) and a low coefficient of capacitance with temperature (TCC). The system has two main phases, Bi1,5ZnNb1,5O7 (α) and Bi2Zn0,67Nb1,33O7 (β) with cubic and orthorhombic crystal structures, and very different dielectric properties. The purpose of this article was to synthesize chemically homogeneous ceramic pyrochlores BZN-α and BZN-β, using the ceramic method in obtaining nanopowders and their characterizations by scanning electron microscopy (SEM), X-Ray Diffraction (XRD), and the Rietveld refinement method of the structures. The powders were weighed in stoichiometric proportions and calcined at 700 °C/2h, they were sintered at 900, 950 and 1000 °C/2h. A pure BZN-α phase was obtained, while the BZN-β has remained in phases as Bi5Nb3O15 and BiNbO4.</description><subject>Bismuth oxides</subject><subject>Bismuth trioxide</subject><subject>Ceramics</subject><subject>Crystal structure</subject><subject>Crystals</subject><subject>Dielectric loss</subject><subject>Dielectric properties</subject><subject>Niobium oxides</subject><subject>Organic chemistry</subject><subject>Pyrochlores</subject><subject>Rietveld method</subject><subject>Scanning electron microscopy</subject><subject>Sintering (powder metallurgy)</subject><subject>Structural analysis</subject><subject>X-ray diffraction</subject><subject>Zinc oxide</subject><issn>0255-5476</issn><issn>1662-9752</issn><issn>1662-9752</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqNkEFLwzAAhYMoOKf_oSAe0yVpm6QHkVmcCtMJ04uXkGQJy9iamaSM-evtmODV07t87z34ALjBKC8R4aPdbpdH7UybnHU6b00avcwneY1JjukJGGBKCaxZRU7BAJGqglXJ6Dm4iHGFUIE5pgMwnqfQ6dQFuc6apQxSJxPct0zOt5n1IWtMkBuns7d98Hq59sHEzNvs3sHPFr4qOLsEZ1auo7n6zSH4mDy8N09wOnt8bsZTqAnlFBJtWYGZIkojzitTKkWwKq1FTDFkmeVScoYrrGzJeGkwVpQuaskWpuqZohiC6-PuNvivzsQkVr4LbX8pCK5rUhSkpD11e6R08DEGY8U2uI0Me4GROFgTvTXxZ0301kRvTfTWBD707479FGQbk9HLv5v_LfwAYyB9mg</recordid><startdate>2018</startdate><enddate>2018</enddate><creator>Farias, Francisco Werley Cipriano</creator><creator>Sombra, Antonio Sérgio Bezerra</creator><creator>Sales, Juscelino Chaves</creator><creator>dos Santos Alves, Yuri Mikael</creator><creator>Alves, Antonio Sidnel Gomes</creator><creator>Pereira, Francisca Maria Martins</creator><creator>Barroso, Maria das Dores Bandeira</creator><general>Trans Tech Publications Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7SR</scope><scope>7XB</scope><scope>88I</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>M2P</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope></search><sort><creationdate>2018</creationdate><title>Structural Characterization for Ceramic Pyrochlores of Bi-Zn-Nb-O</title><author>Farias, Francisco Werley Cipriano ; Sombra, Antonio Sérgio Bezerra ; Sales, Juscelino Chaves ; dos Santos Alves, Yuri Mikael ; Alves, Antonio Sidnel Gomes ; Pereira, Francisca Maria Martins ; Barroso, Maria das Dores Bandeira</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2686-2cf7317b2bc0885e4bb21b4ff07b70f7f8aa87151bf4784e11b66d9a7de5f0733</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Bismuth oxides</topic><topic>Bismuth trioxide</topic><topic>Ceramics</topic><topic>Crystal structure</topic><topic>Crystals</topic><topic>Dielectric loss</topic><topic>Dielectric properties</topic><topic>Niobium oxides</topic><topic>Organic chemistry</topic><topic>Pyrochlores</topic><topic>Rietveld method</topic><topic>Scanning electron microscopy</topic><topic>Sintering (powder metallurgy)</topic><topic>Structural analysis</topic><topic>X-ray diffraction</topic><topic>Zinc oxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Farias, Francisco Werley Cipriano</creatorcontrib><creatorcontrib>Sombra, Antonio Sérgio Bezerra</creatorcontrib><creatorcontrib>Sales, Juscelino Chaves</creatorcontrib><creatorcontrib>dos Santos Alves, Yuri Mikael</creatorcontrib><creatorcontrib>Alves, Antonio Sidnel Gomes</creatorcontrib><creatorcontrib>Pereira, Francisca Maria Martins</creatorcontrib><creatorcontrib>Barroso, Maria das Dores Bandeira</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Engineered Materials Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Science Database</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ProQuest Central Basic</collection><jtitle>Materials science forum</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Farias, Francisco Werley Cipriano</au><au>Sombra, Antonio Sérgio Bezerra</au><au>Sales, Juscelino Chaves</au><au>dos Santos Alves, Yuri Mikael</au><au>Alves, Antonio Sidnel Gomes</au><au>Pereira, Francisca Maria Martins</au><au>Barroso, Maria das Dores Bandeira</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Structural Characterization for Ceramic Pyrochlores of Bi-Zn-Nb-O</atitle><jtitle>Materials science forum</jtitle><date>2018</date><risdate>2018</risdate><volume>912</volume><spage>16</spage><epage>20</epage><pages>16-20</pages><issn>0255-5476</issn><issn>1662-9752</issn><eissn>1662-9752</eissn><abstract>Ceramic pyrochlores, the basis of Bi2O3-ZnO-Nb2O5 (BZN), have dielectric properties of great interest, such a high dielectric constant (ε), a low dielectric loss tangent (tan δ) and a low coefficient of capacitance with temperature (TCC). The system has two main phases, Bi1,5ZnNb1,5O7 (α) and Bi2Zn0,67Nb1,33O7 (β) with cubic and orthorhombic crystal structures, and very different dielectric properties. The purpose of this article was to synthesize chemically homogeneous ceramic pyrochlores BZN-α and BZN-β, using the ceramic method in obtaining nanopowders and their characterizations by scanning electron microscopy (SEM), X-Ray Diffraction (XRD), and the Rietveld refinement method of the structures. The powders were weighed in stoichiometric proportions and calcined at 700 °C/2h, they were sintered at 900, 950 and 1000 °C/2h. A pure BZN-α phase was obtained, while the BZN-β has remained in phases as Bi5Nb3O15 and BiNbO4.</abstract><cop>Pfaffikon</cop><pub>Trans Tech Publications Ltd</pub><doi>10.4028/www.scientific.net/MSF.912.16</doi><tpages>5</tpages></addata></record> |
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| subjects | Bismuth oxides Bismuth trioxide Ceramics Crystal structure Crystals Dielectric loss Dielectric properties Niobium oxides Organic chemistry Pyrochlores Rietveld method Scanning electron microscopy Sintering (powder metallurgy) Structural analysis X-ray diffraction Zinc oxide |
| title | Structural Characterization for Ceramic Pyrochlores of Bi-Zn-Nb-O |
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