Correlation between vibrational modes of A-site ions and microwave dielectric properties in (1-x) CaTiO^sub 3^-x (L^sub i0.5^Sm^sub 0.5^)TiO^sub 3^ ceramics
(1-x)CaTiO3-x(Li0.5Sm0.5)TiO3 (0.7 ≤ x ≤ 0.8, CLST) ceramics with an orthorhombic perovskite structure were fabricated by a conventional solid-state reaction method. The effects of composition variation on the microwave dielectric properties were studied in detail. The permittivity (εr) and quality...
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| Veröffentlicht in: | Journal of alloys and compounds 2017-12, Vol.729, p.742 |
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| creator | Ning, Fanfan Gan, Lin Yuan, Shifeng Qi, Zeming Jiang, Juan Zhang, Tianjin |
| description | (1-x)CaTiO3-x(Li0.5Sm0.5)TiO3 (0.7 ≤ x ≤ 0.8, CLST) ceramics with an orthorhombic perovskite structure were fabricated by a conventional solid-state reaction method. The effects of composition variation on the microwave dielectric properties were studied in detail. The permittivity (εr) and quality factor (Q x f) value decreased with an increase in the x value, and the temperature coefficient of the resonant frequency (Tf) reached nearly zero. Raman and infrared reflection spectroscopy were employed to reveal the relationship between vibrational modes and microwave dielectric properties. The Raman spectra fitted with the Lorentzian model indicated that the dielectric loss deteriorates with an increase in the x value are the result of the lowered A-site cation ordering degree. The harmonic oscillator model was used to fit the infrared reflection spectra, and the obtained complex dielectric response was extrapolated down to the microwave region. The infrared reflection spectra show that the vibrational modes related to A-site cations at lower frequencies (i.e., |
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The effects of composition variation on the microwave dielectric properties were studied in detail. The permittivity (εr) and quality factor (Q x f) value decreased with an increase in the x value, and the temperature coefficient of the resonant frequency (Tf) reached nearly zero. Raman and infrared reflection spectroscopy were employed to reveal the relationship between vibrational modes and microwave dielectric properties. The Raman spectra fitted with the Lorentzian model indicated that the dielectric loss deteriorates with an increase in the x value are the result of the lowered A-site cation ordering degree. The harmonic oscillator model was used to fit the infrared reflection spectra, and the obtained complex dielectric response was extrapolated down to the microwave region. The infrared reflection spectra show that the vibrational modes related to A-site cations at lower frequencies (i.e., <150 cm-1) play the most important role in the microwave dielectric properties of CLST ceramics. The optimal microwave dielectric properties were found to be εr = 109.4, Q x f = 4698 GHz, and Tf = 1.6 ppm/°C in the sample of 0.22CaTiO3-0.78(Li0.5Sm0.5)TiO3.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><language>eng</language><publisher>Lausanne: Elsevier BV</publisher><subject>Cations ; Ceramics ; Composition effects ; Dielectric loss ; Dielectric properties ; Infrared reflection ; Infrared spectra ; Perovskite ; Perovskite structure ; Q factors ; Raman spectra ; Samarium ; Spectrum analysis ; Studies</subject><ispartof>Journal of alloys and compounds, 2017-12, Vol.729, p.742</ispartof><rights>Copyright Elsevier BV Dec 30, 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784</link.rule.ids></links><search><creatorcontrib>Ning, Fanfan</creatorcontrib><creatorcontrib>Gan, Lin</creatorcontrib><creatorcontrib>Yuan, Shifeng</creatorcontrib><creatorcontrib>Qi, Zeming</creatorcontrib><creatorcontrib>Jiang, Juan</creatorcontrib><creatorcontrib>Zhang, Tianjin</creatorcontrib><title>Correlation between vibrational modes of A-site ions and microwave dielectric properties in (1-x) CaTiO^sub 3^-x (L^sub i0.5^Sm^sub 0.5^)TiO^sub 3^ ceramics</title><title>Journal of alloys and compounds</title><description>(1-x)CaTiO3-x(Li0.5Sm0.5)TiO3 (0.7 ≤ x ≤ 0.8, CLST) ceramics with an orthorhombic perovskite structure were fabricated by a conventional solid-state reaction method. The effects of composition variation on the microwave dielectric properties were studied in detail. The permittivity (εr) and quality factor (Q x f) value decreased with an increase in the x value, and the temperature coefficient of the resonant frequency (Tf) reached nearly zero. Raman and infrared reflection spectroscopy were employed to reveal the relationship between vibrational modes and microwave dielectric properties. The Raman spectra fitted with the Lorentzian model indicated that the dielectric loss deteriorates with an increase in the x value are the result of the lowered A-site cation ordering degree. The harmonic oscillator model was used to fit the infrared reflection spectra, and the obtained complex dielectric response was extrapolated down to the microwave region. The infrared reflection spectra show that the vibrational modes related to A-site cations at lower frequencies (i.e., <150 cm-1) play the most important role in the microwave dielectric properties of CLST ceramics. The optimal microwave dielectric properties were found to be εr = 109.4, Q x f = 4698 GHz, and Tf = 1.6 ppm/°C in the sample of 0.22CaTiO3-0.78(Li0.5Sm0.5)TiO3.</description><subject>Cations</subject><subject>Ceramics</subject><subject>Composition effects</subject><subject>Dielectric loss</subject><subject>Dielectric properties</subject><subject>Infrared reflection</subject><subject>Infrared spectra</subject><subject>Perovskite</subject><subject>Perovskite structure</subject><subject>Q factors</subject><subject>Raman spectra</subject><subject>Samarium</subject><subject>Spectrum analysis</subject><subject>Studies</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqNj0FLw0AQhRdRMFr_w4CX9rCy27Uxe5SgeCh4sOeUTTKFKUm27mza_hh_rGsQvHqaj8ebN28uRKaLJyMf89xeikzZ5UoWpiiuxQ3zXimlrdGZ-Cp9CNi5SH6AGuMJcYAj1WFSXAe9b5HB7-BZMkWEpDK4oYWemuBP7ojQEnbYxEANHII_YIiUVmiAuZbnBZRuQ-8VjzWYSp5hvp6Y1MOq-ugn_sHFnwkaDC7F80xc7VzHePc7b8X968umfJPpzOeIHLd7P4bUkrfa5tYaVaSX_-f6BmwWWZM</recordid><startdate>20171230</startdate><enddate>20171230</enddate><creator>Ning, Fanfan</creator><creator>Gan, Lin</creator><creator>Yuan, Shifeng</creator><creator>Qi, Zeming</creator><creator>Jiang, Juan</creator><creator>Zhang, Tianjin</creator><general>Elsevier BV</general><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20171230</creationdate><title>Correlation between vibrational modes of A-site ions and microwave dielectric properties in (1-x) CaTiO^sub 3^-x (L^sub i0.5^Sm^sub 0.5^)TiO^sub 3^ ceramics</title><author>Ning, Fanfan ; Gan, Lin ; Yuan, Shifeng ; Qi, Zeming ; Jiang, Juan ; Zhang, Tianjin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_19699308873</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Cations</topic><topic>Ceramics</topic><topic>Composition effects</topic><topic>Dielectric loss</topic><topic>Dielectric properties</topic><topic>Infrared reflection</topic><topic>Infrared spectra</topic><topic>Perovskite</topic><topic>Perovskite structure</topic><topic>Q factors</topic><topic>Raman spectra</topic><topic>Samarium</topic><topic>Spectrum analysis</topic><topic>Studies</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ning, Fanfan</creatorcontrib><creatorcontrib>Gan, Lin</creatorcontrib><creatorcontrib>Yuan, Shifeng</creatorcontrib><creatorcontrib>Qi, Zeming</creatorcontrib><creatorcontrib>Jiang, Juan</creatorcontrib><creatorcontrib>Zhang, Tianjin</creatorcontrib><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ning, Fanfan</au><au>Gan, Lin</au><au>Yuan, Shifeng</au><au>Qi, Zeming</au><au>Jiang, Juan</au><au>Zhang, Tianjin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Correlation between vibrational modes of A-site ions and microwave dielectric properties in (1-x) CaTiO^sub 3^-x (L^sub i0.5^Sm^sub 0.5^)TiO^sub 3^ ceramics</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2017-12-30</date><risdate>2017</risdate><volume>729</volume><spage>742</spage><pages>742-</pages><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>(1-x)CaTiO3-x(Li0.5Sm0.5)TiO3 (0.7 ≤ x ≤ 0.8, CLST) ceramics with an orthorhombic perovskite structure were fabricated by a conventional solid-state reaction method. The effects of composition variation on the microwave dielectric properties were studied in detail. The permittivity (εr) and quality factor (Q x f) value decreased with an increase in the x value, and the temperature coefficient of the resonant frequency (Tf) reached nearly zero. Raman and infrared reflection spectroscopy were employed to reveal the relationship between vibrational modes and microwave dielectric properties. The Raman spectra fitted with the Lorentzian model indicated that the dielectric loss deteriorates with an increase in the x value are the result of the lowered A-site cation ordering degree. The harmonic oscillator model was used to fit the infrared reflection spectra, and the obtained complex dielectric response was extrapolated down to the microwave region. The infrared reflection spectra show that the vibrational modes related to A-site cations at lower frequencies (i.e., <150 cm-1) play the most important role in the microwave dielectric properties of CLST ceramics. The optimal microwave dielectric properties were found to be εr = 109.4, Q x f = 4698 GHz, and Tf = 1.6 ppm/°C in the sample of 0.22CaTiO3-0.78(Li0.5Sm0.5)TiO3.</abstract><cop>Lausanne</cop><pub>Elsevier BV</pub></addata></record> |
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| subjects | Cations Ceramics Composition effects Dielectric loss Dielectric properties Infrared reflection Infrared spectra Perovskite Perovskite structure Q factors Raman spectra Samarium Spectrum analysis Studies |
| title | Correlation between vibrational modes of A-site ions and microwave dielectric properties in (1-x) CaTiO^sub 3^-x (L^sub i0.5^Sm^sub 0.5^)TiO^sub 3^ ceramics |
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