Study of structural, optical, and dielectric properties of sol–gel derived ZnFe2O4–Al2O3 composite nanoparticles
The optical and dielectric properties of the ZnFe 2 O 4 –Al 2 O 3 nanocomposite are investigated and compared with the ZnFe 2 O 4 –SiO 2 nanocomposite and ZnFe 2 O 4 nanoparticles. The nanocomposite is prepared by simple sol–gel auto-combustion method. The prepared samples are annealed at 800 °C for...
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| creator | Varpe, Ashwini S. Deshpande, Mrinalini D. |
| description | The optical and dielectric properties of the ZnFe
2
O
4
–Al
2
O
3
nanocomposite are investigated and compared with the ZnFe
2
O
4
–SiO
2
nanocomposite and ZnFe
2
O
4
nanoparticles. The nanocomposite is prepared by simple sol–gel auto-combustion method. The prepared samples are annealed at 800 °C for 6 h. The samples are characterized by infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. The formation of single phase cubic spinel structure for ZnFe
2
O
4
nanoparticles is confirmed by X-ray diffraction analysis and the average crystallite size is 52.09 nm. In nanocomposite form the reduction in the crystallite size is observed. Studies on infrared spectroscopy confirm the presence of Al
2
O
3
and SiO
2
along with ZnFe
2
O
4
nanoparticles. Transmission electron microscopy observations reveal that ZnFe
2
O
4
nanoparticles are well dispersed in alumina as well as in silica matrix and not highly agglomerated. From UV–visible spectroscopy, the calculated band gap of ZnFe
2
O
4
is 2.89 eV where in presence of alumina matrix the band gap of nanocomposite increases to 2.97 eV. In presence of SiO
2
, a decrease in the band gap of ZnFe
2
O
4
nanoparticles is observed (2.75 eV). Dielectric properties such as dielectric constant, dielectric loss of synthesized nanocomposites are studied as a function of frequency. The dielectric study reveals that ZnFe
2
O
4
–Al
2
O
3
exhibits a significantly enhanced dielectric constant and dielectric loss as compared to that of ZnFe
2
O
4
–SiO
2
as well as ZnFe
2
O
4
nanoparticles. At lower frequencies, the value of dielectric constant is in the order of 10
4
for ZnFe
2
O
4
nanoparticles and in presence of alumina, it enhances to the order of 10
5
. The composite structure exhibits a significantly enhanced ac conductivity with respect to ZnFe
2
O
4
as well as ZnFe
2
O
4
–SiO
2
nanocomposite. The above results suggest that ZnFe
2
O
4
–Al
2
O
3
nanocomposite can be a promising candidate for the development of optoelectronic devices.
Highlights
ZnFe
2
O
4
–Al
2
O
3
nanocomposite is synthesized by sol–gel auto-combustion method.
The structural, optical and dielectric properties ZnFe
2
O
4
–Al
2
O
3
are compared with ZnFe
2
O
4
nanoparticles.
ZnFe
2
O
4
–Al
2
O
3
nanocomposite materials have shown the enhancement in the band gap with dramatical decrease in particle size as compared to that of ZnFe
2
O
4
.
ZnFe
2
O
4
–Al
2
O
3
nanocomposite shows the superior dielectr |
| doi_str_mv | 10.1007/s10971-020-05408-7 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2471531209</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2471531209</sourcerecordid><originalsourceid>FETCH-LOGICAL-c356t-7876739adc7354e83fe1bbe9e746560452e292481950f8c8f7dcdd1acc402d253</originalsourceid><addsrcrecordid>eNp9kM1KxDAQx4MouK6-gKeAV6uTr6Y9LotfIOxBvXgJNZlKl25Tk1Tw5jv4hj6J0RW8eZph-P1mhj8hxwzOGIA-jwxqzQrgUICSUBV6h8yY0qKQlSx3yQxqXhWgQe-TgxjXABljekbSXZrcG_UtjSlMNk2h6U-pH1Nnv5tmcNR12KNNobN0DH7EkDqMP4bvP98_nrGnDkP3io4-DpfIVzJPFz1fCWr9ZvSxS0iHZvBjk1XbYzwke23TRzz6rXPycHlxv7wubldXN8vFbWGFKlOhK11qUTfOaqEkVqJF9vSENWpZqhKk4shrLitWK2grW7XaWedYY60E7rgSc3Ky3Zv_fpkwJrP2UxjyScOlZkowDnWm-JaywccYsDVj6DZNeDMMzHe6Zpuuyeman3SNzpLYSjHDwzOGv9X_WF9YD39j</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2471531209</pqid></control><display><type>article</type><title>Study of structural, optical, and dielectric properties of sol–gel derived ZnFe2O4–Al2O3 composite nanoparticles</title><source>Springer Nature - Complete Springer Journals</source><creator>Varpe, Ashwini S. ; Deshpande, Mrinalini D.</creator><creatorcontrib>Varpe, Ashwini S. ; Deshpande, Mrinalini D.</creatorcontrib><description>The optical and dielectric properties of the ZnFe
2
O
4
–Al
2
O
3
nanocomposite are investigated and compared with the ZnFe
2
O
4
–SiO
2
nanocomposite and ZnFe
2
O
4
nanoparticles. The nanocomposite is prepared by simple sol–gel auto-combustion method. The prepared samples are annealed at 800 °C for 6 h. The samples are characterized by infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. The formation of single phase cubic spinel structure for ZnFe
2
O
4
nanoparticles is confirmed by X-ray diffraction analysis and the average crystallite size is 52.09 nm. In nanocomposite form the reduction in the crystallite size is observed. Studies on infrared spectroscopy confirm the presence of Al
2
O
3
and SiO
2
along with ZnFe
2
O
4
nanoparticles. Transmission electron microscopy observations reveal that ZnFe
2
O
4
nanoparticles are well dispersed in alumina as well as in silica matrix and not highly agglomerated. From UV–visible spectroscopy, the calculated band gap of ZnFe
2
O
4
is 2.89 eV where in presence of alumina matrix the band gap of nanocomposite increases to 2.97 eV. In presence of SiO
2
, a decrease in the band gap of ZnFe
2
O
4
nanoparticles is observed (2.75 eV). Dielectric properties such as dielectric constant, dielectric loss of synthesized nanocomposites are studied as a function of frequency. The dielectric study reveals that ZnFe
2
O
4
–Al
2
O
3
exhibits a significantly enhanced dielectric constant and dielectric loss as compared to that of ZnFe
2
O
4
–SiO
2
as well as ZnFe
2
O
4
nanoparticles. At lower frequencies, the value of dielectric constant is in the order of 10
4
for ZnFe
2
O
4
nanoparticles and in presence of alumina, it enhances to the order of 10
5
. The composite structure exhibits a significantly enhanced ac conductivity with respect to ZnFe
2
O
4
as well as ZnFe
2
O
4
–SiO
2
nanocomposite. The above results suggest that ZnFe
2
O
4
–Al
2
O
3
nanocomposite can be a promising candidate for the development of optoelectronic devices.
Highlights
ZnFe
2
O
4
–Al
2
O
3
nanocomposite is synthesized by sol–gel auto-combustion method.
The structural, optical and dielectric properties ZnFe
2
O
4
–Al
2
O
3
are compared with ZnFe
2
O
4
nanoparticles.
ZnFe
2
O
4
–Al
2
O
3
nanocomposite materials have shown the enhancement in the band gap with dramatical decrease in particle size as compared to that of ZnFe
2
O
4
.
ZnFe
2
O
4
–Al
2
O
3
nanocomposite shows the superior dielectric constant and ac conductivity with low dielectric loss as compared to that of ZnFe
2
O
4
.
The dielectric properties are also compared with ZnFe
2
O
4
–SiO
2
.</description><identifier>ISSN: 0928-0707</identifier><identifier>EISSN: 1573-4846</identifier><identifier>DOI: 10.1007/s10971-020-05408-7</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Aluminum oxide ; Ceramics ; Chemistry and Materials Science ; Combustion ; Composite structures ; Composites ; Crystallites ; Dielectric loss ; Dielectric properties ; electronic ; Energy gap ; Field emission microscopy ; Field emission spectroscopy ; Glass ; Infrared spectroscopy ; Inorganic Chemistry ; magnetic and ferroelectric applications ; Materials Science ; Nanocomposites ; Nanoparticles ; Nanotechnology ; Natural Materials ; Optical and Electronic Materials ; Optical properties ; Optoelectronic devices ; Original Paper: Sol–gel and hybrid materials for dielectric ; Permittivity ; Silicon dioxide ; Sol-gel processes ; Spectrum analysis ; Synthesis ; Transmission electron microscopy ; X-ray diffraction ; Zinc ferrites</subject><ispartof>Journal of sol-gel science and technology, 2020-12, Vol.96 (3), p.718-727</ispartof><rights>Springer Science+Business Media, LLC, part of Springer Nature 2020</rights><rights>Springer Science+Business Media, LLC, part of Springer Nature 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c356t-7876739adc7354e83fe1bbe9e746560452e292481950f8c8f7dcdd1acc402d253</citedby><cites>FETCH-LOGICAL-c356t-7876739adc7354e83fe1bbe9e746560452e292481950f8c8f7dcdd1acc402d253</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10971-020-05408-7$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10971-020-05408-7$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Varpe, Ashwini S.</creatorcontrib><creatorcontrib>Deshpande, Mrinalini D.</creatorcontrib><title>Study of structural, optical, and dielectric properties of sol–gel derived ZnFe2O4–Al2O3 composite nanoparticles</title><title>Journal of sol-gel science and technology</title><addtitle>J Sol-Gel Sci Technol</addtitle><description>The optical and dielectric properties of the ZnFe
2
O
4
–Al
2
O
3
nanocomposite are investigated and compared with the ZnFe
2
O
4
–SiO
2
nanocomposite and ZnFe
2
O
4
nanoparticles. The nanocomposite is prepared by simple sol–gel auto-combustion method. The prepared samples are annealed at 800 °C for 6 h. The samples are characterized by infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. The formation of single phase cubic spinel structure for ZnFe
2
O
4
nanoparticles is confirmed by X-ray diffraction analysis and the average crystallite size is 52.09 nm. In nanocomposite form the reduction in the crystallite size is observed. Studies on infrared spectroscopy confirm the presence of Al
2
O
3
and SiO
2
along with ZnFe
2
O
4
nanoparticles. Transmission electron microscopy observations reveal that ZnFe
2
O
4
nanoparticles are well dispersed in alumina as well as in silica matrix and not highly agglomerated. From UV–visible spectroscopy, the calculated band gap of ZnFe
2
O
4
is 2.89 eV where in presence of alumina matrix the band gap of nanocomposite increases to 2.97 eV. In presence of SiO
2
, a decrease in the band gap of ZnFe
2
O
4
nanoparticles is observed (2.75 eV). Dielectric properties such as dielectric constant, dielectric loss of synthesized nanocomposites are studied as a function of frequency. The dielectric study reveals that ZnFe
2
O
4
–Al
2
O
3
exhibits a significantly enhanced dielectric constant and dielectric loss as compared to that of ZnFe
2
O
4
–SiO
2
as well as ZnFe
2
O
4
nanoparticles. At lower frequencies, the value of dielectric constant is in the order of 10
4
for ZnFe
2
O
4
nanoparticles and in presence of alumina, it enhances to the order of 10
5
. The composite structure exhibits a significantly enhanced ac conductivity with respect to ZnFe
2
O
4
as well as ZnFe
2
O
4
–SiO
2
nanocomposite. The above results suggest that ZnFe
2
O
4
–Al
2
O
3
nanocomposite can be a promising candidate for the development of optoelectronic devices.
Highlights
ZnFe
2
O
4
–Al
2
O
3
nanocomposite is synthesized by sol–gel auto-combustion method.
The structural, optical and dielectric properties ZnFe
2
O
4
–Al
2
O
3
are compared with ZnFe
2
O
4
nanoparticles.
ZnFe
2
O
4
–Al
2
O
3
nanocomposite materials have shown the enhancement in the band gap with dramatical decrease in particle size as compared to that of ZnFe
2
O
4
.
ZnFe
2
O
4
–Al
2
O
3
nanocomposite shows the superior dielectric constant and ac conductivity with low dielectric loss as compared to that of ZnFe
2
O
4
.
The dielectric properties are also compared with ZnFe
2
O
4
–SiO
2
.</description><subject>Aluminum oxide</subject><subject>Ceramics</subject><subject>Chemistry and Materials Science</subject><subject>Combustion</subject><subject>Composite structures</subject><subject>Composites</subject><subject>Crystallites</subject><subject>Dielectric loss</subject><subject>Dielectric properties</subject><subject>electronic</subject><subject>Energy gap</subject><subject>Field emission microscopy</subject><subject>Field emission spectroscopy</subject><subject>Glass</subject><subject>Infrared spectroscopy</subject><subject>Inorganic Chemistry</subject><subject>magnetic and ferroelectric applications</subject><subject>Materials Science</subject><subject>Nanocomposites</subject><subject>Nanoparticles</subject><subject>Nanotechnology</subject><subject>Natural Materials</subject><subject>Optical and Electronic Materials</subject><subject>Optical properties</subject><subject>Optoelectronic devices</subject><subject>Original Paper: Sol–gel and hybrid materials for dielectric</subject><subject>Permittivity</subject><subject>Silicon dioxide</subject><subject>Sol-gel processes</subject><subject>Spectrum analysis</subject><subject>Synthesis</subject><subject>Transmission electron microscopy</subject><subject>X-ray diffraction</subject><subject>Zinc ferrites</subject><issn>0928-0707</issn><issn>1573-4846</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp9kM1KxDAQx4MouK6-gKeAV6uTr6Y9LotfIOxBvXgJNZlKl25Tk1Tw5jv4hj6J0RW8eZph-P1mhj8hxwzOGIA-jwxqzQrgUICSUBV6h8yY0qKQlSx3yQxqXhWgQe-TgxjXABljekbSXZrcG_UtjSlMNk2h6U-pH1Nnv5tmcNR12KNNobN0DH7EkDqMP4bvP98_nrGnDkP3io4-DpfIVzJPFz1fCWr9ZvSxS0iHZvBjk1XbYzwke23TRzz6rXPycHlxv7wubldXN8vFbWGFKlOhK11qUTfOaqEkVqJF9vSENWpZqhKk4shrLitWK2grW7XaWedYY60E7rgSc3Ky3Zv_fpkwJrP2UxjyScOlZkowDnWm-JaywccYsDVj6DZNeDMMzHe6Zpuuyeman3SNzpLYSjHDwzOGv9X_WF9YD39j</recordid><startdate>20201201</startdate><enddate>20201201</enddate><creator>Varpe, Ashwini S.</creator><creator>Deshpande, Mrinalini D.</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20201201</creationdate><title>Study of structural, optical, and dielectric properties of sol–gel derived ZnFe2O4–Al2O3 composite nanoparticles</title><author>Varpe, Ashwini S. ; Deshpande, Mrinalini D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c356t-7876739adc7354e83fe1bbe9e746560452e292481950f8c8f7dcdd1acc402d253</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aluminum oxide</topic><topic>Ceramics</topic><topic>Chemistry and Materials Science</topic><topic>Combustion</topic><topic>Composite structures</topic><topic>Composites</topic><topic>Crystallites</topic><topic>Dielectric loss</topic><topic>Dielectric properties</topic><topic>electronic</topic><topic>Energy gap</topic><topic>Field emission microscopy</topic><topic>Field emission spectroscopy</topic><topic>Glass</topic><topic>Infrared spectroscopy</topic><topic>Inorganic Chemistry</topic><topic>magnetic and ferroelectric applications</topic><topic>Materials Science</topic><topic>Nanocomposites</topic><topic>Nanoparticles</topic><topic>Nanotechnology</topic><topic>Natural Materials</topic><topic>Optical and Electronic Materials</topic><topic>Optical properties</topic><topic>Optoelectronic devices</topic><topic>Original Paper: Sol–gel and hybrid materials for dielectric</topic><topic>Permittivity</topic><topic>Silicon dioxide</topic><topic>Sol-gel processes</topic><topic>Spectrum analysis</topic><topic>Synthesis</topic><topic>Transmission electron microscopy</topic><topic>X-ray diffraction</topic><topic>Zinc ferrites</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Varpe, Ashwini S.</creatorcontrib><creatorcontrib>Deshpande, Mrinalini D.</creatorcontrib><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Database (Proquest)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central</collection><collection>SciTech Premium Collection (Proquest) (PQ_SDU_P3)</collection><collection>https://resources.nclive.org/materials</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering 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>Engineering collection</collection><jtitle>Journal of sol-gel science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Varpe, Ashwini S.</au><au>Deshpande, Mrinalini D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Study of structural, optical, and dielectric properties of sol–gel derived ZnFe2O4–Al2O3 composite nanoparticles</atitle><jtitle>Journal of sol-gel science and technology</jtitle><stitle>J Sol-Gel Sci Technol</stitle><date>2020-12-01</date><risdate>2020</risdate><volume>96</volume><issue>3</issue><spage>718</spage><epage>727</epage><pages>718-727</pages><issn>0928-0707</issn><eissn>1573-4846</eissn><abstract>The optical and dielectric properties of the ZnFe
2
O
4
–Al
2
O
3
nanocomposite are investigated and compared with the ZnFe
2
O
4
–SiO
2
nanocomposite and ZnFe
2
O
4
nanoparticles. The nanocomposite is prepared by simple sol–gel auto-combustion method. The prepared samples are annealed at 800 °C for 6 h. The samples are characterized by infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. The formation of single phase cubic spinel structure for ZnFe
2
O
4
nanoparticles is confirmed by X-ray diffraction analysis and the average crystallite size is 52.09 nm. In nanocomposite form the reduction in the crystallite size is observed. Studies on infrared spectroscopy confirm the presence of Al
2
O
3
and SiO
2
along with ZnFe
2
O
4
nanoparticles. Transmission electron microscopy observations reveal that ZnFe
2
O
4
nanoparticles are well dispersed in alumina as well as in silica matrix and not highly agglomerated. From UV–visible spectroscopy, the calculated band gap of ZnFe
2
O
4
is 2.89 eV where in presence of alumina matrix the band gap of nanocomposite increases to 2.97 eV. In presence of SiO
2
, a decrease in the band gap of ZnFe
2
O
4
nanoparticles is observed (2.75 eV). Dielectric properties such as dielectric constant, dielectric loss of synthesized nanocomposites are studied as a function of frequency. The dielectric study reveals that ZnFe
2
O
4
–Al
2
O
3
exhibits a significantly enhanced dielectric constant and dielectric loss as compared to that of ZnFe
2
O
4
–SiO
2
as well as ZnFe
2
O
4
nanoparticles. At lower frequencies, the value of dielectric constant is in the order of 10
4
for ZnFe
2
O
4
nanoparticles and in presence of alumina, it enhances to the order of 10
5
. The composite structure exhibits a significantly enhanced ac conductivity with respect to ZnFe
2
O
4
as well as ZnFe
2
O
4
–SiO
2
nanocomposite. The above results suggest that ZnFe
2
O
4
–Al
2
O
3
nanocomposite can be a promising candidate for the development of optoelectronic devices.
Highlights
ZnFe
2
O
4
–Al
2
O
3
nanocomposite is synthesized by sol–gel auto-combustion method.
The structural, optical and dielectric properties ZnFe
2
O
4
–Al
2
O
3
are compared with ZnFe
2
O
4
nanoparticles.
ZnFe
2
O
4
–Al
2
O
3
nanocomposite materials have shown the enhancement in the band gap with dramatical decrease in particle size as compared to that of ZnFe
2
O
4
.
ZnFe
2
O
4
–Al
2
O
3
nanocomposite shows the superior dielectric constant and ac conductivity with low dielectric loss as compared to that of ZnFe
2
O
4
.
The dielectric properties are also compared with ZnFe
2
O
4
–SiO
2
.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10971-020-05408-7</doi><tpages>10</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0928-0707 |
| ispartof | Journal of sol-gel science and technology, 2020-12, Vol.96 (3), p.718-727 |
| issn | 0928-0707 1573-4846 |
| language | eng |
| recordid | cdi_proquest_journals_2471531209 |
| source | Springer Nature - Complete Springer Journals |
| subjects | Aluminum oxide Ceramics Chemistry and Materials Science Combustion Composite structures Composites Crystallites Dielectric loss Dielectric properties electronic Energy gap Field emission microscopy Field emission spectroscopy Glass Infrared spectroscopy Inorganic Chemistry magnetic and ferroelectric applications Materials Science Nanocomposites Nanoparticles Nanotechnology Natural Materials Optical and Electronic Materials Optical properties Optoelectronic devices Original Paper: Sol–gel and hybrid materials for dielectric Permittivity Silicon dioxide Sol-gel processes Spectrum analysis Synthesis Transmission electron microscopy X-ray diffraction Zinc ferrites |
| title | Study of structural, optical, and dielectric properties of sol–gel derived ZnFe2O4–Al2O3 composite nanoparticles |
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