EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS
NIR-reflective Ni-doped ZnFe₂O₄ black pigments with the general formula of Zn(1-x)NixFe₂O₄ have been synthesized by a conventional solid-state reaction of ZnO, Fe₂O₃ and NiO. The effect of Ni doping was studied by adding various amounts of NiO, with x ranging from 0 to 1. Proportional amounts of ZnO...
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| Format: | Article |
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University of Chemistry and Technology, Prague
2020-03-01
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| Series: | Ceramics-Silikáty |
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http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1314
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| _version_ | 1818161554998165504 |
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| author | Mantana Suwan Nuchjarin Sangwong Supothina Sitthisuntorn |
| author_facet | Mantana Suwan Nuchjarin Sangwong Supothina Sitthisuntorn |
| author_sort | Mantana Suwan |
| collection | DOAJ |
| description | NIR-reflective Ni-doped ZnFe₂O₄ black pigments with the general formula of Zn(1-x)NixFe₂O₄ have been synthesized by a conventional solid-state reaction of ZnO, Fe₂O₃ and NiO. The effect of Ni doping was studied by adding various amounts of NiO, with x ranging from 0 to 1. Proportional amounts of ZnO, Fe₂O₃ and NiO were homogeneously mixed together by means of wet milling, followed by filtration and drying. Then, the mixtures were calcined at 1000 and 1100 °C for 3 h. XRD analysis of the undoped pigments revealed the presence of pure ZnFe₂O₄ in all synthesis conditions. The addition of NiO dopant into the ZnFe₂O₄ caused a gradual shift of the diffraction peaks toward higher angles due to the substitution of Zn2+ by the smaller Ni2+ to form the Zn(1-x)NixFe₂O₄. Upon the increase of NiO doping content and calcination temperature, the color hue of the pigments changed from light brown to brownish black, and a gradual reduction of the NIR reflectance was observed. For the black pigments which were synthesized at 1100 °C, the band-gap energy changed from 2.05 eV for ZnFe₂O₄ (x=0) to 1.65 eV for NiFe₂O₄ (x=1). At the optimum synthesis condition, resulting in black color hue and high NIR reflectance, the Zn0.5Ni0.5Fe₂O₄ pigment synthesized at 1100 °C had high NIR reflectance of 55.3%. |
| first_indexed | 2024-12-11T16:19:38Z |
| format | Article |
| id | doaj.art-d72e655c335e44a4b58edb7a89e18d1e |
| institution | Directory Open Access Journal |
| issn | 0862-5468 1804-5847 |
| language | English |
| last_indexed | 2024-12-11T16:19:38Z |
| publishDate | 2020-03-01 |
| publisher | University of Chemistry and Technology, Prague |
| record_format | Article |
| series | Ceramics-Silikáty |
| spelling | doaj.art-d72e655c335e44a4b58edb7a89e18d1e2022-12-22T00:58:52ZengUniversity of Chemistry and Technology, PragueCeramics-Silikáty0862-54681804-58472020-03-0164217217910.13168/cs.2020.000610.13168/cs.2020.0006.20200520054200EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTSMantana Suwan0Nuchjarin Sangwong1Supothina Sitthisuntorn2 National Metal and Materials Technology Center, National Science and Technology Development Agency (NSTDA), 114 Thailand Science Park Phahonyothin Rd., Khlong Luang, Pathum Thani 12120, Thailand National Metal and Materials Technology Center, National Science and Technology Development Agency (NSTDA), 114 Thailand Science Park Phahonyothin Rd., Khlong Luang, Pathum Thani 12120, Thailand National Metal and Materials Technology Center, National Science and Technology Development Agency (NSTDA), 114 Thailand Science Park Phahonyothin Rd., Khlong Luang, Pathum Thani 12120, Thailand NIR-reflective Ni-doped ZnFe₂O₄ black pigments with the general formula of Zn(1-x)NixFe₂O₄ have been synthesized by a conventional solid-state reaction of ZnO, Fe₂O₃ and NiO. The effect of Ni doping was studied by adding various amounts of NiO, with x ranging from 0 to 1. Proportional amounts of ZnO, Fe₂O₃ and NiO were homogeneously mixed together by means of wet milling, followed by filtration and drying. Then, the mixtures were calcined at 1000 and 1100 °C for 3 h. XRD analysis of the undoped pigments revealed the presence of pure ZnFe₂O₄ in all synthesis conditions. The addition of NiO dopant into the ZnFe₂O₄ caused a gradual shift of the diffraction peaks toward higher angles due to the substitution of Zn2+ by the smaller Ni2+ to form the Zn(1-x)NixFe₂O₄. Upon the increase of NiO doping content and calcination temperature, the color hue of the pigments changed from light brown to brownish black, and a gradual reduction of the NIR reflectance was observed. For the black pigments which were synthesized at 1100 °C, the band-gap energy changed from 2.05 eV for ZnFe₂O₄ (x=0) to 1.65 eV for NiFe₂O₄ (x=1). At the optimum synthesis condition, resulting in black color hue and high NIR reflectance, the Zn0.5Ni0.5Fe₂O₄ pigment synthesized at 1100 °C had high NIR reflectance of 55.3%. http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1314 zinc ferrite nir-reflective pigment cool pigment black pigment solid-state reaction |
| spellingShingle | Mantana Suwan Nuchjarin Sangwong Supothina Sitthisuntorn EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS Ceramics-Silikáty zinc ferrite nir-reflective pigment cool pigment black pigment solid-state reaction |
| title | EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS |
| title_full | EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS |
| title_fullStr | EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS |
| title_full_unstemmed | EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS |
| title_short | EFFECT OF Ni DOPING AND SYNTHESIS TEMPERATURE ON THE PROPERTIES OF NIR-REFLECTIVE ZnFe₂O₄ BLACK PIGMENTS |
| title_sort | effect of ni doping and synthesis temperature on the properties of nir reflective znfe₂o₄ black pigments |
| topic | zinc ferrite nir-reflective pigment cool pigment black pigment solid-state reaction |
| url |
http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=1314
|
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