Low-temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramics
In this study， 0.95MgTiO3-0.05CaTiO3 powders are synthesized via a high-temperature solid-phase reaction， utilizing TiO2，CaCO3，and Mg（OH）2 as the primary reactants. Guided by the phase diagram， sintering aids comprising Li2B4O7-Al2O3， which possess a low melting point， are formulated to facilitate t...
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Journal of Materials Engineering
2025-05-01
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| Series: | Cailiao gongcheng |
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| Online Access: | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000766 |
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| author | LIN Wei LIU Zheng WANG Yiwei KUANG Jianlei |
| author_facet | LIN Wei LIU Zheng WANG Yiwei KUANG Jianlei |
| author_sort | LIN Wei |
| collection | DOAJ |
| description | In this study， 0.95MgTiO3-0.05CaTiO3 powders are synthesized via a high-temperature solid-phase reaction， utilizing TiO2，CaCO3，and Mg（OH）2 as the primary reactants. Guided by the phase diagram， sintering aids comprising Li2B4O7-Al2O3， which possess a low melting point， are formulated to facilitate the low-temperature sintering process of 0.95MgTiO3-0.05CaTiO3 microwave dielectric ceramics. The study comprehensively investigates the influence of the synthesis temperature （900-1100 ℃） on the phase composition of calcium magnesium titanate powder， as well as the effects of sintering temperature （1175-1250 ℃） and aid content （1%-5%， mass fraction， the same below） on the density， microstructure， dielectric constant， quality factor， and frequency-temperature coefficient of calcium magnesium titanate ceramics. The results indicates that 0.95MgTiO3-0.05CaTiO3 powders could be successfully synthesized at a reaction temperature of 1100 ℃. The incorporation of sintering aids effectively reduced the sintering temperature of the ceramics. However， excessive addition （5%） resulted in decreased density and dielectric properties. Optimal performance is achieved with an aid content of 3% and a sintering temperature of 1225 ℃， producing 0.95MgTiO3-0.05CaTiO3 ceramic with a relative density of 98.70%， a dielectric constant of 20.38， a quality factor of 37240 GHz， and a frequency-temperature coefficient of -9.6×10-6 ℃-1. |
| format | Article |
| id | doaj-art-45abfe4036b64a34a7129ecd0bc0479d |
| institution | OA Journals |
| issn | 1001-4381 |
| language | zho |
| publishDate | 2025-05-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj-art-45abfe4036b64a34a7129ecd0bc0479d2025-08-20T02:25:48ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812025-05-0153514515110.11868/j.issn.1001-4381.2023.0007661001-4381（2025）05-0145-07Low-temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramicsLIN Wei0LIU Zheng1WANG Yiwei2KUANG Jianlei3National Demonstration Center for Experimental Materials Education，University of Science and Technology Beijing， Beijing 100083，ChinaSchool of Materials Science and Engineering， University of Science and Technology Beijing， Beijing 100083，ChinaSchool of Materials Science and Engineering， University of Science and Technology Beijing， Beijing 100083，ChinaSchool of Materials Science and Engineering， University of Science and Technology Beijing， Beijing 100083，ChinaIn this study， 0.95MgTiO3-0.05CaTiO3 powders are synthesized via a high-temperature solid-phase reaction， utilizing TiO2，CaCO3，and Mg（OH）2 as the primary reactants. Guided by the phase diagram， sintering aids comprising Li2B4O7-Al2O3， which possess a low melting point， are formulated to facilitate the low-temperature sintering process of 0.95MgTiO3-0.05CaTiO3 microwave dielectric ceramics. The study comprehensively investigates the influence of the synthesis temperature （900-1100 ℃） on the phase composition of calcium magnesium titanate powder， as well as the effects of sintering temperature （1175-1250 ℃） and aid content （1%-5%， mass fraction， the same below） on the density， microstructure， dielectric constant， quality factor， and frequency-temperature coefficient of calcium magnesium titanate ceramics. The results indicates that 0.95MgTiO3-0.05CaTiO3 powders could be successfully synthesized at a reaction temperature of 1100 ℃. The incorporation of sintering aids effectively reduced the sintering temperature of the ceramics. However， excessive addition （5%） resulted in decreased density and dielectric properties. Optimal performance is achieved with an aid content of 3% and a sintering temperature of 1225 ℃， producing 0.95MgTiO3-0.05CaTiO3 ceramic with a relative density of 98.70%， a dielectric constant of 20.38， a quality factor of 37240 GHz， and a frequency-temperature coefficient of -9.6×10-6 ℃-1.https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000766calcium magnesium titanatemicrowave dielectric ceramiclow-temperature sinteringdielectric propertytemperature coefficient of frequency |
| spellingShingle | LIN Wei LIU Zheng WANG Yiwei KUANG Jianlei Low-temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramics Cailiao gongcheng calcium magnesium titanate microwave dielectric ceramic low-temperature sintering dielectric property temperature coefficient of frequency |
| title | Low-temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramics |
| title_full | Low-temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramics |
| title_fullStr | Low-temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramics |
| title_full_unstemmed | Low-temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramics |
| title_short | Low-temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramics |
| title_sort | low temperature sintering and dielectric properties of calcium magnesium titanate microwave dielectric ceramics |
| topic | calcium magnesium titanate microwave dielectric ceramic low-temperature sintering dielectric property temperature coefficient of frequency |
| url | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2023.000766 |
| work_keys_str_mv | AT linwei lowtemperaturesinteringanddielectricpropertiesofcalciummagnesiumtitanatemicrowavedielectricceramics AT liuzheng lowtemperaturesinteringanddielectricpropertiesofcalciummagnesiumtitanatemicrowavedielectricceramics AT wangyiwei lowtemperaturesinteringanddielectricpropertiesofcalciummagnesiumtitanatemicrowavedielectricceramics AT kuangjianlei lowtemperaturesinteringanddielectricpropertiesofcalciummagnesiumtitanatemicrowavedielectricceramics |