TiO2 and Nb2O5 Content on Dielectric Properties of BaO-SrO-PbO-TiO2-Nb2O5-SiO2 Glass-Ceramics AITranslate
Abstract AITranslate
The glass-ceramic dielectric material is a composite material of glass and ceramic phase coexist. The glass-ceramic can achieve complete densification and possess high breakdown field strength. It can precipitate high dielectric constant ceramic phase through controlled crystallization process，so that the glass-ceramic has moderate dielectric constant. Therefore，as a new type of dielectric energy storage material，dielectric glass-ceramic has a good prospect in the application field of high-voltage capacitors. However，the low dielectric constant and high dielectric loss of glass-ceramic hinder the further development of this material. In this paper，titanate ceramic phase was introduced into niobate glass-ceramic system to increase the dielectric constant and alkali metal ions with small radius were removed to reduce the dielectric loss. BaO-SrO-PbO-TiO2-SiO2-Nb2O5 nanocomposite dielectric materials with different TiO2 and Nb2O5 contents were prepared via melting-quenching-controlled crystallization technology. And the effect of TiO2 and Nb2O5 contents on properties of BaO-SrO-PbO-TiO2-SiO2-Nb2O5 glass-ceramic system were characterized by X-ray diffraction （XRD），differential thermal analysis （DTA），scanning electron microscopy （SEM） and dielectric properties test. The results showed that the crystallization activation energy decreased gradually with the value of TiO2/Nb2O5 increased，which meant that the increased of TiO2 / Nb2O5 ratio in BaO-SrO-PbO-TiO2-SiO2-Nb2O5 glass-ceramic system was conducive to crystallize. XRD results showed the glass samples all had obvious amorphous characteristics，indicating there was no crystal phase precipitation in the glass matrix. The samples after crystallization treatment at 800 ℃ precipitated pyrochlore structure Pb2Nb2O7 phase，tungsten bronze structure （Ba，Sr，Pb） Nb2O6 phase and perovskite structure （Sr，Pb） TiO3 phase，and the intensity of the diffraction peak of Pb2Nb2O7 phase increased as the value of TiO2/Nb2O5 increased. It meant that the increased of TiO2/Nb2O5 ratio promoted the precipitation of Pb2Nb2O7 phase. With the increased of crystallization temperature，the diffraction peak intensity of Pb2Nb2O7 phase gradually decreased，but the diffraction peak intensity of （Sr，Pb） TiO3 and （Ba，Sr，Pb）Nb2O6 phase gradually increased. The results indicated that the increase of crystallization temperature inhibited the formation of Pb2Nb2O7 phase but promoted the growth of （Sr，Pb） TiO3 and （Ba，Sr，Pb） Nb2O6 phase. After the crystallization treatment at 900 ℃ and 1000 ℃，Pb2Nb2O7 phase still existed in the samples with more TiO2 content，but the diffraction peak intensity decreased with the increase of the crystallization treatment temperature. The microstructure analysis results showed that after crystallization treatment at 1000 ℃，the crystal particles of all samples were approximately spherical. The dielectric properties test showed that the dielectric constant and dielectric loss of the glass-ceramic sample increased with the increase of the crystallization temperature. This was attributed to the growth of ceramic phase with the increased of crystallization temperature. After crystallization at 800 ℃ and 900 ℃，the dielectric constant gradually decreased with the increase of the TiO2/Nb2O5 ratio，which caused by the precipitation of the low dielectric constant pyrochlore structure Pb2Nb2O7 phase. After crystallization at 1000 ℃，it was found that the dielectric constant increased firstly and then decreased with the increase of the ratio of TiO2/Nb2O5. The increase in dielectric constant was due to the change in the composition that promoted the precipitation of the perovskite structure titanate ceramic phase. The decrease in dielectric constant related to the precipitation of low dielectric constant phases. The glass-ceramic samples with excellent dielectric properties were obtained by adjusting TiO2 and Nb2O5 contents. The maximum dielectric constant （~1310） of the glass-ceramic with 12% TiO2 and 24% Nb2O5 contents was obtained，and the dielectric loss kept at a low level of 0.0093. The dielectric constant of glass-ceramic with TiO2 content of 10% and Nb2O5 content of 26% decreased slightly，but still higher than 1000，and dielectric loss decreased to 0.0079. Since no alkali mental ions with small radius were introduced into system，the dielectric loss kept below 0.01. At the same time，it had good temperature stability of dielectric constant，and the fluctuation range of dielectric constant was less than 10% at -40~80 ℃. It was also found that the polarization curves of glass-ceramic were slender，the residual polarization intensity was small，and the energy loss was small in the charging and discharging process，indicating that the material had high energy release efficiency. Therefore，BaO-SrO-PbO-TiO2-Nb2O5-SiO2 glass-ceramic as high voltage ceramic capacitor medium showed a good application prospect.
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Basic Information:
DOI：10.13373/j.cnki.cjrm.XY21090030
Chinese Library Classification Number:TN304.82
Citation Information:
The glass-ceramic dielectric material is a composite material of glass and ceramic phase coexist. The glass-ceramic can achieve complete densification and possess high breakdown field strength. It can precipitate high dielectric constant ceramic phase through controlled crystallization process，so that the glass-ceramic has moderate dielectric constant. Therefore，as a new type of dielectric energy storage material，dielectric glass-ceramic has a good prospect in the application field of high-voltage capacitors. However，the low dielectric constant and high dielectric loss of glass-ceramic hinder the further development of this material. In this paper，titanate ceramic phase was introduced into niobate glass-ceramic system to increase the dielectric constant and alkali metal ions with small radius were removed to reduce the dielectric loss. BaO-SrO-PbO-TiO2-SiO2-Nb2O5 nanocomposite dielectric materials with different TiO2 and Nb2O5 contents were prepared via melting-quenching-controlled crystallization technology. And the effect of TiO2 and Nb2O5 contents on properties of BaO-SrO-PbO-TiO2-SiO2-Nb2O5 glass-ceramic system were characterized by X-ray diffraction （XRD），differential thermal analysis （DTA），scanning electron microscopy （SEM） and dielectric properties test. The results showed that the crystallization activation energy decreased gradually with the value of TiO2/Nb2O5 increased，which meant that the increased of TiO2 / Nb2O5 ratio in BaO-SrO-PbO-TiO2-SiO2-Nb2O5 glass-ceramic system was conducive to crystallize. XRD results showed the glass samples all had obvious amorphous characteristics，indicating there was no crystal phase precipitation in the glass matrix. The samples after crystallization treatment at 800 ℃ precipitated pyrochlore structure Pb2Nb2O7 phase，tungsten bronze structure （Ba，Sr，Pb） Nb2O6 phase and perovskite structure （Sr，Pb） TiO3 phase，and the intensity of the diffraction peak of Pb2Nb2O7 phase increased as the value of TiO2/Nb2O5 increased. It meant that the increased of TiO2/Nb2O5 ratio promoted the precipitation of Pb2Nb2O7 phase. With the increased of crystallization temperature，the diffraction peak intensity of Pb2Nb2O7 phase gradually decreased，but the diffraction peak intensity of （Sr，Pb） TiO3 and （Ba，Sr，Pb）Nb2O6 phase gradually increased. The results indicated that the increase of crystallization temperature inhibited the formation of Pb2Nb2O7 phase but promoted the growth of （Sr，Pb） TiO3 and （Ba，Sr，Pb） Nb2O6 phase. After the crystallization treatment at 900 ℃ and 1000 ℃，Pb2Nb2O7 phase still existed in the samples with more TiO2 content，but the diffraction peak intensity decreased with the increase of the crystallization treatment temperature. The microstructure analysis results showed that after crystallization treatment at 1000 ℃，the crystal particles of all samples were approximately spherical. The dielectric properties test showed that the dielectric constant and dielectric loss of the glass-ceramic sample increased with the increase of the crystallization temperature. This was attributed to the growth of ceramic phase with the increased of crystallization temperature. After crystallization at 800 ℃ and 900 ℃，the dielectric constant gradually decreased with the increase of the TiO2/Nb2O5 ratio，which caused by the precipitation of the low dielectric constant pyrochlore structure Pb2Nb2O7 phase. After crystallization at 1000 ℃，it was found that the dielectric constant increased firstly and then decreased with the increase of the ratio of TiO2/Nb2O5. The increase in dielectric constant was due to the change in the composition that promoted the precipitation of the perovskite structure titanate ceramic phase. The decrease in dielectric constant related to the precipitation of low dielectric constant phases. The glass-ceramic samples with excellent dielectric properties were obtained by adjusting TiO2 and Nb2O5 contents. The maximum dielectric constant （~1310） of the glass-ceramic with 12% TiO2 and 24% Nb2O5 contents was obtained，and the dielectric loss kept at a low level of 0.0093. The dielectric constant of glass-ceramic with TiO2 content of 10% and Nb2O5 content of 26% decreased slightly，but still higher than 1000，and dielectric loss decreased to 0.0079. Since no alkali mental ions with small radius were introduced into system，the dielectric loss kept below 0.01. At the same time，it had good temperature stability of dielectric constant，and the fluctuation range of dielectric constant was less than 10% at -40~80 ℃. It was also found that the polarization curves of glass-ceramic were slender，the residual polarization intensity was small，and the energy loss was small in the charging and discharging process，indicating that the material had high energy release efficiency. Therefore，BaO-SrO-PbO-TiO2-Nb2O5-SiO2 glass-ceramic as high voltage ceramic capacitor medium showed a good application prospect.
quote
| GB/T 7714-2015 | [1] Junyou Chen, Qingmeng Zhang, Min Zhou, et al. TiO2 and Nb2O5 Content on Dielectric Properties of BaO-SrO-PbO-TiO2-Nb2O5-SiO2 Glass-Ceramics[J]. Chinese Journal of Rare Metals, 2024, 48(10): 1502-1509. DOI:10.13373/j.cnki.cjrm.XY21090030. |
| MLA | [1] Junyou Chen, et al., "TiO2 and Nb2O5 Content on Dielectric Properties of BaO-SrO-PbO-TiO2-Nb2O5-SiO2 Glass-Ceramics." Chinese Journal of Rare Metals, vol. 48, no. 10, 2024, pp. 1502-1509, https://doi.org/10.13373/j.cnki.cjrm.XY21090030. |
| APA | [1] Junyou Chen, Qingmeng Zhang, Min Zhou, & Yanyun Zhao. (2024). TiO2 and Nb2O5 Content on Dielectric Properties of BaO-SrO-PbO-TiO2-Nb2O5-SiO2 Glass-Ceramics. Chinese Journal of Rare Metals, 48(10), 1502-1509. https://doi.org/10.13373/j.cnki.cjrm.XY21090030 |
| IEEE | [1] Junyou Chen, Qingmeng Zhang, Min Zhou, and Yanyun Zhao, "TiO2 and Nb2O5 Content on Dielectric Properties of BaO-SrO-PbO-TiO2-Nb2O5-SiO2 Glass-Ceramics," Chinese Journal of Rare Metals, vol. 48, no. 10, pp. 1502-1509, 2024, doi: 10.13373/j.cnki.cjrm.XY21090030. keywords: {glass ceramic；;dielectric properties；;high dielectric constant；;low dielectric loss} |