| Ni-BaTiO3 interface phenomenon of Co-fired PTCR by aqueous tape casting |
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| 引用本文： | 陈勇 龚树萍 黎慧 王法军 余石金 徐玲芳. Ni-BaTiO3 interface phenomenon of Co-fired PTCR by aqueous tape casting[J]. 中国有色金属学会会刊, 2007, 17(6): 1391-1395. DOI: 10.1016/S1003-6326(07)60283-0 |
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| 作者姓名： | 陈勇 龚树萍 黎慧 王法军 余石金 徐玲芳 |
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| 作者单位： | [1]Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China [2]Key Laboratory of Ferroelectric and Piezoelectric Materials and Devices of Hubei Province, School of Physics and Electronic Technology, Hubei University, Wuhan 430062, China |
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| 摘 要： | The green sheets with Ni paste as inner electrodes were sintered at 1 320 ℃ for 1 h under a N2/H2 mixing gas at an oxygen partial pressure p（O2）=10-8-10-12 MPa, and then reoxided at 900-1 000 ℃ to form multilayer positive temperature coefficient of resistance（PTCR）. During the experiments, electronic characteristic effects of PTC with different thicknesses were contrasted. A certain extending of Ni diffusion is beneficial to the ohmic contact of multilayer PTCR but excessive diffusion is harmful to PTCR. The diffusion was studied by scanning electron microscopy（SEM） and energy-dispersive X-ray spectrometry（EDS）. Inter-diffusion of element takes place along the Ni-BaTiO3 interface, especially Ni diffusion to BaTiO3 dominated the process. Furthermore, the degree of Ni diffusion is very severe as ceramic layers are very thin.
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| 关 键 词： | Ni-BaTiO3 阳极 温度系数 扩散 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-07-15 |
Ni-BaTiO3 interface phenomenon of Co-fired PTCR by aqueous tape casting |
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| Yong CHEN, Shu-ping GONG, Hui LI, Fa-jun WANG, Shi-jin YU,Ling-fang XU. Ni-BaTiO3 interface phenomenon of Co-fired PTCR by aqueous tape casting[J]. Transactions of Nonferrous Metals Society of China, 2007, 17(6): 1391-1395. DOI: 10.1016/S1003-6326(07)60283-0 |
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| Authors: | Yong CHEN Shu-ping GONG Hui LI Fa-jun WANG Shi-jin YU Ling-fang XU |
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| Affiliation: | 1. Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Key Laboratory of Ferroelectric and Piezoelectric Materials and Devices of Hubei Province, School of Physics and Electronic Technology, Hubei University, Wuhan 430062, China |
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| Abstract: | The green sheets with Ni paste as inner electrodes were sintered at 1 320 deg;C for 1 h under a N2/H2 mixing gas at an oxygen partial pressure p(O2) = 10−8−1−12 MPa, and then reoxided at 900–1 000 deg;C to form multilayer positive temperature coefficient of resistance(PTCR). During the experiments, electronic characteristic effects of PTC with different thicknesses were contrasted. A certain extending of Ni diffusion is beneficial to the ohmic contact of multilayer PTCR but excessive diffusion is harmful to PTCR. The diffusion was studied by scanning electron microscopy(SEM) and energy-dispersive X-ray spectrometry(EDS). Inter-diffusion of element takes place along the Ni-BaTiO3 interface, especially Ni diffusion to BaTiO3 dominated the process. Furthermore, the degree of Ni diffusion is very severe as ceramic layers are very thin. |
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| Keywords: | Ni positive temperature coefficient of resistance BaTiO3 diffusion |
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