| BaTiO3/ IPNs的制备及介电性能与阻尼性能的相关性 |
| BaTiO3/ IPNs Composites: Preparation and Correlation between Dielectric Characters and Damping Performance |
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| 摘要: |
| 关键词: 钛酸钡纳米晶 互穿聚合物网络(IPNs) 复合材料 阻尼性能 介电性能 |
| 基金项目: |
| Abstract: BaTiO3/ Interpenetrating Polymer Networks (IPNs) composites were prepared by combination of BaTiO3nanocrystal in tetragonal system and polyurethane(PU) / unsaturated polyester (UP) interpenetrating polymer networks (IPNs). The tetragonal nanocrystalline BaTiO3was obtained by hydrothermal process and calcination at 1 200 ℃. The prepared materials were polarized with high voltage and small current, and protected by silicon oil. The morphology of BaTiO3/ IPNs and the effect of combination of BaTiO3on the damping behavior of IPNs were studied. The relationship between damping performance and dielectric charater was also discussed in terms of dielectric constant and dielectric loss measured. The results show that the areas under loss modulus (E″) and the values of loss factors (tanδ) were both increased by combination of BaTiO3into IPNs system. The maximum value of E″ increased above 100 MPa compared with pure IPNs and the extent increased more remarkably after polarizing process. The main and shoulder peak of tanδ curves both moved toward higher temperature ranges, and the temperature ranges of tanδ>0.3 was higher than 100 ℃. Moreover, through polarizing process, the composites exhibited synergistic action caused by elastomeric damping, interfacial abrasive damping and piezoelectric damping mechanisms. The relationship study of damping property and dielectric characters showed that the temperature ranges exhibited excellent consistency of maximum dielectric loss and modulus with damping loss factor. |
| Keywords: BaTiO3nanocrystal interpenetrating polymer networks composites damping property dielectric characters |
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| 唐冬雁,强亮生,金 政,赵连城.BaTiO3/ IPNs的制备及介电性能与阻尼性能的相关性[J].无机化学学报,2004,20(12):1485-1488. |
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