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題 名 | Polymer Composite Varistor=高分子型變阻器 |
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作 者 | 林炯志; 胡文華; 李偉雄; 孫長春; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 37:6 民95.11 |
頁 次 | 頁551-555 |
分類號 | 448.5 |
關鍵詞 | 聚乙烯; 變阻器; Microbial growth; Modeling; Double-substrate; Dynamic behavior; |
語 文 | 英文(English) |
中文摘要 | 以線性低密度聚乙烯作為高分子母體,850、950及1100℃燒結5小時之變阻器粉末作為功能性填充物所形成之非線性高分子複合材料,可以作為電壓限制、電流(能量)限制且能自我保護的新型複合材料。功能性填充顆粒作用如同變阻器是因為它們的晶界特性。晶界特性可以藉由不同的組成與燒結條件作調整。當施加電場高於填充顆粒的崩潰電場時,則電流密度急遽增加。材料如果因此而高達一臨界溫度時,則高分子母體會降低導電度。因此過電壓是由填充顆粒所限制(變阻器效應),而過電流則是由高分子母體所限制(正溫度係數效應)。在這文章中,我們研究填充材料的準備條件及填充顆粒在高分子中的含量對電場-電流密度特性的影響,並建議可能的非線性電-熱切換機構。 |
英文摘要 | A reusable nonlinear polymeric composite varistor composed of a linear low density polyethylene (LLDPE) as the matrix and doped zinc oxide varistor powders as the functional fillers, sintered at 850, 950 and 1100℃ for 5 h, is used as a novel material to limit excess voltage, current or power. The functional fillers act as varistors due to their grain boundary characteristics which can be adjusted by different formula and sintering conditions. When applied field is above breakdown field of the filler the current density increases abrupt if a critical temperature is reached. Thereby the over voltage is limited by fillers (i.e. varistor effect) and the over current is limited by polymer matrix (i.e. PTC effect). We studied the dependence of the E-J characteristics on the preparation conditions of filler material, the filler content in the polymeric matrix and suggest possible nonlinear electrical-thermal switching mechanism. |
本系統中英文摘要資訊取自各篇刊載內容。