| 程控电话交换机过电流保护元件用高性能PTC陶瓷的研制 |
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| 引用本文： | 黄仲臧. 程控电话交换机过电流保护元件用高性能PTC陶瓷的研制[J]. 电子元件与材料, 1995, 14(3): 28-32 |
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| 作者姓名： | 黄仲臧 |
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| 作者单位： | 中国科学院上海硅酸盐研究所 |
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| 摘 要： | 阐述了高性能ＰＴＣ陶瓷材料制备的基本要点，并以基方固溶体化学组成、原材料选择、复合添加物改性以及特定烧结工艺等方面开展工作，制得了居里温度为９０℃左右、室温体积电阻率为３０Ω·ｃｍ，电阻率突变ρνｍａｘ／ρνｍｉｎ＞１０５、电阻率温度系数α≈１５％／℃、耐电压强度≥１５０Ｖ／ｍｍ的高性能ＰＴＣ陶瓷材料。此材料制得的元件能满足程控电话交换机过电流保护的要求。
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| 关 键 词： | 高性能PTC陶瓷，烧结添加物，扩散相变，程控电话交换机，过电流保护 |
Preparation of High-quality PTC Ceramics for Overcurrent Protection Components in Programme-controlled Exchange |
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| Huang Zhongzang. Preparation of High-quality PTC Ceramics for Overcurrent Protection Components in Programme-controlled Exchange[J]. Electronic Components & Materials, 1995, 14(3): 28-32 |
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| Authors: | Huang Zhongzang |
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| Affiliation: | Huang Zhongzang |
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| Abstract: | Basic points in preparation of high-quality PTC ceramics are indicated. Aspects of chemical composition of it's basic solution, selection of raw materials, composite additive modification, specific firing process and the others are researched.High-quality ceramics with Curie temperature about 90℃, room temperature volume resistivity 30 ohm·cm,resistivity step ratio ρνmax/ρν min>105,temperature coefficient of resistivity α≈15%℃(-1), dielectric strength≥150V/mm has been made.Components made of this material can meet requirements of overcurrent protection in programme-controlled |
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| Keywords: | high-quality PTC ceramics additive for firing phase change by diffusion overcurrent protection in programme-controlled exchange. |
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