Low temperature synthesis and characterization of NTC powder and its 'lead free' thick film thermistors

被引：19
|
作者：
Jagtap, Shweta [1 ,2 ]
Rane, Sunit [1 ]
Gosavi, Suresh [3 ]
Amalnerkar, Dinesh [1 ]
机构：
[1] Ctr Mat Elect Technol, Thick Film Mat Lab, Pune 411008, Maharashtra, India
[2] Univ Pune, Dept Elect Sci, Pune 411008, Maharashtra, India
[3] Univ Pune, Dept Phys, Pune 411007, Maharashtra, India
来源：
MICROELECTRONIC ENGINEERING | 2010年 / 87卷 / 02期
关键词：
Powders; Synthesis; Spinels; Thermistors; Thick film; ELECTRICAL-PROPERTIES; SPINEL STRUCTURE; CERAMICS; NI; CO;
D O I：
10.1016/j.mee.2009.05.026
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A general and simple chemical approach has been proposed to prepare negative temperature coefficient (NTC) powder material using commercially available tetra hydrated acetates of Mn, Co, Ni and oxalic acid. The thermal decomposition of Mn-Co-Ni oxalate at 700 degrees C leads to formation of spinel phases with fine powder material. Lead free thick film thermistor pastes were formulated using the synthesized spinel powders. planar thick film thermistor patterns of the formulated pastes were screen printed on alumina substrates. The microstructure and electrical properties of these thick film thermistors were determined. Depending on the powder preparation, the prepared thick film NTC thermistors showed room temperature resistance in the range of 12-29 M Omega. The values of thermistor constant, beta(25/300) ranged from 4014 to 4223 K. (C) 2009 Elsevier B.V. All rights reserved,
引用
收藏
页码：104 / 107
页数：4
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