Mn_(0.43)Ni_(0.9)CuFe_(0.67)O_4 NTC热敏材料的Pechini法制备及微波烧结特性研究
Preparation and Microwave Sinterability of Mn_(0.43)Ni_(0.9)CuFe_(0.67)O_4 NTC Thermistor Materials by Pechini Method
查看参考文献22篇
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文摘
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为制备材料常数(B值)1900K左右宽温区NTC热敏电阻,将Pechini方法制备的Mn_(0.43)Ni_(0.9)CuFe_(0.67)O_4粉体置于2.45GHz多模腔微波炉中,经不同温度下微波煅烧压制成型后,于1000℃下微波烧结.采用红外(FT-IR),X射线衍射(XRD),扫描电镜(SEM),粒度分析分别对样品的晶体结构、相组成、形貌和粒度分布进行了表征.结果表明,不同煅烧和烧结工艺对元件的电学性能有很大的影响;微波最佳煅烧温度为650℃,比常规煅烧所需温度低;微波烧结能够获得微观结构均匀致密的陶瓷体;微波烧结制得元件的B值和电阻率均匀性较好,其B值平均值为1930K,偏差为0.31%,电阻率ρ的平均值为135Ω·cm,偏差为4.55%;而常规烧结制得元件的B值平均值为1720K,偏差为1.47%,电阻率ρ的平均值为78Ω·cm,偏差为25.34%.复阻抗分析表明,微波烧结后样品的晶粒电阻Rb和晶界电阻Rgb分别为255和305Ω,而常规烧结样品的晶粒和晶界电阻分别为200和230Ω. |
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其他语种文摘
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In order to obtain the NTC thermistors with small B constant (about 1900K), applied to wide temperature range, Mn_(0.43)Ni_(0.9)CuFe_(0.67)O_4 NTC thermistor materials prepared by Pechini method were microwave-calcined at different temperatures (650℃, 750℃ and 850℃). The calcined Mn_(0.43) Ni_(0.9) CuFe_(0.67) O_4 powders were pressed and then sintered at 1000℃ in a microwave furnace (multimode cavity, 2.45 GHz). The crystal structure, phase compositions, morphology and particle size distribution of the samples were analyzed by FT-IR, X-ray diffraction (XRD), scanning electron microscope (SEM) and a laser particle size analyzer. The experimental results show that the electrical properties of the ceramics are strongly dependent on the calcination and sintering process. The application of microwave leads to a lower calcination temperature (650℃) and densified uniform microstructures. Microwave sintering can obtain the components with well uniformity of B constant and resistivity, of which the B_(avg) is 1930K (deviation of 0.31%) and resistivity ρ_(avg) is 135Ω · cm (deviation of 4.55%). However, the B_(avg) is 1720K (deviation of 1.47%) and resistivity ρ_(avg) is 78Ω · cm (deviation of 25.34%) for the conventionally sintered components. From complex impedance analysis, the grain resistance (R_b) and grain boundary resistance (R_(gb)) are respectively 255Ω and 305 Ω for the microwave-sintered samples. The R_b and R_(gb) are respectively 200Ω and 230Ω for conventionally sintered samples. |
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来源
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无机材料学报
,2009,24(5):1013-1018 【核心库】
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DOI
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10.3724/sp.j.1077.2009.01013
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关键词
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微波烧结
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微波煅烧
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NTC
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Pechini法
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地址
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中国科学院,新疆理化技术研究所, 新疆, 乌鲁木齐, 830011
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-324X |
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学科
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一般工业技术 |
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基金
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新疆乌鲁木齐市科技局科技攻关项目
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乌鲁木齐市种子基金
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文献收藏号
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CSCD:3696153
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参考文献 共
22
共2页
|
|
1.
Wang Shao-Gang.
Materials Chemistry and Physics,2008,110(1):83-88
|
被引
3
次
|
|
|
|
|
2.
Menezes R R.
Journal of Materials Processing Technology,2008,203(3):513-517
|
被引
8
次
|
|
|
|
|
3.
孟庆新. 机械合金化和放电等离子烧结制备Y_13Al_5O_(12)陶瓷.
功能材料与器件学报,2008,14(3):591-596
|
被引
1
次
|
|
|
|
|
4.
金钦汉.
微波化学,1999:94-96
|
被引
12
次
|
|
|
|
|
5.
Mohamed Aliouat.
Journal of the American Ceramic Society,1990,73(8):2515-2518
|
被引
1
次
|
|
|
|
|
6.
Selmi F.
Materials Letters,1992,12(6):424-428
|
被引
1
次
|
|
|
|
|
7.
Mark I Jones.
Journal of the American Ceramic Society,2001,84(10):2424-2426
|
被引
2
次
|
|
|
|
|
8.
Huang Z J.
Journal of Materials Processing Technology,2009,209(5):2446-2452
|
被引
2
次
|
|
|
|
|
9.
Kristen H Brosnan.
Journal of the American Ceramic Society,2003,86(8):1307-1312
|
被引
9
次
|
|
|
|
|
10.
Ebadzadeh T.
Journal of Alloys and Compounds,2008,448(2):246-249
|
被引
4
次
|
|
|
|
|
11.
常爱民. 氧化物电子陶瓷微波烧结用保温材料MgAl_2O_4-LaCrO_3的研究.
无机材料学报,2002,17(4):713-718
|
被引
3
次
|
|
|
|
|
12.
Romualdo R Menezes.
Journal of Materials Processing Technology,2007,190(2):223-229
|
被引
13
次
|
|
|
|
|
13.
金钦汉.
微波化学,1999:17-18
|
被引
9
次
|
|
|
|
|
14.
聂荣佳.
铁酸盐的制备及用于两步热化学循环分解水制氢的初步研究[硕士论文],2003
|
被引
1
次
|
|
|
|
|
15.
Roy R.
MATERIALS RESEARCH INNOVATIONS,2002,6(3):128-140
|
被引
3
次
|
|
|
|
|
16.
Vaidhyanathan B.
Journal of the American Ceramic Society,2001,84(6):1197-1202
|
被引
3
次
|
|
|
|
|
17.
莫以豪.
半导体陶瓷及敏感元件,1983:182-188
|
被引
1
次
|
|
|
|
|
18.
Wang J.
Journal of the American Ceramic Society,2006,89(6):1977-1984
|
被引
2
次
|
|
|
|
|
19.
Song S G.
Materials Research Bulletin,2005,40(7):1081-1093
|
被引
3
次
|
|
|
|
|
20.
苏树兵. CoMnCuO系NTC热敏电阻的复阻抗分析.
材料科学与工程,2002,20(3):386-389
|
被引
5
次
|
|
|
|
|
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