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(CuO, Fe2O3)摻雜Ag/SnO2電接觸材料的物理性能
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1.浙江工業(yè)大學(xué)材料科學(xué)與工程學(xué)院;2.溫州宏豐電工合金股份有限公司;3.浙江大學(xué)材料科學(xué)與工程學(xué)院

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浙江省重點(diǎn)研發(fā)計(jì)劃資助項(xiàng)目(熱熔斷器專用Ag/CuO/NiO電接觸材料制備關(guān)鍵技術(shù)及產(chǎn)業(yè)化, 2018C01127)


Physical Properties of Ag/SnO2 Electrical Contacts Materials with Co-doping of CuO and Fe2O3
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College of Materials Science and Engineering, Zhejiang University of Technology

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    摘要:

    以CuO、Fe2O3為摻雜劑,采用機(jī)械合金化方法結(jié)合冷壓-燒結(jié)-熱壓工藝制備(CuO, Fe2O3)摻雜Ag/SnO2電接觸材料。利用 X 射線衍射儀(XRD)、掃描電鏡(SEM)、透射電鏡(TEM)、金屬電阻率儀、熱導(dǎo)率儀和霍爾效應(yīng)測(cè)量?jī)x等分析了不同摻雜比例Ag/SnO2電接觸材料的微觀結(jié)構(gòu)和物理性能。結(jié)果表明:熱壓可顯著改善電接觸材料中SnO2顆粒與Ag基體的界面結(jié)合;CuO和Fe2O3單一摻雜可分別提高Ag/SnO2電接觸材料的導(dǎo)電性能和導(dǎo)熱性能,而復(fù)合摻雜的Ag-11.5SnO2-0.3CuO-0.2Fe2O3電接觸材料的導(dǎo)電導(dǎo)熱性能最佳,其電阻率為2.25 μΩ·cm,硬度為74.8HV0.5,在室溫下的熱擴(kuò)散系數(shù)和熱導(dǎo)率分別為111.4 mm2/s和338.6 W/(m·K)。復(fù)合摻雜的SnO2增強(qiáng)相對(duì)Ag基體的平均潤(rùn)濕角為62.7°,界面潤(rùn)濕效果好;SnO2與Ag晶粒之間界面結(jié)合良好,SnO2(200)晶面與Ag(111)晶面的界面晶格錯(cuò)配度為14.25%。

    Abstract:

    MeO-doped Ag/SnO2 electrical contact materials were prepared by mechanical alloying combined with cold pressing-sintering-hot pressing process with CuO and Fe2O3 as dopants. Microstructure and physical properities of the electrical contact materials with different dopant contents were characterized by means of X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), metal conductivity tester, thermal conductivity meter and Hall Effect tester. The results showed that, the use of hot pressing process could significantly enhance the bonding strength between SnO2 particles and Ag matrix. Meanwhile, the single doping of CuO and Fe2O3 could improve the electrical performance and thermal conductivity of the MeO-doped Ag/SnO2 electrical contact material, respectively. When a co-doping of CuO and Fe2O3 was used, the Ag-11.5SnO2-0.3CuO-0.2Fe2O3 material presented the optimal electrical and thermal conductivity with electrical resistivity of 2.25μΩ·cm, hardness of 74.8 HV0.5, thermal diffusion coefficient of 111.4 mm2/s and thermal conductivity of 338.6 W/(m.K) at room temperature. A smaller wetting angle of 62.7° between Ag droplets and the (CuO,Fe2O3)-doped SnO2 powders was observed, indicating a better wettability, and the interfaces between SnO2 and Ag grains were well-combined with a lattice mismatch of 14.25% between SnO2 (200) and Ag (111).

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鄭曉華,吳君臣,王貴蔥,吳新合,沈濤,祁更新,楊芳兒.(CuO, Fe2O3)摻雜Ag/SnO2電接觸材料的物理性能[J].稀有金屬材料與工程,2020,49(7):2494~2500.[zheng xiao hua, wu jun chen, wang gui cong, wu xin he, shen tao, qi geng xin, yang fang er. Physical Properties of Ag/SnO2 Electrical Contacts Materials with Co-doping of CuO and Fe2O3[J]. Rare Metal Materials and Engineering,2020,49(7):2494~2500.]
DOI:10.12442/j. issn.1002-185X.20190527

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  • 收稿日期:2019-06-23
  • 最后修改日期:2019-10-01
  • 錄用日期:2019-10-11
  • 在線發(fā)布日期: 2020-08-31
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