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首页> 外文期刊>Journal of materials science >Microstructure and dielectric properties of glass/Al_2O_3 composites with various low softening point borosilicate glasses
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Microstructure and dielectric properties of glass/Al_2O_3 composites with various low softening point borosilicate glasses

机译:各种低软化点硼硅酸盐玻璃/ Al_2O_3复合材料的微观结构和介电性能

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摘要

The effects of various low softening point borosilicate glasses on both the sintering behavior and dielectric properties of glass/Al_2O_3 composites were investigated by FTIR, DSC, XRD, SEM and EDS. Results show that the addition of alkali oxides and PbO can decrease the glass softening temperature. While, the addition of Al_2O_3 and more SiO_2 content in the glass can increase the continuity of glass network and further increase the glass softening temperature of samples. Glass with lower softening temperature has more time to flow to finish the densification of samples, and that can contribute to get better sintered composites. By contrast, CaO-PbO-B_2O_3-SiO_2-Na_2O-K_2O glass/Al_2O_3 composites sintered at 875 ℃ for 15 min exhibit better properties of a bulk density of 3.06 g/cm~3, a porosity of 0.17 %, a λ value of 2.47 W/m K, a ε_r value of 8.05 and a tan δ value of 8.8 × 10~(-4) at 10 MHz.
机译:通过FTIR,DSC,XRD,SEM和EDS研究了各种低软化点硼硅酸盐玻璃对玻璃/ Al_2O_3复合材料烧结性能和介电性能的影响。结果表明,添加碱金属氧化物和PbO可以降低玻璃的软化温度。同时,在玻璃中添加Al_2O_3和增加SiO_2的含量可以增加玻璃网络的连续性,并进一步提高样品的玻璃软化温度。软化温度较低的玻璃有更多的时间流动以完成样品的致密化,这有助于获得更好的烧结复合材料。相比之下,CaO-PbO-B_2O_3-SiO_2-Na_2O-K_2O玻璃/ Al_2O_3复合材料在875℃下烧结15min表现出更好的性能,堆积密度为3.06 g / cm〜3,孔隙率为0.17%,λ值为在10 MHz下,ε_r值为8.05 W / m K,tanδ值为8.8×10〜(-4)。

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  • 来源
    《Journal of materials science》 |2012年第12期|2130-2139|共10页
  • 作者单位

    College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China;

    College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China,State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering,Nanjing University of Technology, Nanjing 210009, China;

    College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China;

    State Key Laboratory of New Ceramic and Fine Processing,Tsinghua University, Beijing 100084, China;

    College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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