BaO含量对K_2O-B_2O_3-SiO_2-Al_2O_3低温烧结材料性能的影响
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摘要
在不添加熔融玻璃的情况下,采用一次预烧法制备了低温烧结的K_2O-B_2O_3-SiO_2-Al_2O_3复合材料,并系统地讨论了BaO含量对复合材料微观结构、物相组成、介电性能、弯曲强度和热膨胀系数的影响。X射线衍射结果表明复合材料的主晶相为石英相,次晶相为氧化铝相。除此之外,研究结果表明调整BaO含量有利于获得良好的烧结性能。当BaO质量分数为5%时,在850℃烧结的复合材料在14 GHz下的相对介电常数(ε_r)为5.42,介电损耗为3.6×10~(-3),热膨胀系数(TEC)为8.4×10~(-6)/℃,弯曲强度为158 MPa。这为制备新型的LTCC材料提供了一种有效的方法,具有广阔的应用前景。
Without the addition of glass materials,K_2O-B_2O_3-SiO_2-Al_2O_3 composites were sintered at temperature less than 900 ℃ by a novel and effective pre-sintering method.Meanwhile,the effects of the BaO content on the microstructure,phase and dielectric properties of the composites were discussed systematically.The X-ray diffraction(XRD) show that the main crystalline phase is SiO_(2 )and the secondary phase is Al_2O_3.In addition,the measured results reveal that the adjustment of BaO content leads to the improvement of the sintering properties.As BaO content increases to 5%,the composite sintered at 850 ℃ has a dielectric constant of 5.42 and tanδ of 3.6 × 10~(-3) at 14 GHz,thermal expansion coefficient(TEC) of 8.4×10~(-6)/℃,and flexural strength of 158 MPa.This work provides an effective approach for preparing the novel composites as a promising candidate for LTCC applications.
Without the addition of glass materials,K_2O-B_2O_3-SiO_2-Al_2O_3 composites were sintered at temperature less than 900 ℃ by a novel and effective pre-sintering method.Meanwhile,the effects of the BaO content on the microstructure,phase and dielectric properties of the composites were discussed systematically.The X-ray diffraction(XRD) show that the main crystalline phase is SiO_(2 )and the secondary phase is Al_2O_3.In addition,the measured results reveal that the adjustment of BaO content leads to the improvement of the sintering properties.As BaO content increases to 5%,the composite sintered at 850 ℃ has a dielectric constant of 5.42 and tanδ of 3.6 × 10~(-3) at 14 GHz,thermal expansion coefficient(TEC) of 8.4×10~(-6)/℃,and flexural strength of 158 MPa.This work provides an effective approach for preparing the novel composites as a promising candidate for LTCC applications.
引文
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[6]Luo X,Ren L,Xie W,et al.Microstructure,sintering and properties of CaO-Al2O3-B2O3-SiO2 glass/Al2O3 composites with different CaO contents[J].Journal of Materials Science:Materials in Electronics,2016,27 (5):5446-5451.
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[11]Hu Y,Tsai H T.The effect of BaO on the crystallization behaviour of a cordierite-type glass [J].Materials Chemistry and Physics,1998,52(2):184-188.
[12]Chen G H.Sintering,crystallization,and properties of CaO doped cordierite-based glass-ceramics[J].Journal of Alloys and Compounds,2008,455(2):302.
[2]Jantunen H,Rautioaho R,Uusimaki A.Preparing low-loss low-temperature cofired ceramic material without glass addition[J].Journal of the American Ceramic Society,2000,83(11):2855-2857.
[3]Cui X,Zhou J.A simple and an effective method for the fabrication of densified glass-ceramics of low temperature co-fired ceramics[J].Materials Research Bulletin,2008,43(6):1590-1597.
[4]田英良,孙诗兵.新编玻璃工艺学[M].北京:中国轻工业出版社,2016.
[5]Lim E S,Kim B S,Lee J H,et al.Effect of BaO content on the sintering and physical properties of BaO-B2O3-SiO2 glasses[J].Journal of Non-Crystalline Solids,2006,352(8):826.
[6]Luo X,Ren L,Xie W,et al.Microstructure,sintering and properties of CaO-Al2O3-B2O3-SiO2 glass/Al2O3 composites with different CaO contents[J].Journal of Materials Science:Materials in Electronics,2016,27 (5):5446-5451.
[7]Induja I J,Surendran K P,Varma M R,et al.Low,low loss alumina-glass composite with low CTE for LTCC microelectronic applications[J].Ceramics International,2017,43(1):736-740.
[8]George S,Sebastian M T,Raman S,et al.Novel low loss,low permittivity glass-ceramic composites for LTCC applications[J].International Journal of Applied Ceramic Technology,2011,8(1):172-179.
[9]Shannon R D.Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides[J].Acta Crystallographica,2015,32(2):751-767.
[10]Nataliya T.Inorganic chemistry in tables springer inorganic chemistry in tables [M].London:Springer,2011.
[11]Hu Y,Tsai H T.The effect of BaO on the crystallization behaviour of a cordierite-type glass [J].Materials Chemistry and Physics,1998,52(2):184-188.
[12]Chen G H.Sintering,crystallization,and properties of CaO doped cordierite-based glass-ceramics[J].Journal of Alloys and Compounds,2008,455(2):302.