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| 1 | Effect of SrO Content on Structure,Thermal Properties and Chemical Stability of Bi2O3-B2O3-ZnO-SrO Low-melting Glass for Si-Al Alloy Package显示文摘The 40Bi2O3-30B2O3-(30-x)ZnO-xSrO (x=0-15mol%,BBZSr) glass system was prepared by the conventional melt quenching method.The effect of SrO addition on structure,thermal properties,chemical stability and sealing performance of BBZSr glass were investigated thoroughly.The experimental results show that the total proportions of [BO3] group and [BO4] group decrease and the vibrations of [BiO3] group and [BiO6] group become weaker with the increase of SrO addition content,suggesting the glass network structure is strengthened owing to the SrO addition.Hence,both the thermal and chemical stability were significantly improved as the SrO content was increased.When the SrO content increased from 0 to 15mol%,the glass transition temperature and softening temperature slightly increased from 380 to 388 ℃ and from 392.7 to 402.2 ℃,respectively,meanwhile the coefficient of thermal expansion also increased from 10.49×10^-6 to 11.16×10^-6/℃ (30-300 ℃).The BBZSr glass with 15mol% SrO exhibited excellent comprehensive properties with low glass transition temperature(384.9 ℃),low softening temperature(400.3 ℃),high coefficient of thermal expansion (11.14×10^-6 ℃,30-300 ℃),good thermal and chemical stability.Besides,the glass had the good wetting behavior and sealing performance for Al-50%Si alloy. | WU Zhilun ZHANG Ming ZHANG Chunyan MENG Fancheng LIN Huixing | 2020 | Journal of Wuhan University of Technology(Materials Science)2020，35，2： | 2 |
| 2 | Study on properties of ultra-low dielectric loss mPPO/MTCLT composites prepared by injection molding显示文摘A novel category of polyphenylene oxide/high-impact polystyrene(PPO/HIPS)alloy was used as the polymer matrix(abbreviated as mPPO)and loaded with different volume fractions(0,10,20,30,40,50 vol.%)of MgTiO_(3)-Ca_(0.7)La_(0.2)TiO_(3)(abbreviated as MTCLT)ceramics to prepare composites by injection molding.Its micromorphology,density,dielectric,thermal and mechanical properties were analyzed in detail.The experimental results show that the composites possess a compact microstructure because HIPS increases the fluidity of PPO.Due to the excellent dielectric properties of both mPPO and MTCLT,the composites have an extremely low dielectric loss.The realization of the high ceramic filler fraction greatly limits the thermal expansion of the polymer chain by introducing the interphase,so that the coefficient of thermal expansion of the composite material could be as low as 21.8 ppm/°C.At the same time,the presence of ceramic particles could reinforce the mechanical property of the compos-ites.When the ceramic filler fraction is higher than 20 vol.%,the bending strength of the composite material is around 110 MPa.When the ceramic filler fraction is 40 vol.%,the composite possesses the best comprehensive performance.The dielectric constant is 6.81,the dielectric loss is 0.00104,the thermal expansion coefficient is as low as 25.3 ppm/°C,and the bending strength is 110.4 MPa.Due to its excellent properties,this material can be a good candidate in the field of microwave communication. | Yahan Liu Haiyi Peng Xiaogang Yao Minmin Mao Kaixin Song Huixing Lin | 2022 | Journal of Advanced Dielectrics2022，12，3： | 1 |
| 3 | Effects of Al 2 O 3 addition on the microstructure and microwave dielectric properties of Ba 4 Nd 9.33 Ti 18 O 54 ceramics显示文摘 | Xiaogang Yao Huixing Lin Xiangyu Zhao Wei Chen Lan Luo | 2012 | Ceramics International2012，，： | 1 |
| 4 | Sintering Behavior and Microwave Dielectric Properties of BBSZL Glass-doped ZnTiO_3 Ceramics for LTCC Applications显示文摘A novel low temperature co-fired ceramic(LTCC) material was fabricated by zinc titanate(ZnTiO_3) ceramics doped with B_2O_3-BaO-SiO_2-ZnO-Li_2O(BBSZL) glass. The influences of BBSZL glass on wetting behavior, sintering activation energy, phase composition, microstructure and microwave dielectric properties were investigated. The experimental results show that the sintering temperature of ZnTiO3 ceramics can be reduced from 1 100 to 925 ℃, meanwhile the sintering activation energy is decreased from 465.32 to 390.54 kJ·mol^(-1) by BBSZL glass aid, respectively. Moreover, BBSZL glass can inhibit the high Q×f ZnTiO_3 phase decompose into the low Q×f value Zn_2TiO_4 phase, which is propitious to obtain high Q×f value LTCC material. The ZnTiO_3-BBSZL composite sintered at 925℃ displays the excellent microwave dielectric properties with ε_r of 21.8, Q×f value of 42000 GHz, and τ_f of-75 ppm·℃^(-1). | 周楚同 YANG Jianyu LIN Huixing ZHANG Fan 任琳 | 2019 | Journal of Wuhan University of Technology(Materials Science)2019，34，2： | 1 |
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