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| 1 | Effect of Heat Treatment on the Microwave Electromagnetic Properties of Carbonyl Iron/Epoxy-Silicone Resin Coatings显示文摘Microwave absorbing properties of the carbonyl iron particles filled epoxy-silicone resin coatings showed visible degression when the coatings were heat treated at 300 ℃ with different time.The complex permittivity and permeability of the coatings before and after heat treatment were measured.After heat treatment at 300 ℃,the real part of permittivity of the coatings increased with increasing treatment time and showed frequency dependence dielectric response.The complex permeability showed remarkable variation while the resonance frequency of the coatings heat treated at 300 ℃ shifted from 7 to 12 GHz.The electromagnetic results indicated that microwave absorbing properties of the coatings showed more dependent on the complex permeability.The results showed that the difference of the electromagnetic and microwave absorbing properties before and after heat treatment was mainly attributed to the crystalline state transition of carbonyl iron particles. | Yuchang Qing,Wancheng Zhou,Shu Jia,Fa Luo and Dongmei Zhu State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi an 710072,China | 2010 | Journal of Materials Science & Technology2010，26，11： | 6 |
| 2 | Microwave electromagnetic properties of carbonyl iron particles and Si/C/N nano-powder filled epoxy-silicone coating显示文摘 | Yuchang Qing Wancheng Zhou Fa Luo Dongmei Zhu | 2009 | Physica B: Physics of Condensed Matter2009，，4： | 1 |
| 3 | Microwave electromagnetic property of SiO 2 -coated carbonyl iron particles with higher oxidation resistance显示文摘 | Qing Yuchang Zhou Wancheng Jia Shu Luo Fa Zhu Dongmei | 2010 | Physica B: Physics of Condensed Matter2010，，4： | 1 |
| 4 | Microwave-absorbing and mechanical properties of carbonyl-iron/epoxy-silicone resin coatings显示文摘 | Yuchang Qing Wancheng Zhou Fa Luo Dongmei Zhu | 2008 | Journal of Magnetism and Magnetic Materials2008，，1： | 1 |
| 5 | Effect of aluminium on precipitation hardening in Cu-Ni-Zn al loy显示文摘 | Zhou Xiaozhong Su Yuchang Sun Jinming | 2001 | Joumal of Materials Science2001，45，11： | 1 |
| 6 | Study on the electrochemical performance of the Cu-30Ni and Cu-20Zn-10Ni alloys 显示文摘 | Zhou Xiaozhong Deng Chuping Su Yuchang | 2010 | Journal of Alloys and Compounds2010，491，12： | 1 |
| 7 | Effect of aluminium on precipitation hardening in Cu-Ni-Zn alloy 显示文摘 | Zhou Xiaozhong Su Yuchang Sun Jinming | 2001 | Journal of Materials Science2001，45，11： | 1 |
| 8 | ,Microwave absorbingand mechanical properties of carbonyl-iron/epoxy-silicone resincoatings显示文摘 | Yuchang Qing Wancheng Zhou Fa Luo | 2009 | Journal of Magnetism and Magnetic Materials2009，321，1： | 1 |
| 9 | A novel Cu-Ni-Zn-AI alloy with high strength through precipitation hardening显示文摘 | Zhou Xiaozhong Su Yuchang | 2010 | Materials Science and Engineering2010，，4： | 1 |
| 10 | Dielectric properties of carbon black and carbonyl iron filled epoxy-silicone resin coating显示文摘 | Qing Yuchang Zhou Wansheng Jia Shu | 2010 | Journal of Materials Science2010，45，7： | 1 |
| 11 | Microwave-absorbing and mechanical properties of carbonyl-iron/epoxy-silicone resin coatings显示文摘 | Qing Yuchang Zhou Wancheng Luo Fa | 2009 | Journal of Magnetism and Magnetic Materials2009，321，1： | 1 |
| 12 | Dielectric Properties of SiC_f/PyC/SiC Composites After Oxidation显示文摘In this paper,the SiC fiber-reinforced SiC matrix composites with a 0.15μm thick pyrocarbon interphase(noted as SiC/PyC/SiC) were prepared by chemical vapor infiltration(CVI).The SiCf/PyC/SiC were oxidized in air at950 'C for 50 h.The dielectric properties after this high temperature oxidation were investigated in X-band from room temperature(RT) to 700℃.Results suggested that:ε′ of the SiC_f/PyC/SiC after oxidation increased at first then decreased with temperature elevating;ε″ increased with temperature raising in the temperature range studied. | SONG Huihui ZHOU Wancheng LUO Fa QING Yuchang CHEN Malin LI Zhimin | 2016 | Journal of the Chinese Ceramic Society2016，，2： | 0 |
| 13 | The Effects of Diabetes and Hypertension on the Severity of COVID-19- Yichang, Hubei Province, 2020显示文摘Summary What is already known on this topic?COVID-19 has become a serious public health issue.A higher proportion of severe patients were senior patients with underlying diseases such as diabetes and hypertension and had a lack of statistical evidence so far.What is added by this report?When severe illness was compared with non-severe illness,senior patients were at a greater risk(4.71)than young and middle-aged patients,as well as the odds ratio was about 2.99 patients with diabetes compared to patients without diabetes and hypertension.COVID-19-infectious senior patients with diabetes were inclined to suffer severe illness. | Yuchang Zhou Jiajuan Yang Chengzhong Xu Chi Hu Fangfang Lu Fuzhong Xue Pei Zhang | 2020 | China CDC weekly2020，2，43： | 0 |
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