Search results for: Guozhu Shen

Items from 1 to 8 out of 8 results

article

Impact of Fe deposition on microwave absorption properties of ordered mesoporous carbon flakes

Guozhu Shen, Buqing Mei, Hongyan Wu, Bin Zhao, more

Journal of Materials Science: Materials in Electronics > 2019 > 30 > 16 > 15321- 15330

Lightweight ordered mesoporous carbon (OMC) flakes have been successfully synthesized by an evaporation-induced self-assembly route. The highest specific surface area and pore volume of the OMC flakes reach 1727 m² g⁻¹ and 2.05 cm³ g⁻¹, respectively. The results of the complex permittivity show the OMC/paraffin composites have high dielectric loss in the frequency range of 2–18 GHz. In order to enhance...

article

Magnetic hollow mesoporous carbon composites with impedance matching for highly effective microwave absorption

Guozhu Shen, Junzhao Ren, Bin Zhao, Buqing Mei, more

Journal of Materials Science > 2019 > 54 > 5 > 4024-4037

Lightweight hollow mesoporous carbon spheres (HMCSs) with large air/carbon interface in the mesoporous shell and interior void have been successfully synthesized via a ‘polymerization–pyrolysis–etching’ route. The complex permittivity of the HMCSs can be easily adjusted by carbonization temperature in the frequency range of 2–18 GHz, which is in favor of designing absorbers in different frequency...

article

Microwave electromagnetic and absorption properties of SiO₂/C core/shell composites plated with metal cobalt

Guozhu Shen, Xumin Fang, Hongyan Wu, Hongyu Wei, more

Applied Physics A > 2017 > 123 > 4 > 1-10

A facile method has been developed to fabricate magnetic core/shell SiO₂/C/Co sub-microspheres via the pyrolysis of SiO₂/PANI (polyaniline) and electroless plating method. The electromagnetic parameters of these SiO₂/C and SiO₂/C/Co composites were measured and the microwave reflection loss properties were evaluated in the frequency range of 2–18 GHz. The results show that the dielectric loss of SiO...

article

Enhanced microwave absorption properties of N-doped ordered mesoporous carbon plated with metal Co

Guozhu Shen, Yewen Xu, Bin Liu, Peng Du, more

Journal of Alloys and Compounds > 2016 > 680 > C > 553-559

We demonstrate an excellent performance of nitrogen-doped ordered mesoporous carbon (NOMC) plated with metal cobalt for microwave absorption in the frequency range of 2–18 GHz. Spherical NOMC particles with a cubic Im3(_)m symmetry are synthesized by organic-organic self-assembly of triblock copolymer, 3-aminophenol and hexamethylenetetramine (HMTA) in basic aqueous solution. The prepared NOMC particles...

article

Preparation and electromagnetic properties of zinc ferrite/expanded graphite composites

Guozhu Shen, Songtao Yu, Yuan Cao

Materials Science-Poland > 2014 > 32 > 3 > 470-474

An effective process for the synthesis of nano spinel zinc ferrite/expanded graphite composites was developed in order to get an electromagnetic interference shielding material. Firstly, expandable graphite was prepared using sulfuric and nitric acid solutions. Then, the precursor of the composites was produced by chemical co-precipitation method, followed by heating treatment. The obtained composites...

article

Structure and dynamics of natural populations of the endangered plant Euryodendron excelsum H. T. Chang

Shikang Shen, Haiying Ma, Yuehua Wang, Boyi Wang, more

Frontiers of Forestry in China > 2009 > 4 > 1 > 14-20

Euryodendron excelsum H. T. Chang is an endangered species of the family Theaceae endemic to China. It is listed as a second-class endangered plant for state protection in the Red Data Book of Plants in the People’s Republic of China. The species is restricted to one remnant population with less than 200 individuals in the Bajia region of Yangchun County, Guangdong Province. This study was conducted...

article

Double-layer microwave absorber based on ferrite and short carbon fiber composites

Guozhu Shen, Ming Xu, Zheng Xu

Materials Chemistry and Physics > 2007 > 105 > 2-3 > 268-272

Sol–gel method was used to prepare M-type BaFe ₁₂ O ₁₉ and W-type BaCo ₂ Fe ₁₆ O ₂₇ hexaferrites. Electromagnetic parameters of the ferrites composites and M-type ferrite composite filled with short carbon fiber were measured at Ku waveband, and their reflectivity was calculated according to transmission-line theory, respectively. Based on the above calculation,...

article

Absorbing properties and structural design of microwave absorbers based on W-type La-doped ferrite and carbon fiber composites

Guozhu Shen, Zheng Xu, Yi Li

Journal of Magnetism and Magnetic Materials > 2006 > 301 > 2 > 325-330

Sol–gel method was used to prepare W-type BaCo ₂ Fe ₁₆ O ₂₇ hexaferrite and La-doped Ba _0.7 La _0.3 Co ₂ Fe ₁₆ O ₂₇ hexaferrite. Electromagnetic parameters of the ferrites and short carbon fiber composites were measured, and reflectivity was calculated according to transmission-line theory in the range 12.4–18GHz. The results show that...

Filter options

Publication date

Set your own date range

INFONA - science communication portal

Search results for: Guozhu Shen

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options