Zobrazeno 1 - 10
of 215
pro vyhledávání: '"Tsun-Hsu Chang"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-10 (2024)
Abstract This study introduces a novel microwave applicator and optimized processing conditions to enhance the stability of Polyacrylonitrile (PAN)-based precursor fiber (PF). The innovative microwave applicator facilitates the propagation of the ele
Externí odkaz:
https://doaj.org/article/762fcbfc54444bf2b97bceb1011b5d3c
Publikováno v:
Polymers, Vol 15, Iss 18, p 3751 (2023)
This study focuses on the measurement and analysis of the complex permittivities of polymer blends using the field enhancement method (FEM). The blends, consisting of air-powder or solvent–solute mixtures, are placed in a Teflon holder and inserted
Externí odkaz:
https://doaj.org/article/727c3435027946ed849221cb8a15f918
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
Abstract The polyacrylonitrile (PAN) fibers go through a series of chemical reactions in various processing temperatures/stages and finally turn into the so-called carbon fibers. Oxidization is the first stage, and it takes the largest proportion of
Externí odkaz:
https://doaj.org/article/efb84f64f46d43cca14606cf85df5c9f
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Abstract The epoxy/magnetite nanocomposites express superparamagnetism under a static or low-frequency electromagnetic field. At the microwave frequency, said the X-band, the nanocomposites reveal an unexpected diamagnetism. To explain the intriguing
Externí odkaz:
https://doaj.org/article/050f3220125e47a09ca0f3328147d3bc
Publikováno v:
AIP Advances, Vol 12, Iss 5, Pp 055017-055017-8 (2022)
A gyrotron traveling-wave amplifier (gyro-TWA) with a distributed-loss structure can achieve high gain over a broad bandwidth. In this study, a low-voltage, low-current subterahertz gyro-TWA with medium power (∼10 W) over a broad-frequency range (
Externí odkaz:
https://doaj.org/article/ffb3e9e297e94d23b3fc40a1fabd1988
Autor:
Ahmad Alsaad, Chris M. Marin, Nabil Alaqtash, Hsien-Wen Chao, Tsun-Hsu Chang, Chin Li Cheung, A. Ahmad, I.A. Qattan, Renat F. Sabirianov
Publikováno v:
Data in Brief, Vol 16, Iss , Pp 667-684 (2018)
The Crystallographic data of the α-DIPAB sample was measured using powder X-ray diffraction (PXRD). The crystal structure was also optimized using density functional based method. The calculations were performed both including van der Waals (vdW) in
Externí odkaz:
https://doaj.org/article/f81321f729e8435fbfb5bbabdaf488ce
Publikováno v:
Polymers, Vol 13, Iss 16, p 2658 (2021)
This work presents the measurement of the complex permittivities of high density polyethylene (HDPE), linear low density polyethylene (LLDPE), low density polyethylene (LDPE), polypropylene (PP), Nylon, and thermoplastic vulcanizates (TPV) in irregul
Externí odkaz:
https://doaj.org/article/956f610444cb46aab37e359389b7c683
Autor:
Yan-Ren Chen, Hsien-Wen Chao, Hung-Chun Hsu, Cheng-Hsuan Chan, Wei-Hsiang Lin, Che-Wei Tsai, Tsun-Hsu Chang
Publikováno v:
Polymers, Vol 13, Iss 9, p 1476 (2021)
A novel microwave annealing system and a specific processing condition are proposed for the pre-oxidation of carbon fiber. The microwave annealing system consists of a TM-mode resonant cavity and a silicon carbide (SiC) susceptor. The TM-mode cavity
Externí odkaz:
https://doaj.org/article/0b0798773751414cb7f8a1561f27195c
Publikováno v:
Polymers, Vol 13, Iss 9, p 1391 (2021)
We synthesized BaTiO3–epoxy nanocomposites (particle size < 100 nm) with volume fractions up to 25 vol. %, whose high-frequency complex permittivity was characterized from 8.2 to 12.5 GHz. The maximum dielectric constant approaches 9.499 with an ac
Externí odkaz:
https://doaj.org/article/9c149d13575740fa8075c781915ecc95
Publikováno v:
Polymers, Vol 12, Iss 9, p 1891 (2020)
We propose a compact nearfield scheme for fast and broadband dielectric characterization in the microwave region. An open-type circular probe operated in the high-purity TE01 mode was developed, showing a strongly confined fringing field at the open
Externí odkaz:
https://doaj.org/article/c1e017b378e045e7ab4f32b74a106556