Author
Shu Ang Han
Bio: Shu Ang Han is an academic researcher. The author has contributed to research in topics: Dielectric & Permittivity. The author has an hindex of 1, co-authored 1 publications receiving 19 citations.
Topics: Dielectric, Permittivity, Flexural strength
Papers
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Abstract: In this paper, 2.5D SiO2f/SiO2 composites were fabricated via sol-gel process employing 2.5D braided silica fiber fabrics as reinforcements and high pure silicasol as slurry. The process parameters are optimized and the optimal parameters are as follows: the silicasol of 30.8 wt. % as slurry, microwave drying, and sintering at 900 °C. Utilizing the optimal process parameters, the density and the flexural strength of the composites can reach 1.65 g•cm-3 and 80.68 MPa respectively. Dielectric properties of the 2.5D SiO2f/SiO2 composites were also measured, and the real part of the permittivity is 3.40 at 5 GHz. The excellent mechanical and dielectric properties of the 2.5D SiO2f/SiO2 composites can well meet the requirements of radome materials.
21 citations
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TL;DR: In this paper, the fracture toughness of 3D orthogonal quartz fiber reinforced silica composites has been enhanced by a wide margin using digital camera and scanning electron microscopy.
36 citations
TL;DR: SiO 2 /ZrO 2 -SiO2 composites were fabricated by the sol-gel process, and their high-temperature flexural properties were explored.
31 citations
TL;DR: In this article, the fracture behavior of SiO2f/SiO2 composites under higher temperature was investigated and the results showed that the fracture mechanism was a combination of brittle and ductile fracture.
27 citations
15 Jan 2012-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effect of two different fiber architectures on the mechanical properties of the quartz fiber-reinforced silica composites processed by silicasol-infiltration-sintering (SIS) has been investigated.
Abstract: The effect of two different fiber architectures on the mechanical properties of the quartz fiber-reinforced silica composites processed by silicasol-infiltration-sintering (SIS) has been investigated. The composites were sintered at relatively low temperature (450 °C). The characteristics of 2.5D (shallow bend-joint) structure and 3D orthogonal structure were determined. The microstructures, flexural strength, shear strength and failure mechanisms of both 2.5D (shallow bend-joint) and 3D orthogonal composites were characterized. It was found that the fiber placement in the preform will strongly affect the mechanical property and failure behavior of the composite. The results of the tests and microstructural observations indicated that 2.5D (shallow bend-joint) quartz f /silica (Q f /S) composites had better mechanical properties than 3D orthogonal quartz f /silica composites.
23 citations
TL;DR: In this paper, 2.5D (shallow straight-joint) quartz fibers-reinforced silica composites were successfully prepared by silicasol-infiltration-sintering method.
21 citations