scispace - formally typeset
Search or ask a question
Author

Yinghui Yan

Bio: Yinghui Yan is an academic researcher from Tsinghua University. The author has contributed to research in topics: Ceramic & Silicon carbide. The author has an hindex of 5, co-authored 5 publications receiving 79 citations.

Papers
More filters
Journal ArticleDOI
Limin Shi1, Hongsheng Zhao1, Yinghui Yan1, Ziqiang Li1, Chunhe Tang1 
TL;DR: In this article, a three-step process is used to fabricate submicron silicon carbide powders in the reaction of silicon with carbon during the third step of thermal treatment.

44 citations

Journal ArticleDOI
Limin Shi1, Hongsheng Zhao1, Yinghui Yan1, Ziqiang Li1, Chunhe Tang1 
TL;DR: The phase composition, residual free carbon content, and microstructure have been investigated by X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy, respectively as mentioned in this paper.

13 citations

Journal ArticleDOI
TL;DR: In this article, a coarse-to-fine coat mix process is employed to synthesize high purity porous SiC ceramics with phenolic resin and silicon powders as starting materials.
Abstract: Coat mix process is employed to synthesize high purity porous SiC ceramics with phenolic resin and silicon powders as starting materials. The results show that the fabricated porous SiC ceramics have a homogeneous structure with interconnected open pores and dense struts. They also have a relatively narrow pore size distribution in the range of 1–6 μm. The total porosity and the average pore size are 62% and 2.6 μm, respectively.

12 citations

Patent
23 Nov 2005
TL;DR: In this paper, a method for preparing porous silicon carbide ceramic with high strength was proposed, which belongs to the technical field of porous porosity and high strength, and the method comprises five steps of preparing precursor powder, adding addition agent, molding by pressure, carbonizing and sintering.
Abstract: The invention discloses a method for preparing porous silicon carbide ceramic with high strength, which belongs to the technical field of porous ceramic. The method comprises five steps of preparing precursor powder, adding addition agent, molding by pressure, carbonizing and sintering. The silicon-resin core shell structure precursor powder with silicon powder covered by resin via a pH value of a system is regulated in an aging step of a traditional coat mix process. According to the invention, the pH value of the system is regulated in the aging step of the coat mix process for preparing the silicon-resin core shell structure precursor powder, so that a cross linking degree of the resin is varied, a resin stability is improved, and a coating efficiency is improved. Therefore, the final-obtained silicon carbide ceramic has advantages of high strength (a bending strength is 10-30 MPa), low thermal expansion coefficient and the like. Meanwhile, characteristics, such as high porosity (more than 80%), average pore size in a range of 100-300 microns, uniform pore size distribution, high thermal shock resistance (strength loss ranges from 6.5% to 30% in 30 thermal shocks at 800 DEG C) and the like, of the silicon carbide ceramic prepared by a traditional process are maintained.

10 citations

Journal ArticleDOI
Limin Shi1, Hongsheng Zhao1, Yinghui Yan1, Ziqiang Li1, Chunhe Tang1 
TL;DR: In this article, high specific surface area porous SiC ceramics, coated completely with reticulated amorphous SiC nanowires, have been fabricated with commercially available phenolic resin and silicon powders using a novel method.
Abstract: High specific surface area porous SiC ceramics, coated completely with reticulated amorphous SiC nanowires, have been fabricated with commercially available phenolic resin and silicon powders using a novel method. The results indicate that the specific surface area and porosity of the as-synthesized materials can be up to 112 m2 g−1 and 81%, respectively. The coated amorphous SiC nanowires have uniform structure and smooth surfaces. The electron emission turn-on field and threshold field are about 2.9 and 6.7 V μm−1, respectively. This kind of materials may simultaneously possess the unique properties of porous materials, SiC, and nanowires. And they may have promising applications in a wide variety of areas.

6 citations


Cited by
More filters
Journal ArticleDOI
01 Oct 2013-Carbon
TL;DR: In this paper, the mechanical behavior of 2D carbon fiber reinforced silicon carbide (C/SiC) composites at both quasi-static and dynamic uniaxial compression under temperatures ranging from 293 to 1273 K was investigated.

76 citations

Journal ArticleDOI
TL;DR: The profoundly improved tabletability of acetaminophen confirmed the effectiveness of the particle coating approach in improving tableting performance of drugs and is expected to have transformative effects on formulation development of poorly compressible drugs.
Abstract: Purpose To test the hypothesis that coating particles with a highly bonding polymer is effective in improving tabletability of poorly compressible drugs

69 citations

Journal ArticleDOI
TL;DR: In this paper, the structural evolution of graphite and morphologies of silicon carbide whiskers were studied with the aids of XRD, SEM, TEM and EDS techniques.

59 citations

Journal ArticleDOI
TL;DR: In this paper, the microwave absorbing properties of lithium aluminum silicate (LAS) and LAS-SiC double layer composite absorbers were investigated within the frequency range of 8.2-12.4 GHz at 300-500°C.

48 citations

Journal ArticleDOI
TL;DR: In this article, nano-sized β-SiC particles were synthesized from sol-gel process by employing APC as a dispersant agent and adjusting pH in the range of 2.5-4.
Abstract: Nano sized β-SiC particles were synthesized from sol–gel process. Mono dispersed β-SiC nano particles with semi spherical morphology were obtained by employing APC as a dispersant agent and adjusting pH in the range of 2.5–4. Phenolic resin and TEOS were employed as precursors and heat treatment was conducted up to 1500 °C. Different techniques such as XRD, DTA, FTIR, PSA, SEM and TEM were used to characterize the formation of β-SiC. The (Si–O-C) bonds were formed by hydrolysis and condensation reactions in the gel while the nucleation of crystalline β-SiC was found to be initiated at 1400 °C. The primary particles in the sol were found to be (< 10 nm) while the size distribution in the final product was recorded in the range of 30–50 nm.

47 citations