South China Institute of Fine Ceramics

Foshan, China

South China Institute of Fine Ceramics

Foshan, China

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Wang S.,Shantou University | Zhang D.,Shantou University | Ouyang X.,South China Institute of Fine Ceramics | Wang Y.,South China Institute of Fine Ceramics | Liu G.,Shantou University
Journal of Alloys and Compounds | Year: 2016

It is attempt to enhance the thermal conductivity of Al2O3/glass by introducing one-dimensional materials into the Al2O3/glass composite which are fired at 850 °C. The influences of AlN whiskers, carbon fibers and copper fibers on the thermal conductivity of Al2O3/30 vol% glass composites were studied by the laser thermal conductance instrument, XRD and SEM. The results show that the adding of one-dimensional materials with excellent thermal conductivity remarkably enhances the thermal property of the composites. The oxidation of AlN or copper was not detected when the composites were sintered at 850 °C with 25 MPa for 45 min in a nitrogen atmosphere. Fibers are more effective to enhance the densification of the composites than the whiskers. The highest value of the thermal conductivity of Al2O3/glass/copper fiber achieves 38.9 W (mK)-1, an increase of about 500%. The clear enhancement of the thermal conductivity is due to the bridging network formed by the one-dimensional materials. © 2016 Elsevier B.V.


Wang S.X.,Shantou University | Liu G.S.,Shantou University | Ouyang X.Q.,South China Institute of Fine Ceramics | Wang Y.D.,South China Institute of Fine Ceramics | Zhang D.,Shantou University
Journal of Materials Engineering and Performance | Year: 2016

In this paper, carbon fiber with high thermal conductivity was introduced into the alumina-based composites. To avoid oriented alignment of carbon fibers (Cf) and carbothermal reactions during the sintering process, the Al2O3/glass/Cf substrate was hot-pressed under a segmental-pressure procedure at 1123 K. Experimental results show that carbon fibers randomly distribute and form a bridging structure in the matrix. The three-dimensional network of Cf in Al2O3/glass/Cf substrate brings excellent heat conducting performance due to the heat conduction by electrons. The thermal conductivity of Al2O3/30%glass/30%Cf is as high as 28.98 W mK−1, which is 4.56 times larger than that of Al2O3/30%glass. © 2015, ASM International.


Wang S.-X.,Shantou University | Wang S.-X.,South China Institute of Fine Ceramics | Han D.-H.,South China Institute of Fine Ceramics | Yang J.,South China Institute of Fine Ceramics | And 2 more authors.
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2011

Ultrafine vanadium-zirconium silicate(V-ZrSiO 4) blue ceramic pigment for Ink-Jet printing was synthesized by low-temperature Combustion-Calcination method. The influences of processing parameters, such as the ignition and calcination temperature on the ceramic pigment granularity, color performance and particle size distribution were investigated respectively. The pigments were characterized by XRD, SEM, laser granularity analysis and chromatic aberration. The results indicated that the CH 3COONH 4, Zr(NO 3) 4·3H 2O and SiO 2 agents can be ignited and self-propagating at 500°C. However, the main synthesis product powder is porosity. After calcined at 900°C, the main phase of the ceramic pigments is ZrSiO 4 and it has excellent chromatic performance. The average particle size is about 0.83 μm and its distribution is concentrated. The pigments have high color stability and chemical homogeneity in the glaze.


Wang S.X.,Shantou University | Liu G.S.,Shantou University | Ouyang X.Q.,Shantou University | Ouyang X.Q.,South China Institute of Fine Ceramics | And 3 more authors.
Transactions of the Indian Ceramic Society | Year: 2015

Carbon fiber (Cf) with high thermal conductivity was introduced into the alumina based composites. To avoid oriented alignment of carbon fibers and carbothermal reactions during the sintering process, the Al2O3/glass/Cf substrate was hot pressed under a segmental pressure procedure at 1123 K. Experimental results showed that the thermal conductivity of Al2O3/glass/Cf increased with the contents of Cf when the volume of Cf was below 30%. The thermal conductivity of Al2O3/30% glass/30% Cf was as high as 28.98 W.(mK)–1, which was 4.56 times and 2.23 times higher than that of Al2O3/30% glass and AlN/30% glass, respectively. However, the thermal conductivity of Al2O3/glass/Cf decreased with the contents of Cf when the volume of Cf was over 30%. In the Al2O3/30% glass/30% Cf composite, carbon fibers lapped with each other and formed a three dimensional network in the matrix. The three dimensional network of carbon fibers brought excellent heat conducting performance to the Al2O3/30% glass/30% Cf composite. © 2015 Indian Ceramic Society.


Wang S.,South China Institute of Fine Ceramics | Yang J.,South China Institute of Fine Ceramics | Ouyang X.,South China Institute of Fine Ceramics | Han D.,South China Institute of Fine Ceramics
Advanced Materials Research | Year: 2011

Mn-doped alumina red pigment was prepared with Mn(NO3) 2.6H2O and Al(NO3)3.9H2O as main raw materials by Low-temperature Combustion-Calcination process. The Mn-doped alumina red pigment was tested by XRD, SEM and CIE L*a* b* colour parameter measurement. The results showed that the reaction of Mn(NO3)2.6H2O, Al(NO3) 3.9H2O and CH3COONH4 with the theoretical ratio could be ignited and self-propagating at 500 °C. One kind pigment with excellent chromatic performance had been gained at the ratio about 1:40 between n(NO3)2.6H2O and Al(NO 3)3.9H2O.The crystallite of the precursor obtained by Low-temperature Combustion synthesis (LCS) is imperfectly developed and the aggregation of particles is serious. The crystallite of the powder grows up more perfectly after calcined at 1000 °C for 4 hour with a corundum-like structure. The average particle size of the pigment is approximately 5 μm. © (2011) Trans Tech Publications, Switzerland.

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