State Key Laboratory of Silicate Materials for Architectures

Wuhan, China

State Key Laboratory of Silicate Materials for Architectures

Wuhan, China
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Wang X.-Y.,State Key Laboratory of Silicate Materials for Architectures | Leng J.,State Key Laboratory of Silicate Materials for Architectures | Wang S.-M.,State Key Laboratory of Silicate Materials for Architectures | Asiri A.M.,King Abdulaziz University | And 2 more authors.
Tetrahedron Letters | Year: 2017

A practical one-pot process for hydrodeoxygenation (HDO) of phenolic derivatives to their corresponding arenes was developed. This method provided a facile route to upgrading bio-oil. The substrate scope of this protocol was wide, complicated and multi-phenolic compounds were also smoothly hydrodeoxygenated to their corresponding arenes. © 2017 Elsevier Ltd.


Fang B.Z.,Peking University | Li H.,Peking University | Cao J.W.,Peking University | Wu J.F.,State Key Laboratory of Silicate Materials for Architectures | And 2 more authors.
Advanced Materials Research | Year: 2014

In order to further broaden the application field of calcined bauxite, usingdifferential thermal analysis-thermo-gravimetry(DTA-TG), X-ray diffraction analysis (XRD), Scanning electron microscopy (SEM) and other testing technology to study and analysis on the high temperature performance of calcined bauxite in this paper. The results show that the main crystal phases of calcined bauxite are corundum and mullite, appearance is layered, granular distribution. Due to the thermal performance of calcined bauxite is optimal, and is expected to be used for the field of high temperature solar thermal heat storage material. © (2014) Trans Tech Publications, Switzerland.


Fang B.Z.,Peking University | Li H.,Peking University | Cao J.W.,Peking University | Wu J.F.,State Key Laboratory of Silicate Materials for Architectures | And 2 more authors.
Advanced Materials Research | Year: 2014

In order to further broaden the application field of calcined bauxite, using XRF and other testing technology to study and analysis on the high temperature performance of calcined bauxite in this paper. The results showed that the sintering temperature range was 1300 ~ 165°C, the firing line shrinkage, bulk density, bending strength, heat capacity and thermal conductivity was increased gradually, the water absorption and porosity was decreased, the water absorption, volume density and flexural strength of the sample fired at 1650°C were 0.93%, 3.20 g·cm-3 and 182.23 MPa, the specific heat and thermal conductivity were 0.83 kJ·(kg·K)-1 and 9.21 W·(m·K)-1. Due to the thermal performance of calcined bauxite is optimal, and is expected to be used for the field of high temperature solar thermal heat storage material. © (2014) Trans Tech Publications, Switzerland.


Fang W.-Y.,State Key Laboratory of Silicate Materials for Architectures | Leng J.,State Key Laboratory of Silicate Materials for Architectures | Qin H.-L.,State Key Laboratory of Silicate Materials for Architectures
Chemistry - An Asian Journal | Year: 2017

A one-pot Pd-catalyzed carbonylation of phenols into their corresponding aryl carboxylic acids and esters through the insertion of carbon monoxide has been developed. This procedure offers a direct synthesis of aryl carboxylic acids and esters from inexpensive and abundant starting materials (phenols, SO2F2 and CO) under mild conditions. This method tolerates a broad range of functional groups and is also applicable for the modification of complicated natural products. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.


Shui Z.,Wuhan University of Technology | Shui Z.,State Key Laboratory of Silicate Materials for Architectures | Zeng J.,Wuhan University of Technology | Zeng J.,State Key Laboratory of Silicate Materials for Architectures | And 4 more authors.
Key Engineering Materials | Year: 2012

Concrete with a compressive strength of 100MPa was produced with metakaolin(MK), and the effect of MK replacement levels on compressive strength of concrete with a water to binder ratio of 0.25 was studied in this paper. XRD, microhardness tests, SEM and MIP were used to investigate the influences of MK on the phase composition, microhardness of interfacial transition zone(ITZ), microstructural morphology and pore structure of the high-strength concrete (HSC). The results showed that the incorporation of MK promoted the hydration process and decreased the amount of Ca(OH)2 crystals. Furthermore, MK increased the ITZ microhardness of HSC, enhanced the hydrates and improved the bond performance of aggregate and paste. The weak zone between aggregate and paste became almost disappeared when 10% MK was blended. Meanwhile, refinement of the concrete pore structure was obtained in the presence of MK. The improvement of strength and microstructure became more obvious as the MK replacement level increased to 15%. © (2012) Trans Tech Publications.


Xu X.-H.,Wuhan University of Technology | Xu X.-Y.,Wuhan University of Technology | Wu J.-F.,State Key Laboratory of Silicate Materials for Architectures | Zhou Y.,State Key Laboratory of Silicate Materials for Architectures | He D.-Z.,State Key Laboratory of Silicate Materials for Architectures
Applied Mechanics and Materials | Year: 2014

AI2O3 composite ceramics materials used for heat transmission pipeline were prepared by pressureless sintering in air. Calcined bauxite, talc and commercial alumina powder were used as the main raw materials, partially stabilized zirconia was also added to improve the thermal shock resistance of the samples. The effects of composition and sintering temperature on density, phase composition, microstructure and thermal shock behavior of samples were evaluated. It shows that the B2 sample which was sintered at 1400 °C for 2h has optimal properties with porosity 0.4%, -1bulk density 3.2g»cm".The bending strength increases 19.46 MPa after 30 times thermal shock cycles from 1100 °C to room temperature. The main phases of B2 are corundum and spinel, meanwhile, a small amount of monoclinic zirconia and a-quartz are also detected according to XRD pattern. Microstructure analysis reveals that spinel crystals are interlocked by prismatic corundum crystals, bright white beaded monoclinic zirconia particles are distributed uniformly, and it is beneficial to improve the thermal shock resistance of sample. © (2014) Trans Tech Publications, Switzerland.


Mou T.,Chinese Research Institute of Highway | Ding Q.,State Key Laboratory of Silicate Materials for Architectures | Zhou X.,State Key Laboratory of Silicate Materials for Architectures | Fan B.,Chinese Research Institute of Highway
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2012

"Studs and steel mesh and common concrete" and "Studs and steel fiber reinforced concrete" were two schemes widely used in concrete bridge deck pavement. In order to explore the anti-fatigue performance of the two schemes, five structure models were designed and steel fiber, steel mesh and studs spacing were the dominant variables. Experiments show that studs spacing had no consistent effect on the fatigue performance of the specimens. The second program avoided the problem to locate the steel mesh. And steel fiber reinforced concrete exhibit excellent performance of anti-crack, even if there were cracks but did not collapse. Finally, the second scheme was proposed to adopt in the concrete bridge deck pavement.


Wu J.,State Key Laboratory of Silicate Materials for Architectures | Fang B.,State Key Laboratory of Silicate Materials for Architectures | Xu X.,State Key Laboratory of Silicate Materials for Architectures | Zheng S.,State Key Laboratory of Silicate Materials for Architectures | Yi G.,State Key Laboratory of Silicate Materials for Architectures
Journal Wuhan University of Technology, Materials Science Edition | Year: 2013

A cordierite was synthesized from calcined bauxite,talcum,and quartz. The properties and microstructure of the cordierite sintered samples were characterized by Archimedes' method,thermal dilatometry,X-ray diffraction (XRD),scanning electron microscopy (SEM),and so on. The experimental results showed that calcined bauxite could broaden the range of synthesizing temperature from 1300 °C to 1420 °C and get pure cordierite. The bulk density and linear thermal expansion coefficient of the sample synthesized at 1420 °C for 2 h were 1.97 g.cm3 and 2.1×10-6 °C -1,respectively. The XRD analysis showed that the major crystalline phase was a-cordierite with almost no glassy matters,the SEM images illustrated a small vent hole and the size were 5-100 μm,the well-grown hexagonal and granular cordierite grains had the sizes distributed among 0.1-8 μm,and providing high mechanical strength and lower linear thermal expansion coefficient. © Wuhan University of Technology and SpringerVerlag Berlin Heidelberg 2013.


Wu J.F.,State Key Laboratory of Silicate Materials for Architectures | Cheng H.,State Key Laboratory of Silicate Materials for Architectures | Xu X.H.,State Key Laboratory of Silicate Materials for Architectures | Deng T.F.,State Key Laboratory of Silicate Materials for Architectures
Advanced Materials Research | Year: 2014

The ceramics with large bulk density and high bending strength were fabricated via semi-dry pressing and pressureless sintering in the air. Andalusite and calcined bauxite were used as the raw materials, sintering aids such as potassium feldspar, albite, talc, spodumene and borax were added to promote the densification and decrease the sintering temperature of the samples. The best physical properties were obtained on a sample of optimal composition (the addition of sintering aid was talc) sintered at 1500 °C for 3 h, i.e. a bending strength of 138.52 MPa and bulk density of 2.61g•cm-3, the sintering temperature was lower than sample without addition of sintering aid. © (2014) Trans Tech Publications, Switzerland.


Zhu Y.,State Key Laboratory of Silicate Materials for Architectures | Ma B.,State Key Laboratory of Silicate Materials for Architectures | Tan H.,State Key Laboratory of Silicate Materials for Architectures
Advanced Materials Research | Year: 2012

Several polycarboxylate superplasticizers (PCs) with different side-chain structure have been synthesized. The effect of side-chain structure of PCs on hydration of C 3A has been investigated by XRD, TG-DSC and SEM. The results show that PCs restrain hydration of C 3A as a whole, but accelerate formation of Al(OH) 3 and C 3AH 6; with increase molecular weight of long-side-chain, hydration of C 3A is slowed, and the formation of Al(OH) 3 and C 2AH 8 also become slowed. With increase proportion of long-side-chain, hydration of C 3A and formation of C 3AH 6 are slowed, but existence of C 2AH 8 become obvious. The six-party flake hydrated products of C 3AH 6 are formed with a large number of grafted carboxyl. © (2012) Trans Tech Publications, Switzerland.

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