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Zhang Y.,Nanjing University of Technology | Kong D.,Jiangsu Gaochun Ceramics Co. | Yokogawa Y.,Osaka City University | Feng X.,Red Cross | And 2 more authors.
Journal of the American Ceramic Society | Year: 2012

The formation of sufficiently large three-dimensional nano/macroporosity in bone scaffolds remains a challenge despite the numerous fabrication methods reported in literature. The presence of such porosity is required for tissue ingrowth and for the concurrent degradation of implanted structure. A new technique of combining the slip casting and polymer sponge methods using the slips with different powders was introduced in the study to prepare hydroxyapatite scaffolds with bimodal pore sizes. This technique provided better control over the microstructures of scaffolds and enhanced their mechanical properties compared to traditional methods. With this technique, we were able to produce scaffolds with mechanical and structural properties that could not be attained by the polymer sponge or slip-casting method alone. The scaffolds were prepared with an open, uniform, and interconnected porous structure with a bimodal pore size of 100-300 μm. The bimodal porous hydroxyapatite scaffold sintered at 1200°C had a large flexural strength of 73.3 MPa and a porosity of 52.5 vol%. These bioscaffolds hold promise for applications in hard tissue engineering. © 2011 The American Ceramic Society.


Zhang Y.,Nanjing University of Technology | Kong D.,Jiangsu Gaochun Ceramics Co. | Feng X.,Red Cross
Ceramics International | Year: 2012

A new method to enhance the flexural strength of porous β-tricalcium phosphate (β-TCP) scaffolds was developed. This new method provides better control over the microstructures of the scaffolds and enhances the scaffolds' mechanical properties. Using this technique, we were able to produce scaffolds with mechanical and structural properties that cannot be attained by either the polymer sponge or slip-casting methods alone or by simply combining the polymer sponge and slip-casting methods. The prepared scaffolds had an open, uniform, interconnected porous structure with a bimodal pore size of 100.0-300.0 μm. The flexural strength of the bimodal porous β-TCP scaffold sintered at 1200 °C was 56.2 MPa and had porosity of 61.4 vol%. The scaffolds obtained provide good mechanical support while maintaining bioactivity, and hence, these bioscaffolds hold promise for applications in hard-tissue engineering. © 2011 Elsevier Ltd and Techna Group S.r.l.


Zhang Y.,Nanjing University of Technology | Kong D.,Jiangsu Gaochun Ceramics Co. | Tao Y.,Nanjing University of Technology | Zhu J.,Nanjing University of Technology | Yao N.,Nanjing University of Technology
Advanced Materials Research | Year: 2010

Calcium metaphosphate (CMP) fine powders were produced by a chemical precipitation method. In order to produce the powders, CMP was prepared by the mixing of two precursors, such as calcium oxide (CaO) and phosphate acid (H3PO4). Sparingly soluble chemicals, the Ca/P ratio of the mixture was set to be 0.50 to produce stoichiometric CMP, were chemical agitated in phosphate acid solution. At least 3 hours of pre-hydrolysis of phosphorus precursor were required to obtain CMP phase. The CMP powders were dried in a drying oven at 60°C for 72 hours and then heat-treated at various temperatures at a ramp of 1°C /min in air for various hours. The obtained powder was analyzed using XRD, XRF, FT-IR, SEM, TG-DTA, Zeta Potential Meter, Specific Surface Area, and Particle Size Analyzer. The results showed that obtained CMP powders have a significantly powder characteristics. © (2010) Trans Tech Publications.


Zhu J.,Nanjing University of Technology | Kong D.,Jiangsu Gaochun Ceramics Co. | Zhang Y.,Nanjing University of Technology | Yao N.,Nanjing University of Technology | And 2 more authors.
IOP Conference Series: Materials Science and Engineering | Year: 2011

Particles of Hydroxyapatite (HAp) were synthesized by means of chemical precipitation method, under atmosphere pressure. The starting solution with the Ca/P ratio of 1.67 was prepared by mixing 0.167 mol·dm-3 Ca(NO3)2·4H2O, 0.100 mol·dm-3 (NH4)2HPO4, 0.500 mol·dm-3 (NH2)2CO and 0.10 mol·dm-3 HNO3 aqueous solutions. The hydroxyapatite were prepared by heating the solution at 80 °C for 24 hour and then at 90°C for 72 hour. Then followed, the dry powers were heat treatment at 660°C temperatures for 8 hour. The obtained powder was analyzed using XRD, XRF, FT-IR, SEM, TG-DTA. The results showed that obtained HAp powers were greatly influenced by synthetic conditions. HAp powders with various morphologies, such as sphere, rod, layered, dumbbell, fibre, scaly, were obtained by controlling the synthetic conditions. © 2011 Ceramic Society of Japan.


Xu W.,East China University of Science and Technology | Ren J.,East China University of Science and Technology | Zhang Z.,East China University of Science and Technology | Chen G.,East China University of Science and Technology | And 4 more authors.
Journal of Non-Crystalline Solids | Year: 2013

A new down-conversion chalcohalide glass ceramics with a composition of 37.5GeS2-22.5Ga2S3-40CsCl (in mol %) doped with 0.15 Eu2 + and 0.1 Pr3 + (in mol %) is prepared. The crystallization is characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Ga2S3 crystallites in the nano-scale (20-80 nm) are obtained by the controlled crystallization. Visible photoluminescence properties of the glass and transparent glass ceramics are investigated. The mechanism responsible for the enhanced luminescence of both Eu2 + and Pr3 + in the glass ceramics was discussed from the point of view of the reduced phonon energy effect. © 2013 Elsevier B.V.


Xu X.,East China University of Science and Technology | Ren J.,East China University of Science and Technology | Chen G.,East China University of Science and Technology | Kong D.,Jiangsu Gaochun Ceramics Co. | And 3 more authors.
Optical Materials Express | Year: 2013

Bright green emission is obtained from the Mn2+-doped zinc gallogermanate phosphors. The X-ray diffraction (XRD) and photoelectron spectroscopy (XPS) confirm that zinc gallogermanate so obtained is a solid solution of ZnGa2O4 and Zn2GeO4. The slight change of structure for different sintered hours is reflected in the emission intensity of the Mn2+-doped samples. The low temperature electron paramagnetic resonance (EPR) spectra and PL decay curves are employed to probe into the different luminescence centers in the non-doped and Mn2+-doped zinc gallogermanate phosphors. © 2013 Optical Society of America.


Ren J.,East China University of Science and Technology | Ren J.,Jiangsu Gaochun Ceramics Co. | Xu X.,East China University of Science and Technology | Zeng H.,East China University of Science and Technology | And 6 more authors.
Journal of the American Ceramic Society | Year: 2014

Since 2012, zinc gallogermanate has drawn interests as an excellent host phosphor for a variety of dopants (e.g., Cr3+, Bi3+ and Mn2+). However, the origin of its self-activated luminescence has been largely unknown. Here, zinc gallogermanate of the composition Zn1+xGa2-2xGexO4 (0 ≤ x ≤ 1) is prepared by solid-state reaction, and the evolution of the crystal structure with the composition is studied. The phosphors show a broad white-bluish emission upon excitation by ultraviolet (UV) light, and the luminescence intensity greatly increases as Ga3+ are substituted by Ge4+. A full spectrum of the defects and trap centers responsible for the luminescence is given by a multiple characterization methods, such as low temperature electron spin resonance, positron annihilation lifetime and thermoluminescence spectra. The results show that the zinc gallogermanate is a promising self-activated phosphor for a variety of applications. © 2014 The American Ceramic Society.


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Trademark
Jiangsu Gaochun Ceramics Co. | Date: 2016-05-23

Porcelain for daily use, namely, basins, bowls, plates, kettles, tableware in the nature of scoops, pots; pottery for daily use, namely, basins, bowls, plates, jugs, pots, kettles and ceramic tableware in the nature of ceramic scoops; works of art, of porcelain, terra-cotta or glass; liqueur sets comprised of liqueur pourers; tea sets; coffee services; porcelain ware, namely, porcelain mugs; pottery, namely, ceramic figurines; tableware, other than knives, forks and spoons, namely, cups and mugs; utensils for household purposes, namely, kitchen tongs.


Trademark
Jiangsu Gaochun Ceramics Co. | Date: 2015-10-27

Utensils for household purposes, namely, serving trays; enamel and plastic ware for everyday use, namely, basins, bowls, plates, kettles, and cups; kitchen containers; glassware for everyday use, namely, cups, plates, kettles, and jars; porcelain for everyday use, namely, basins, bowls, plates, kettles, tableware in the nature of tea services, jars, jugs and pots; pottery for everyday use, namely, basins, bowls, plates, jars, jugs, pots, marmites in the nature of cooking pots, kettles, and ceramic tableware in the nature of tea services; acid-and alkali-resistant ceramic tea services; china ornaments; tri-coloured glazed pottery in the nature of tea services of the tang dynasty; works of art of porcelain, terra-cotta or glass.


Trademark
Jiangsu Gaochun Ceramics Co. | Date: 2016-08-02

Works of art of porcelain, terra-cotta and glass.

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