Papers by Author: Li Juan Wang

Abstract: The effects of sepiolite mineral nanofiber on strength and toughness of ceramics were investigated by bone china with addition of sepiolite mineral nanofiber. The flexural strength and fracture toughness were tested by three point bending method and single edge notched beam (SENB) method, and the microstructure of the ceramics was studied by scanning electron microscopy (SEM), X-ray diffraction (XRD) and optical microscopy. The results indicated that the structure pattern of sepiolite mineral nanofiber became much shorter and thicker after calcinations. Proper addition of sepiolite mineral nanofiber would increase the strength and toughness of bone china. The sepiolite mineral nanofiber can yield the bone china with fracture toughness and flexural strength values as high as 5.65 MPa·m^1/2 and 112.66 MPa to 5.87 MPa·m^1/2 and 118.90 MPa, mainly due to crack bridging, crack deflection and pullout by sepiolite mineral nanofiber.

Abstract: During rubber processing, many factors can affect the mechanical properties of rubber composite. The influence of ambient temperature and content of titanate coupling agent and modified attapulgite (OAT) on mechanical properties were investigated by preparing rubber composites and measuring. The results showed that the rubber composite which was filled 40phr OAT modified by 3% titanate and prepared at the ambient temperature above 20 had best tensile strength (18.93MPa). There is a special phenomenon that the tensile strength had a rapid increase from 4.72MPa to 18.93MPa, when the content of OAT changed from 20 to 40phr in the experiment.

Abstract: Material industry is a basic industry in our national economy. In order to develop our new material industry, the independent innovation capability should be improved and the compound innovation talents of science and technology should be trained. The popularization education of the intellectual property should be brought into the quality education system of the college students. This is of important significance for developing the strategic new industry in the field of new material. Combined the training practice on the innovation talents of science and technology in the industries of the new energy and environment functional materials, the education mode of the intellectual property for the compound innovation talents of science and technology in the functional material industry was studied.

Abstract: The developments of antibacterial ceramics technology were introduced. A new type of antibacterial agent used in bone china, multifuntional healthy ceramic materials antibacterial mechanism, was discussed. With the quick development of antibacterial bone china technology and market, it was necessary to estabish the antibacterial bone china standard.

Abstract: Developing easy cleaning and antibacterial ceramics is the key to actualize the ceramics with functionalized, high-quality and band established in china. This paper which combined with research status from home and broad analysed the performance influence of ceramic glaze with different processing methods and discussed the way and methods which can improve the quality of ceramics.

Abstract: Nanometer far-infrared materials (NFIM) were doped into ceramic glazes to prepare easy-to-clean ceramic glazes，and the effect of NFIM on the cleanability properties was investigated. Static contact angle measurements were used to describe the surface hydrophilic property and calculate the surface free energy. The effect of far-infrared radiance measured by Fourier Transform Infrared Spectrometer on the O/W interface tension was tested by a Dynamic Contact Angle Meter and Tensiometer. The cleanability was estimated by the ultraviolet spectrophotometry technique using oleic acid as soiling agent. It was shown that the better cleanability of the ceramic glazes, the higher surface free energy and its polar contribution. The experiments were carried out on detachment of oleic acid drop from the easy-to-clean ceramic glazes. The three-phase contact line shrinked spontaneously, and eventually the oil drop detached from the surface. The spontaneous detachment of a drop corresponded to two different driving factors: (1) the decrease of oil-water interfacial tension caused by the far-infrared radiation of the glazes, (2) the spontaneous advancement of aqueous meniscus owing to the penetration of water between the oil and super hydrophilic glaze surfaces.

Abstract: The research progress and university education situation in ecological environment functional materials (EEFMS) in China were analyzed. A new subject of EEFMS involved in many subject knowledge, such as materials, energy and environment, has come into being due to the rapid development of the advance industry of energy and environment materials in the last decade, as well as a serial of new industries of micro-environment control functional materials, and so on. At the same time, the university education was accelerated in the direction of the research in EEFMS.

Abstract: A series of surface physicochemical properties were studied which could provide theory basis for the research of easy-cleaning ceramic. The crystal structure and microstructure were characterized by x–ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The surface morphology was observed by atom force microscope (AFM). Static contact angle measurements were used to calculate surface free energy SFE and its components with a Dataphysics OCA-30 contact angle analyzer. The results showed that SFE and its components varied with such chemical composition as the ratio of silica to alumina, and fusing agent. The lower adhesion work of oil under water on the glaze surface with higher surface free energy and polar component, the better the cleanability. The AFM and SEM results showed that the easy-cleaning glaze surface was smoother and the section was denser and less porous. The far-infrared radiance of easy-cleaning ceramic was 92.7%

Abstract: The application of ionic functional materials for energy saving and emission reduction in China was introduced in this paper. Firstly, the application of mine materials in the field of architectural energy saving, including heat insulation materials, combustion energy saving materials and enhancing heat emission materials,etc, was introduced. Secondly, the application of ionic functional materials in the field of automobile energy saving was introduced. The product technology of promoting energy saving through activating fuel, air and cycling water by activative bed technology was also introduced, aimed at industry boiler. Finally, the application in battery field of lithium-ion storage materials, including natural pyrite and lithium iron phosphate materials was introduced.

Abstract: Effect of acute toxicity and chronic toxicity on attapulgite for animal was studied by Kunming mice and SD rats experiment through administering intragastrically with large dose of attapulgite suspension. The results showed that the mice were normal and grew well, and they did not appear death and toxicity symptoms when they received the same amount as 286 times of the adult dose, indicating that attapulgite mineral powders did not contain acute toxicity and administering intragastrically with large dose of attapulgite suspension had no obvious influence on blood environment and normal growth of rats, and attapulgite did not contain chronic toxicity.