Papers by Keyword: Titanium Oxide

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Authors: Bing Li, Yan Hong Li, Wen Xing Chen
Abstract: To ensure the use of oil tank safely, it is necessary that the conductive coating was used in inner oil tank. This paper concentrates on a study of the electrical properties (surface resistance rate) of epoxy resins filled with different types of carbon pigments, such as colloid graphite, carbon black and mixture of colloid graphite/carbon black, as well as on the investigation of some mechanical properties, appearance and morphology .To produce a light grey and conductive coating, titanium oxide and carbon electro-conductive pigments were investigated in this article. The objective of the experiment therefore was to choose the optimal electro-conductive filler and determine the optimal mix ratio of colloid graphite/ carbon black and titanium oxide /colloid graphite and titanium oxide /mixable electro-conductive filler. From the experiment analysis, it was found that the optimized colloid graphite and carbon black mix ratio is 3:1; the optimized titanium oxide and colloid graphite mix ratio is 1:1; the optimized titanium oxide and mixable electro-conductive filler mix ratio is 8:1. In terms of resistance rate and color, we may arrive at the conclusion that 15μm colloid graphite as the optimized electro- conductive pigments and the optimal mix ratio of titanium oxide /colloid graphite is 1:1.
Authors: Li Ping Wang, Bang Cheng Yang, Ji Yong Chen, Xing Dong Zhang
Abstract: The bioactivities of titanium oxide film on titanium surface received from different chemical treatment methods were studied in SBF in vitro and mechanically and histologically investigated in vivo. Three groups of titanium specimens were prepared: untreated titanium(S), acid-alkali treated titanium (H), and acid-alkali and heat-treated titanium(X). The oxide film of X surface resulted in more apatite formation and significantly higher strength of the interface between the samples and bone than those of the other titanium groups. The surface of the acid-alkali treated titanium and that further treated by heat treatment had higher bioactivity and stronger bone-bonding ability.
Authors: L. Lavisse, C. Langlade, Pascal Berger, D. Grevey, A.B. Vannes
Authors: Seung Hoon Um, Sang Hoon Rhee
Abstract: Effect of oxide layer formed on commercially pure titanium by heat-treatment on adhesion of serum proteins and differentiation activity of osteoblasts. Commercially pure titanium disks were polished and then heat-treated at 700°C for 30 minutes. Titanium oxide layer (rutile phase) was observed to form on the titanium disk surface after heat-treatment. The contact angle of a water droplet on the heat-treated titanium disk was about 14o while that of non-heat treated one was about 68o. The amount of adsorbed total serum protein on heat-treated titanium disk was four times higher than that on non-heat treated one. ALP activity of primary cultured mouse calvarial osteoblasts on heat-treated titanium disk was also higher than that on non-heat treated one with statistical significance of p < 0.05. It implies that the serum proteins preferentially adsorbed on titanium oxide layer formed on commercially pure titanium and it is likely to enhance the differentiation activity of primary cultured mouse cultured osteoblasts.
Authors: Eiji Watanabe, Kaori Nishizawa, Masato Tazawa
Abstract: Because bromic acid ion generated by the ozone processing of drinking water for sterilization is strong carcinogenic, there is a high possibility in persons health hazard. The titanium dioxide was reduced at 900-degree Centigrade by the gas atmosphere (CO or H2). It was found that the concentration of the bromic acid ion in water was decreased at time when the reduced titanium oxide was added to water including the bromic acid ion. The bromic acid ion in water could be adsorbed by the titanium oxide reduced. In addition, it was suggested that the bromic acid ion could be decomposed into the bromide ion with low carcinogenic by using the photocatalitic function of titanium oxide under UV irradiation.
Authors: Akira Watazu, Kay Teraoka, Hirofumi Kido, Kae Okamatsu, Yoshiyuki Nagashima, M. Morita, Masanori Matsuura, Naobumi Saito
Abstract: Commercially pure titanium thin films were uniformly formed on inner surfaces of tissue culture dishes by DC sputtering method. Then, the thickness of the film was about 30nm and the films were thin titanium oxide layer on commercially pure titanium. MC3T3-E1 cells were normally cultured on the dishes. Then, The films on the dishes were not broken and did not decompose. After 24 hours, observations of the sample from the direction of the cells' bottom surfaces adhered the titanium oxide on the commercially pure titanium film by an inverted optical microscope succeeded. Therefore, the new technique is useful for observations the interactions between titanium oxide and cells.
Authors: Haleh Kangarloo, Fahime Farid Shaygan, Saeid Rafizadeh
Abstract: Using resistive heated method, Ti films of different thickness ranging from 10 to 200 nm were deposited and post-annealed at a temperature of 473K with a flow of oxygen. The optical properties were measured by transmission spectroscopy in spectral range of 200-2500 nm. The optical functions were obtained from the Kramers-Kronig analysis of the reflectivity curves. The effective medium approximation analysis was employed to establish the relationship between the nano-structure and Effective-Media Approximation (EMA) predictions.It was found the temperature of deposition and thefilm thickness play important roles in the nano-structure of the film and cause significant variations in the optical behaviour of thin Titanium oxide films.
Authors: Galina V. Arysheva, Nina M. Ivanova, Maksim E. Konishchev, Alla A. Pustovalova, Vladimidr S. Sypchenko
Abstract: The results of study of surface morphology and chemical composition of biocompatible titanium oxide and oxynitride coatings deposited by the method of reactive magnetron sputtering are presented in this paper. The distribution of coating’s fragments in size was obtained. Molecular composition of the coatings was obtained by scanning electron microscopy and Raman scattering.
Authors: Gabriela Delli Colli Zocolaro, Gisele S. Silveira, Marcos A.L. Nobre, Silvania Lanfredi
Abstract: The control of environmental pollution has led to an intensive search for innovative and efficient technologies for wastewater treatment, especially those with toxic or non-biodegradable compounds. In this sense, this work involved the preparation of a hybrid composite of TiO2 with amorphous carbon by partial pyrolysis method and the analysis of their photocatalytic potential using phenol red dye as a test molecule. The composite was characterized by X-ray diffraction (XRD), infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The evaluation of morphology and the structural characterization of the powder confirmed the formation of the hybrid composite of TiO2 dispersed in a carbon matrix with turbostratic structure, organized in the shape of overlapping plates. The composite presented a discoloration rate of 67% after 4 hours of irradiation. The photocatalytic reaction follows a kinetics of first order type.
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