Authors: Y.M. Zhu, Xia Wan Wu, Zhi Hong Li
Abstract: In order to reduce the raw materials cost, lower the sintering temperature of 3Y-TZP optical fiber ferrules, the 3Y-TZP/ LAS glass ceramics composites were prepared and their properties were investigated in this paper. The results showed that the sintering temperatures and thermal expansion coefficients of the 3Y-TZP/LAS glass ceramics composites were lowered with the increase of glass content. The flexural strength of the composites were decreased with the increase of glass content, but
the flexural strength of the composite with 15% weight glass was higher than 400MPa. The LAS glass powder added into the composites was crystallized and b-spodumene s.s was precipitated. during sintering. The b-spodumene s.s. having lower thermal expansion coefficient and higher strength was beneficial to reduce thermal expansion coefficients and keep higher strengths of the composites .
995
Authors: Chang Min Suh, Ki Sang Jung
Abstract: Ceramic ferrule that is a major part of the optic connectors requires a high level of precision in a grinding chamfer. After the grinding chamfer, there is a problem in that the subsurface damages cannot be removed. The objective of this study was to analyze the grinding force and the associated stress generated in a ceramic ferrule during cylindrically grinding chamfer using Finite Element Analysis (FEA). A two-dimensional finite element model was constructed with the grinding parameters and the mechanical properties of the ferrule as input variables. The size of the geometric
model was the same with the ceramic ferrule. The experimental results achieved by the SEM photograph were compared with those from the FEM. The FEM results were in correlation with those of the experiments.
2327
Authors: Y.M. Zhu, Xia Wan Wu, Zhi Hong Li
Abstract: The crystallization and sintering of the Li2O-Al2O3-SiO2 glass powder compacts were studied.
Results showed the relative densities of the sintered compacts with lower crystallization temperatures
were higher than those with higher crystallization temperatures. A small amount of residual glass in the
crystallized compact was good for sintering and densification. Compared with the heat treatment time, the
heat treatment temperature was an important factor for the crystallization and sintering of glass powder
compacts. The crystallized compacts with a small amount of residual glass should be sintered at a relatively
higher heating rate under the prerequisite of keeping sintered compacts from deformation.
1840
Authors: Eun Sang Lee, Jung Hyung Lee
Abstract: The surface roughness in centerless grinding is mainly affected by the many process
parameters. For decreasing the surface roughness, the control of grinding parameters is very
important. This paper deal with the analysis of the process parameters such as height of centers,
tilting angle of the regulating wheel, speed of the regulating wheel, developed based on Taguchi
method and response surface method. The effect of grinding parameters on the surface roughness
was evaluated the utilization of the response surface model was evaluated with constraints of the
surface roughness.
9
Authors: F. Liu, Bin Lin, Mei Min Zhang, L.J. Li
Abstract: The output for ZrO2 fiber ferrule can be improved by ceramic injection moulding technology efficiently. In order to increase the ratio of ceramic powder which can improve mechanics quality and dimensional precision of ZrO2 ferrule, the gating system for ferrule mould is redesigned in this paper. After analytic calculation and simulation analysis, U-shape is adopted as the optimal cross-section shape in the cold flow channel injection mould for higher efficiency and filling effects. Moreover, three common cooling systems for ceramic injection mould are analysed and the results show that the cooling system with the pipe layout of double ring can be considered to be optimal to improve cooling efficiency, uniform temperature and heat balance effect of fiber ferrule mould.
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