고온 가압 적층 소결에 의한 황화아연 세라믹스의 광학성 특성
Optical properties of ZnS ceramics by hot press stack sintering process
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During the manufacture of a ZnS lens with excellent transmittance in the mid-infrared region (3-5 µm) by the hot-press process, a single-layer sintering method is used in which one lens is manufactured in one process. Additional research is required to improve this single-layer sintering method because of its low manufacturing efficiency. To solve this problem, the variation in optical properties of ZnS lenses with change in sintering temperature was investigated by introducing a Stack sintering method that can sinter multiple lenses simultaneously. A carbon paper was placed between the molded lenses and sintered into five layers. The average permeability of 67% at medium infrared wavelengths of 3-5 µm was excellent under the following sintering conditions: pressure of 50 MPa and temperature of 850oC. This value is 1% less than the average permeability in the case of single-layer sintering of the ZnS lens. It was confirmed that the stack sintering method developed in this study can be used to manufacture a large number of lenses with excellent characteristics in a single process.
Abstract
During the manufacture of a ZnS lens with excellent transmittance in the mid-infrared region (3-5 µm) by the hot-press process, a single-layer sintering method is used in which one lens is manufactured in one process. Additional research is required to improve this single-layer sintering method because of its low manufacturing efficiency. To solve this problem, the variation in optical properties of ZnS lenses with change in sintering temperature was investigated by introducing a Stack sintering method that can sinter multiple lenses simultaneously. A carbon paper was placed between the molded lenses and sintered into five layers. The average permeability of 67% at medium infrared wavelengths of 3-5 µm was excellent under the following sintering conditions: pressure of 50 MPa and temperature of 850oC. This value is 1% less than the average permeability in the case of single-layer sintering of the ZnS lens. It was confirmed that the stack sintering method developed in this study can be used to manufacture a large number of lenses with excellent characteristics in a single process.
참고문헌 (11)
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