Effects of Sintering Atmosphere on the PLMNT Transparent Ceramics Prepared by Hot-Press Sintering Method
| Autor: | Xiyun He, Dong Wang, Xia Zeng, Wenlong Ji, Pingsun Qiu, Dazhi Sun, Xiaolong Sun, Wenxiu Cheng, Bin Xia |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Transparent ceramics Sintering chemistry.chemical_element 02 engineering and technology Thermal treatment 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Oxygen Electronic Optical and Magnetic Materials Atmosphere chemistry visual_art 0103 physical sciences visual_art.visual_art_medium Transmittance Ceramic Composite material 0210 nano-technology Perovskite (structure) |
| Zdroj: | Ferroelectrics. 490:196-202 |
| ISSN: | 1563-5112 0015-0193 |
| DOI: | 10.1080/00150193.2015.1071605 |
| Popis: | La modified Pb(Mg1/3Nb2/3)O3-PbTiO3 (PLMNT) transparent electro-optic (EO) ceramics with pure perovskite phase were fabricated by the uniaxial hot-press sintering method. An improved hot-press sintering technique with varied atmosphere was proposed to eliminate the pore defects. It consists of four stages: 1) sintering at a relatively low temperature (800°C) in the vacuum atmosphere first, and then in the pure O2 atmosphere; 2) sintering in a pure O2 atmosphere at high temperature by uniaxial hot-press method; 3) replacing the O2 atmosphere with CO2 gas to eliminate the residual closed pores; 4) finally exchanging CO2 atmosphere with pure O2 gas to eliminate the oxygen vacancies. The research results certified that the thermal treatment in the vacuum atmosphere and CO2 atmosphere could eliminate the residual closed pores and improve the transmittance of the PLMNT transparent ceramics effectively. By the improved hot-press sintering technique, the optical transmittance of the polished PLMNT transparent cer... |
| Databáze: | OpenAIRE |
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