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Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres
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| Zeitschriftentitel: | Journal of the American Ceramic Society |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Journal of the American Ceramic Society, 84, 2001, 7, S. 1465-1469 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Wiley
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| Schlagwörter: |
| author_facet |
Choi, Jong‐Jin Ryu, Jungho Kim, Hyoun‐Ee Choi, Jong‐Jin Ryu, Jungho Kim, Hyoun‐Ee |
|---|---|
| author |
Choi, Jong‐Jin Ryu, Jungho Kim, Hyoun‐Ee |
| spellingShingle |
Choi, Jong‐Jin Ryu, Jungho Kim, Hyoun‐Ee Journal of the American Ceramic Society Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres Materials Chemistry Ceramics and Composites |
| author_sort |
choi, jong‐jin |
| spelling |
Choi, Jong‐Jin Ryu, Jungho Kim, Hyoun‐Ee 0002-7820 1551-2916 Wiley Materials Chemistry Ceramics and Composites http://dx.doi.org/10.1111/j.1151-2916.2001.tb00861.x <jats:p>Transparent lanthanum‐doped lead zirconate titanate (PLZT) ceramics were fabricated by air‐pressure sintering. When the PLZT (9/65/35) specimens were sintered in air, the microstructure was not uniform throughout the body; the outer region near the surface was completely dense, while the inner region of the body was porous. The thickness of the outer dense layer increased parabolically with sintering time. When the specimen was sintered in air at 1200°C for 8 h, the thickness of the dense layer was ∼0.25 mm. Therefore, when the specimen had a thickness of <0.5 mm, it was dense and transparent. This difference in microstructure was attributed to the formation of lattice vacancies as a result of PbO evaporation from the surface. The sintering atmosphere also was important in determining the thickness of the dense layer. The thickness was strongly dependent on the oxygen partial pressure of the atmosphere. The oxygen‐gas trapped in pores was deemed to migrate easily through the lattice vacancies. By sintering in an oxygen‐gas atmosphere at 1200°C for 8 h, a transparent PLZT with thickness up to 2 mm was fabricated.</jats:p> Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres Journal of the American Ceramic Society |
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| title |
Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_unstemmed |
Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_full |
Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_fullStr |
Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_full_unstemmed |
Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_short |
Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_sort |
microstructural evolution of transparent plzt ceramics sintered in air and oxygen atmospheres |
| topic |
Materials Chemistry Ceramics and Composites |
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http://dx.doi.org/10.1111/j.1151-2916.2001.tb00861.x |
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2001 |
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1465-1469 |
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<jats:p>Transparent lanthanum‐doped lead zirconate titanate (PLZT) ceramics were fabricated by air‐pressure sintering. When the PLZT (9/65/35) specimens were sintered in air, the microstructure was not uniform throughout the body; the outer region near the surface was completely dense, while the inner region of the body was porous. The thickness of the outer dense layer increased parabolically with sintering time. When the specimen was sintered in air at 1200°C for 8 h, the thickness of the dense layer was ∼0.25 mm. Therefore, when the specimen had a thickness of <0.5 mm, it was dense and transparent. This difference in microstructure was attributed to the formation of lattice vacancies as a result of PbO evaporation from the surface. The sintering atmosphere also was important in determining the thickness of the dense layer. The thickness was strongly dependent on the oxygen partial pressure of the atmosphere. The oxygen‐gas trapped in pores was deemed to migrate easily through the lattice vacancies. By sintering in an oxygen‐gas atmosphere at 1200°C for 8 h, a transparent PLZT with thickness up to 2 mm was fabricated.</jats:p> |
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| author | Choi, Jong‐Jin, Ryu, Jungho, Kim, Hyoun‐Ee |
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| description | <jats:p>Transparent lanthanum‐doped lead zirconate titanate (PLZT) ceramics were fabricated by air‐pressure sintering. When the PLZT (9/65/35) specimens were sintered in air, the microstructure was not uniform throughout the body; the outer region near the surface was completely dense, while the inner region of the body was porous. The thickness of the outer dense layer increased parabolically with sintering time. When the specimen was sintered in air at 1200°C for 8 h, the thickness of the dense layer was ∼0.25 mm. Therefore, when the specimen had a thickness of <0.5 mm, it was dense and transparent. This difference in microstructure was attributed to the formation of lattice vacancies as a result of PbO evaporation from the surface. The sintering atmosphere also was important in determining the thickness of the dense layer. The thickness was strongly dependent on the oxygen partial pressure of the atmosphere. The oxygen‐gas trapped in pores was deemed to migrate easily through the lattice vacancies. By sintering in an oxygen‐gas atmosphere at 1200°C for 8 h, a transparent PLZT with thickness up to 2 mm was fabricated.</jats:p> |
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| imprint_str_mv | Wiley, 2001 |
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| spelling | Choi, Jong‐Jin Ryu, Jungho Kim, Hyoun‐Ee 0002-7820 1551-2916 Wiley Materials Chemistry Ceramics and Composites http://dx.doi.org/10.1111/j.1151-2916.2001.tb00861.x <jats:p>Transparent lanthanum‐doped lead zirconate titanate (PLZT) ceramics were fabricated by air‐pressure sintering. When the PLZT (9/65/35) specimens were sintered in air, the microstructure was not uniform throughout the body; the outer region near the surface was completely dense, while the inner region of the body was porous. The thickness of the outer dense layer increased parabolically with sintering time. When the specimen was sintered in air at 1200°C for 8 h, the thickness of the dense layer was ∼0.25 mm. Therefore, when the specimen had a thickness of <0.5 mm, it was dense and transparent. This difference in microstructure was attributed to the formation of lattice vacancies as a result of PbO evaporation from the surface. The sintering atmosphere also was important in determining the thickness of the dense layer. The thickness was strongly dependent on the oxygen partial pressure of the atmosphere. The oxygen‐gas trapped in pores was deemed to migrate easily through the lattice vacancies. By sintering in an oxygen‐gas atmosphere at 1200°C for 8 h, a transparent PLZT with thickness up to 2 mm was fabricated.</jats:p> Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres Journal of the American Ceramic Society |
| spellingShingle | Choi, Jong‐Jin, Ryu, Jungho, Kim, Hyoun‐Ee, Journal of the American Ceramic Society, Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres, Materials Chemistry, Ceramics and Composites |
| title | Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_full | Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_fullStr | Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_full_unstemmed | Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_short | Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| title_sort | microstructural evolution of transparent plzt ceramics sintered in air and oxygen atmospheres |
| title_unstemmed | Microstructural Evolution of Transparent PLZT Ceramics Sintered in Air and Oxygen Atmospheres |
| topic | Materials Chemistry, Ceramics and Composites |
| url | http://dx.doi.org/10.1111/j.1151-2916.2001.tb00861.x |