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Na0.5Bi0.5TiO3-BaTiO3 계에서 입자성장 및 고상단결정성장에 미치는 a2CO3 첨가 효과Effect of Na2CO3 Addition on Grain Growth Behavior and Solid-state Single Crystal Growth in the Na0.5Bi0.5TiO3-BaTiO3 System
- Other Titles
- Effect of Na2CO3 Addition on Grain Growth Behavior and Solid-state Single Crystal Growth in the Na0.5Bi0.5TiO3-BaTiO3 System
- Authors
- 문경석
- Issue Date
- 2018
- Publisher
- 한국분말재료학회
- Keywords
- Grain growth; abnormal grain growth; mixed control; solid-state single crystal growth
- Citation
- 한국분말재료학회지, v.25, no.2, pp 104 - 108
- Pages
- 5
- Indexed
- KCI
- Journal Title
- 한국분말재료학회지
- Volume
- 25
- Number
- 2
- Start Page
- 104
- End Page
- 108
- ISSN
- 2799-8525
- Abstract
- Grain-growth behavior in the 95Na1/2Bi1/2TiO3-5BaTiO3 (mole fraction, NBT-5BT) system has been investigated with the addition of Na2CO3. When Na2CO3 is added to NBT-5BT, the growth rate is higher than desired and grains are already impinging each other during the initial stage of sintering. The grain size decreases as the sintering temperature increases. With the addition of Na2CO3, a liquid phase infiltrates the interfaces between grains during sintering. The interface structure can be changed to be more faceted and the interface migration rate can increase due to fast material transport through the liquid phase. As the sintering temperature increases, the impingement of abnormal grains increases because the number of abnormal grains increases. Therefore, the average grain size of abnormal grains can be decreased as the temperature increases. The phenomenon can provide evidence that grain coarsening in NBT-
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