Effect of Al2O3 dopant on abnormal grain growth in BaTiO3

Fisher, John G.; Lee, Byong-Ki; Brancquart, Antoine; Choi, Si‐Young; Kang, Suk–Joong L.

doi:10.1016/j.jeurceramsoc.2005.03.065

Cited by 19 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Fisher et al ., 11 excess TiO 2 and inhomogeneities of additives promoted abnormal grain growth in BaTiO 3 . However, no new phases and abnormal grain growth occurred in 3.5 and 5.0 mol% Mg‐doped samples.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Photoluminescence Properties of Mg‐Doped BaTiO₃:Pr³⁺ Phosphor

Fukuda

Takebe

Kuwabara

2007

Journal of the American Ceramic Society

View full text Add to dashboard Cite

The photoluminescence of Mg‐doped BaTiO3:Pr3+ (Pr3+: 0.1 mol%) ceramics was investigated by changing the doping concentration of Mg and the sintering temperature. The results indicated that the intensity of red emission due to the 1D2→3H4 transition of Pr3+ exhibited significant dependence on both the Mg doping content and the sintering temperature; the strongest red emission intensity was observed for 2.0 mol% Mg‐doped ceramics sintered at 1050°C. An interpretation of the results obtained was made in terms of the changes in the crystal structure and microstructure of the ceramics.

show abstract

Section: Resultsmentioning

confidence: 99%

Microstructure and Photoluminescence Properties of Mg‐Doped BaTiO₃:Pr³⁺ Phosphor

Fukuda

Takebe

Kuwabara

2007

Journal of the American Ceramic Society

View full text Add to dashboard Cite

show abstract

“…4(a)), the grain has the angular shape with the flat surface, which is typically observed in the microstructure with abnormal grain growth (AGG). It is generally agreed that AGG is caused by the existence of a liquid phase [21][22][23]. Zhen et al [23] found that extensive AGG occurred on the (Li 0.04 K 0.44 Na 0.52 )NbO 3 and (Li 0.04 K 0.44 Na 0.52 )(Nb 0.85 Ta 0.15 )O 3 ceramics and concluded that the volatilization of alkali components was responsible for the occurrence of AGG.…”

Section: Resultsmentioning

confidence: 99%

Normal sintering and electric properties of (K,Na,Li)(Nb,Sb)O3 lead-free piezoelectric ceramics

Zhang

Shen²,

et al. 2011

J Electroceram

View full text Add to dashboard Cite

0.94(K 05 Na 0.5 )NbO 3 −0.03LiNbO 3 −0.03LiSbO 3 (KNLNS) lead-free piezoelectric ceramics were prepared by conventional mixed oxide route with normal sintering method. The samples were sintered at different temperatures with KNLNS powder atmosphere to prevent volatilization of alkali metal oxides at high temperature. The effects of sintering temperature on the density, structure and electric properties of KNLNS ceramics were studied. X-ray diffraction (XRD) results showed that the crystal structure of the crushed KNLNS ceramic powders were pure perovskite phase with tetragonal phase structure when sintered at T≤1080°C. However a K 3 Li 2 Nb 5 O 15 phase with tetragonal tungsten bronze structure began to appear when the sintering temperature was higher than 1080°C. The optimum sintering temperature was 1080°C which was determined by measuring the density of the samples. Scanning electron microscope (SEM) observation indicated that the sintering temperature had a great effect on the microstructure of the samples. The KNLNS ceramics under the optimum sintering temperature showed excellent electric properties: ρ=4.29 g/cm 3 , ε r =826, tanδ=0.049, d 33 =190 pC/N, k p =0.30, and T c =385°C. The results show that the KNLNS ceramics are promising candidate for lead-free piezoelectric ceramics.

show abstract

“…In this work, we shall study the effect of Al 2 O 3 additions on abnormal grain growth in BaTiO 3 sintered above the BaTiO 3 –Ba 6 Ti 17 O 40 eutectic temperature. The affect of Al 2 O 3 on abnormal grain growth in BaTiO 3 samples sintered below the eutectic temperature has been described in a previous paper 22 …”

Section: Introductionmentioning

confidence: 89%

Abnormal Grain Growth in Barium Titanate Doped with Alumina

Fisher

Choi

Kang

2006

Journal of the American Ceramic Society

Self Cite

View full text Add to dashboard Cite

The effect of additions of ≤1 mol% Al2O3 on abnormal grain growth in BaTiO3 sintered for periods of ≤60 min at 1350°C has been studied. Addition of ≤0.2 mol% Al2O3 caused an increase in the nucleation and growth rates of abnormal grains, with further additions causing a decrease. This behavior is explained by interface‐controlled growth. Dopant adsorption reduces both the edge free energy and the step velocity of a grain, causing the nucleation and growth rates of abnormal grains to increase, pass through a maximum, and then decrease with increasing dopant concentration.

show abstract

Effect of Al2O3 dopant on abnormal grain growth in BaTiO3

Cited by 19 publications

References 12 publications

Microstructure and Photoluminescence Properties of Mg‐Doped BaTiO₃:Pr³⁺ Phosphor

Microstructure and Photoluminescence Properties of Mg‐Doped BaTiO₃:Pr³⁺ Phosphor

Normal sintering and electric properties of (K,Na,Li)(Nb,Sb)O3 lead-free piezoelectric ceramics

Abnormal Grain Growth in Barium Titanate Doped with Alumina

Contact Info

Product

Resources

About

Effect of Al2O3 dopant on abnormal grain growth in BaTiO3

Cited by 19 publications

References 12 publications

Microstructure and Photoluminescence Properties of Mg‐Doped BaTiO3:Pr3+ Phosphor

Microstructure and Photoluminescence Properties of Mg‐Doped BaTiO3:Pr3+ Phosphor

Normal sintering and electric properties of (K,Na,Li)(Nb,Sb)O3 lead-free piezoelectric ceramics

Abnormal Grain Growth in Barium Titanate Doped with Alumina

Contact Info

Product

Resources

About

Microstructure and Photoluminescence Properties of Mg‐Doped BaTiO₃:Pr³⁺ Phosphor

Microstructure and Photoluminescence Properties of Mg‐Doped BaTiO₃:Pr³⁺ Phosphor