TY - JOUR
T1 - Relationship between incongruent-melting langatate (La3Ta0.5Ga5.5O14) and associated phases in the system La2O3-Ga2O3-Ta2O5
AU - Kimura, Hiromitsu
AU - Uda, Satoshi
AU - Huang, Xinming
N1 - Funding Information:
This work was supported in part by Grants-in-Aid for Scientific Research (17360002) from the Ministry of Education, Science, Sports and Culture of Japan. We also would like to thank the Mitsubishi Foundation for their support.
PY - 2006/9/15
Y1 - 2006/9/15
N2 - The phase relationship between langatate (LTG, La3Ta0.5Ga5.5O14) and associated phases was studied. Equilibrium solid phase tie lines were obtained for the ternary system La2O3-Ga2O3-Ta2O5 by phase identification of sintered samples with various compositions through X-ray diffraction analysis. The solid solution range of LTG was determined in the temperature range of 1300-1350 °C. A new compound was identified that was stable above 1485 °C up to its melting point. Liquidus phases were investigated by in-situ observation of the crystallization process from melts having various compositions. Differential scanning calorimetry analysis was carried out to study the phase transitions associated with eutectic and peritectic reactions. On the basis of the results of these experiments, a primary phase diagram was established around LTG. It was concluded that LTG is an incongruent-melting compound and has a peritectic relation to LaGaO3.
AB - The phase relationship between langatate (LTG, La3Ta0.5Ga5.5O14) and associated phases was studied. Equilibrium solid phase tie lines were obtained for the ternary system La2O3-Ga2O3-Ta2O5 by phase identification of sintered samples with various compositions through X-ray diffraction analysis. The solid solution range of LTG was determined in the temperature range of 1300-1350 °C. A new compound was identified that was stable above 1485 °C up to its melting point. Liquidus phases were investigated by in-situ observation of the crystallization process from melts having various compositions. Differential scanning calorimetry analysis was carried out to study the phase transitions associated with eutectic and peritectic reactions. On the basis of the results of these experiments, a primary phase diagram was established around LTG. It was concluded that LTG is an incongruent-melting compound and has a peritectic relation to LaGaO3.
KW - A1. Phase diagrams
KW - A1. Solid solutions
KW - A2. Growth from melt
KW - B1. Oxides
KW - B2. Piezoelectric materials
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U2 - 10.1016/j.jcrysgro.2006.07.022
DO - 10.1016/j.jcrysgro.2006.07.022
M3 - Article
AN - SCOPUS:33748473354
SN - 0022-0248
VL - 295
SP - 36
EP - 43
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 1
ER -