Synthesis and Electrical Properties of Cation Deficient Perovskite-type Oxides in the Ln-A-Ti-AI-0 System (Ln = La, Nd;A=Ca, Sr).

スポンサーリンク

概要

• 論文の詳細を見る

• The effects of ion vacancy on the crystal structure and the electrical conductivity of perovskite-type oxides were investigated. The cation and oxide ion deficient perovskite-type oxides LnA2-xTi2AlO9-d(Ln=La, Nd;A=Ca, Sr) were synthesized. Single-phase samples of LnA2-xTi2AlO9-d were prepared by heating at 1673 K in air in the compositional range of x=0-0.3 for both A = Ca and Sr. The crystal structures were cubic perovskite-type for A = Sr and orthorhombic perovskite-type for A=Ca. Lattice parameters of LnA2-xTi2AlO9-d increased with increasing amounts of A cation vacancies. All the samples exhibited semiconducting behavior in the temperature range of 573-1023 K in air. The measurements of conductivity for LnA2-xTi2AlO9-d as a function of oxygen partial pressure revealed n-type conductivity at oxygen partial pressure less than 0.21 arm. The conductivities of LnA2-xTi2AlO9-d increased with increasing amount of A cation and oxide ion vacancies for both A=Ca and Sr.

著者

• Kato Sumio

  Faculty Of Engineering And Resourse Science Akita University

• MATSUKI Yukio

  Faculty of Engineering and Resourse Science, Akita University

• MARUYAMA Takahiro

  Faculty of Engineering and Resourse Science, Akita University

• Maruyama Takahiro

  Faculty Of Engineering And Resourse Science Akita University

• Matsuki Yukio

  Faculty Of Engineering And Resourse Science Akita University

• MatsukiI Yukio

  Faculty of Engineering and Resourse Science, Akita University

関連論文

• Synthesis and Electrical Properties of Cation Deficient Perovskite-type Oxides in the Ln-A-Ti-AI-0 System (Ln = La, Nd;A=Ca, Sr).
• EXAFS and XRD Studies on Nb-Mesostructured Materials Prepared from Layered-Perovskite Type Potassium Niobium Oxyfluoride
• Synthesis of Mesostructured Materials Using Nb-containing Layered Perovskites and Cationic Surfactants
• Synthesis and Properties of Nb-containing Mesoporous Materials with Bimodal Pores Using TEOS and Layered Perovskite K_2NbO_3F
• Synthesis of Mesostructured Materials from K_2NbO_3F as Starting Material
• X-ray Photoemission Spectroscopy Study of GaAs(111)B Substrate Nitridation using an RF-Radical Source
• Precise Control of Vertical-Cavity Surface-Emitting Laser Structural Growth Using Molecular Beam Epitaxy In Situ Reflectance Monitor
• X-ray Photoemission Spectroscopy Study of Low-Temperature Nitridation of GaAs(001) Surface Using RF Radical Source

スポンサーリンク