Scholarlink

Abstract <p>The high-temperature behavior of lanthanum zirconate ceramics was studied depending on the conditions of La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> synthesis and sintering. Lanthanum zirconate was obtained by solid-phase synthesis, the ceramics were sintered in the temperature range of 1500–1550°C at different holding times. Thermal expansion and shrinkage activity of ceramics were studied by dilatometric analysis. Linear thermal expansion coefficients (LTECs) were determined in the temperature range of 200–1200°C during heating and cooling. The LTEC of the obtained ceramics is 9.1 × 10<sup>–6</sup> 1/K, which is significantly less than the LTEC of tetragonal zirconium dioxide doped with yttria (YSZ), 13.5 × 10<sup>–6</sup> 1/K. The LTEC decreases as the density of the ceramics increases. The microhardness of synthesized ceramics is 6.3 GPa.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The Thermal Expansion of Lanthanum Zirconate Ceramics

  • 期刊论文

  • 发表日期：

    2025年9月24日

查看全文
  • V. R. Khrustov,
  • A. S. Kaygorodov,
  • S. V. Zayats

摘要

Abstract

The high-temperature behavior of lanthanum zirconate ceramics was studied depending on the conditions of La2Zr2O7 synthesis and sintering. Lanthanum zirconate was obtained by solid-phase synthesis, the ceramics were sintered in the temperature range of 1500–1550°C at different holding times. Thermal expansion and shrinkage activity of ceramics were studied by dilatometric analysis. Linear thermal expansion coefficients (LTECs) were determined in the temperature range of 200–1200°C during heating and cooling. The LTEC of the obtained ceramics is 9.1 × 10–6 1/K, which is significantly less than the LTEC of tetragonal zirconium dioxide doped with yttria (YSZ), 13.5 × 10–6 1/K. The LTEC decreases as the density of the ceramics increases. The microhardness of synthesized ceramics is 6.3 GPa.