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<p>Focusing on the ultralow expansion functionality of the crystalized glass containing the cordierite crystal phase with the molar composition 20.7MgO·20.7Al<sub>2</sub>O<sub>3</sub>·51.6SiO<sub>2</sub>·7.0TiO<sub>2</sub>, we systematically investigated impacts of thermal treatment protocols on <i>T</i> dependence of coefficients of thermal expansion (<i>CTE</i>). Except for the phase compositions, morphology is identified as another important factor to control the <i>T</i> dependence of <i>CTE</i>. By using X-ray diffraction and scanning electron microscope, various modes of <i>T</i> dependence of <i>CTE</i> for crystallized glasses are ascribed to their different phase compositions and microstructure with finely dispersed nanoparticles. These understanding contributes to the further modification of <i>CTE</i> of the crystalized glass by altering their thermal treatment scenarios.</p>

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Tuning the Coefficients of Thermal Expansion of the Crystallized Cordierite Glasses by Thermal Treatment Protocols

  • 期刊论文

  • 发表日期：

    2025年10月29日

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  • Qiang Duan,
  • Xuefei Ke,
  • Ang Qiao,
  • Haizheng Tao

摘要

Focusing on the ultralow expansion functionality of the crystalized glass containing the cordierite crystal phase with the molar composition 20.7MgO·20.7Al2O3·51.6SiO2·7.0TiO2, we systematically investigated impacts of thermal treatment protocols on T dependence of coefficients of thermal expansion (CTE). Except for the phase compositions, morphology is identified as another important factor to control the T dependence of CTE. By using X-ray diffraction and scanning electron microscope, various modes of T dependence of CTE for crystallized glasses are ascribed to their different phase compositions and microstructure with finely dispersed nanoparticles. These understanding contributes to the further modification of CTE of the crystalized glass by altering their thermal treatment scenarios.