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<p>The growing accumulation of electronic waste underscores the urgent need for sustainable materials in eco–friendly electronics packaging.&#xa0;This study address the limitations of conventional LTCC ceramics in environmental degradability, which hinder efficient e–waste recycling.&#xa0;We develop degradable RO (R=Ba, Sr)–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub>–B<sub>2</sub>O<sub>3</sub> (RASB) glass–ceramics by incorporating Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> into BaO/SrO–B<sub>2</sub>O<sub>3</sub> systems, targeting a balance between controlled degradation and LTCC compatibility. Structural analyses (FTIR/XRD) show that Al<sub>2</sub>O<sub>3</sub> stabilizes the network via [AlO<sub>4</sub>] tetrahedra, while SiO<sub>2</sub> promotes depolymerization by converting [BO<sub>4</sub>] to [BO<sub>3</sub>] units, accelerating degradation in organic acids. Mutual substitution of Ba<sup>2+</sup>/Sr<sup>2+</sup>&#xa0;modulates sintering behavior: Ba<sup>2+</sup>&#xa0;reduces melting temperatures but weakens network stability, whereas Sr<sup>2+</sup>&#xa0;enhances rigidity. Degradation tests reveal that higher Ba<sup>2+</sup>&#xa0;content significantly increases mass loss due to ionic radius differences and lattice distortion. Optimized BSASB glass–ceramics exhibit tunable dielectric performance, enhanced mechanical strength, and adjustable thermal expansion behavior. These materials achieve controlled degradation in mild acidic environments while maintaining compatibility with LTCC requirements. This design enables direct application in recycling LTCC–based electronic packaging, offering a closed–loop solution to mitigate e–waste accumulation. This work establishes a design framework for eco–responsive ceramics, advancing sustainable electronics by integrating environmental degradability with functional performance.</p>

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Study on the degradation behavior of RO (R=Ba, Sr)–Al2O3–SiO2–B2O3 glass–ceramics in various natural organic acid solutions

  • 期刊论文

  • 发表日期：

    2025年5月28日

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  • Feng–Zhuo Deng,
  • Yu–Xia Lin,
  • Bao–Xing Liu,
  • Wan–Lun Ren,
  • Song Chen

摘要

The growing accumulation of electronic waste underscores the urgent need for sustainable materials in eco–friendly electronics packaging. This study address the limitations of conventional LTCC ceramics in environmental degradability, which hinder efficient e–waste recycling. We develop degradable RO (R=Ba, Sr)–Al2O3–SiO2–B2O3 (RASB) glass–ceramics by incorporating Al2O3/SiO2 into BaO/SrO–B2O3 systems, targeting a balance between controlled degradation and LTCC compatibility. Structural analyses (FTIR/XRD) show that Al2O3 stabilizes the network via [AlO4] tetrahedra, while SiO2 promotes depolymerization by converting [BO4] to [BO3] units, accelerating degradation in organic acids. Mutual substitution of Ba2+/Sr2+ modulates sintering behavior: Ba2+ reduces melting temperatures but weakens network stability, whereas Sr2+ enhances rigidity. Degradation tests reveal that higher Ba2+ content significantly increases mass loss due to ionic radius differences and lattice distortion. Optimized BSASB glass–ceramics exhibit tunable dielectric performance, enhanced mechanical strength, and adjustable thermal expansion behavior. These materials achieve controlled degradation in mild acidic environments while maintaining compatibility with LTCC requirements. This design enables direct application in recycling LTCC–based electronic packaging, offering a closed–loop solution to mitigate e–waste accumulation. This work establishes a design framework for eco–responsive ceramics, advancing sustainable electronics by integrating environmental degradability with functional performance.