Scholarlink

<p>Calcium magnesium phosphosilicate glasses doped with TiO<sub>2</sub> with nominal composition 30 CaO–(20–Y) MgO–YTiO<sub>2</sub>–5P<sub>2</sub>O<sub>5</sub>–45SiO<sub>2</sub> (mole%, <i>Y</i> = 0, 1, 2, 4, and 6&#xa0;mol&#xa0;%) were prepared via the melt quenching. Addition of TiO<sub>2</sub> promotes the formation of Ti–O–Ti and/or Si–O–Ti linkages that increases the glass network compactness, and leads to clear improvements in mechanical properties (higher modulus and hardness) and dielectric performance (higher <i>ε</i>′ with low loss and a new localized relaxation). The elastic modulus rises with Ti due to stronger bonding and reduced free volume. The real permittivity (<i>ε</i>′) increases with Ti content and temperature, while dielectric loss (<i>ε</i>″) decreases at low frequency and a mid-frequency relaxation (10–100&#xa0;kHz) grows stronger with Ti. Conductivity falls with Ti addition as long-range ion motion is suppressed and charge carriers become more localized. The Ti-doped phosphosilicate glasses are lead-free and show stable, tunable dielectric behavior suitable for capacitors, insulating layers, and energy-storage devices.</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

Influence of Ti4+ on structure, mechanical, and dielectric performance of sustainable, lead-free CaO–MgO–P2O5–SiO2 glasses for energy storage

  • 期刊论文

  • 发表日期：

    2026年2月25日

查看全文
  • A. G. Darwish,
  • Mohamed I. Farouk,
  • Mostafa I. Abdelglil,
  • H. A. Abo-Mosallam

摘要

Calcium magnesium phosphosilicate glasses doped with TiO2 with nominal composition 30 CaO–(20–Y) MgO–YTiO2–5P2O5–45SiO2 (mole%, Y = 0, 1, 2, 4, and 6 mol %) were prepared via the melt quenching. Addition of TiO2 promotes the formation of Ti–O–Ti and/or Si–O–Ti linkages that increases the glass network compactness, and leads to clear improvements in mechanical properties (higher modulus and hardness) and dielectric performance (higher ε′ with low loss and a new localized relaxation). The elastic modulus rises with Ti due to stronger bonding and reduced free volume. The real permittivity (ε′) increases with Ti content and temperature, while dielectric loss (ε″) decreases at low frequency and a mid-frequency relaxation (10–100 kHz) grows stronger with Ti. Conductivity falls with Ti addition as long-range ion motion is suppressed and charge carriers become more localized. The Ti-doped phosphosilicate glasses are lead-free and show stable, tunable dielectric behavior suitable for capacitors, insulating layers, and energy-storage devices.