This work illustrates the strong effects of Ti⁴⁺ and Zr⁴⁺ (M⁴⁺) on nucleation ability of SiO₂-MgO-Al₂O₃-B₂O₃-K₂O-F glass-ceramic sealant. An addition of such 5 wt.% M⁴⁺ content caused a slight increase in density value (2.60–2.61 g.cm⁻³). X-ray diffraction (XRD) experiment revealed no indication of any crystallinity in melt-quenched glass-sealant and that was further confirmed from transmission electron microscopy. XRD established the development of multicrystalline phases in investigated glass-sealants at solid oxide fuel cell (SOFC) operation temperature (=800 °C). The reflected XRD peaks on the heat-treated (i.e., 800 °C) SiO₂-MgO-Al₂O₃-B₂O₃-K₂O-F glasses were indexed as norbergite (Mg₂SiO₄.MgF₂), humite [Mg₇F₂(SiO₄)₃], chondrodite [Mg₅F₂(SiO₄)₂], mullite (3Al₂O₃·2SiO₂) and enstatite (MgSiO₃) phases. Field-emission scanning electron microscope (FESEM) experiment indicated that the plate-like crystallite particles (size 3–10 μm) were precipitated in a mother glass matrix heated at 800 °C and restructured into droplet-type morphology when nucleation was supported by Ti⁴⁺ ions. The presence of Zr⁴⁺ ion results an interlocked type microstructure that is desirable for sealing application because of their capability to resist the growth of a microcrack caused due to thermal stress. A wide thermal expansion value (=11.06 × 10⁻⁶/K) compatible with SOFC components (electrode, electrolyte, interconnect, and so on) is achieved for Zr⁴⁺-doped SiO₂-MgO-Al₂O₃-B₂O₃-K₂O-F glass-ceramic. No considerable deformation in thermal expansion value up to 10 thermal cycling operations is obtained for Zr⁴⁺ doped glass and this is ascribed to the interlocked type morphology (FESEM).

这项工作说明了Ti ⁴⁺和Zr ⁴⁺（M ⁴⁺）对SiO ₂ -MgO-Al ₂ O ₃ -B ₂ O ₃ -K ₂ O-F玻璃陶瓷密封胶的成核能力的强大影响。添加这样的5 wt。％M ⁴⁺含量会导致密度值略有增加（2.60–2.61 g.cm ^-3）。X射线衍射（XRD）实验表明，在熔融淬火的玻璃密封剂中没有任何结晶迹象，这已由透射电子显微镜进一步证实。XRD建立了固态氧化物燃料电池（SOFC）工作温度（= 800°C）下的玻璃密封剂中多晶相的开发。在经过热处理（即800°C）的SiO ₂ -MgO-Al ₂ O ₃ -B ₂ O ₃ -K ₂ O-F玻璃上反射的XRD峰被标记为水钠钙石（Mg ₂ SiO ₄ .MgF ₂） [Mg ₇ F ₂（SiO ₄）₃]，长方晶石[Mg ₅ F ₂（SiO ₄）₂ ]，莫来石（3Al ₂ O ₃ ·2SiO ₂）和顽辉石（MgSiO ₃）相。场发射扫描电子显微镜（FESEM）实验表明，板状微晶颗粒（尺寸3–10μm）在加热至800°C的母玻璃基质中沉淀，并在Ti支撑成核时重组为液滴型形态。⁴⁺离子。Zr ⁴⁺的存在离子产生互锁型微结构，这对于密封应用是理想的，因为它们具有抵抗由于热应力引起的微裂纹生长的能力。对于Zr ⁴⁺掺杂的SiO ₂ -MgO-Al ₂ O ₃ -B _2，可以实现与SOFC组件（电极，电解质，互连等）兼容的宽热膨胀值（= 11.06×10 ^-6 / K）。O ₃ -K ₂ O-F玻璃陶瓷。对于掺杂Zr ^4+的玻璃，^在进行多达10次热循环操作时，没有获得明显的热膨胀变形，这归因于互锁型形态（FESEM）。