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首页> 外文期刊>Materials Chemistry and Physics >The effect of heat-treatment on the suspension stability and gelation behavior of Li_2O-BaO-Al_2O_3-SiO_2-CaO (LBASC)
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The effect of heat-treatment on the suspension stability and gelation behavior of Li_2O-BaO-Al_2O_3-SiO_2-CaO (LBASC)

机译：热处理对Li_2O-BaO-Al_2O_3-SiO_2-CaO（LBASC）悬浮液稳定性和胶凝行为的影响

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摘要

The effect of surface-passivation of glass particulates on the gelation behavior of CaZrO_3/Li_2O-B_2O_3-Al_2O_3-SiO_2-CaO (LBASC) glass suspension was investigated in a system where organic solvents, a dispersant, and a binder were used as processing additives in the fabrication of Cu-multilayered ceramic capacitors (Cu-MLCCs) for a radio frequency (RF) module. The gelation behavior of the suspension showing the time dependency occurred due to the reaction and linkage between the hydroxyl groups in PVB and the boron ions that had dissolved from the glass surface. In order to reduce the dissolution of boron ions from the glass surface, the glass particulates were heat-treated at 500℃. The dissolution of ions from the raw glass particulates and heat-treated glass particulates was compared using inductively coupled plasma-atomic emission spec-trometry (ICP-AES) and X-ray photoelectron spectroscopy (XPS). It was found that the viscosity of the suspension prepared with the heat-treated glass was reduced compared to the viscosity of the suspension with the raw glass particulates, which indicated an alleviation of gel formation by heat-treatment. Microstructural observations also revealed that the sheet prepared from the suspension with the heat-treated glass particulates showed a more homogeneous green microstructure and higher green density than the gelled sheet prepared from the raw glass particulates.
机译：在有机溶剂，分散剂和粘合剂为加工助剂的体系中，研究了玻璃微粒的表面钝化对CaZrO_3 / Li_2O-B_2O_3-Al_2O_3-SiO_2-CaO（LBASC）玻璃悬浮液凝胶化行为的影响制造用于射频（RF）模块的铜多层陶瓷电容器（Cu-MLCC）。显示时间依赖性的悬浮液的胶凝行为是由于PVB中的羟基与从玻璃表面溶解的硼离子之间的反应和键合而发生的。为了减少硼离子从玻璃表面的溶解，对玻璃微粒进行了500℃的热处理。使用感应耦合等离子体原子发射光谱法（ICP-AES）和X射线光电子能谱（XPS）对离子从原始玻璃颗粒和热处理过的玻璃颗粒中的溶解进行了比较。已经发现，与具有未加工的玻璃颗粒的悬浮液的粘度相比，由热处理的玻璃制备的悬浮液的粘度降低，这表明减轻了通过热处理的凝胶形成。微观结构观察还表明，与由原始玻璃微粒制备的胶凝片相比，由悬浮液与热处理的玻璃微粒制备的片材显示出更均匀的绿色微观结构和更高的绿色密度。

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