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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Development of zirconia-glass ionomer cement composites
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Development of zirconia-glass ionomer cement composites

机译：氧化锆玻璃离聚物水泥复合材料的开发

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Yttria stabilized zirconia (YSZ) powders were used for the replacement of amalgam alloy in Miracle Mix on a volume basis, in order to improve the mechanical properties of the cements. Two types of YSZ powders were used in this study, i.e., nano-sized (5-15 nm) and micro-sized (2-10 mu m) YSZ. The effects of YSZ powders substituted within glass ionomer cement (GIC) were investigated based on their microhardness, compressive strength and diametral tensile strength. The effects of the particle size of YSZ powders on the mechanical properties of YSZ-GIC composites were also studied. The YSZ-GIC composites were soaked in distilled water for I day and I week before the mechanical testing. The mechanical properties of Miracle Mix samples were used for comparison. Results showed that the glass and YSZ particles were distributed uniformly in the matrix of GIC. YSZ-GIC composites had better mechanical properties than Miracle Mix samples. The mechanical properties of YSZ-GIC composites increased with increasing soaking time due to the continuous formation of aluminium salt bridges, which improved the strength of the cements. The micro-sized YSZ/glass powders revealed a bimodal particle size distribution and this ensured a high packing density of glass ionomer cements, giving relatively high mechanical properties of YSZ-GIC composites. YSZ-GIC composites prepared by the nano-sized YSZ powders showed low values of mechanical properties because of the low packing density of the nano-sized powders and hence low powder/liquid ratio of GIC. (c) 2005 Elsevier B.V. All rights reserved.
机译：氧化钇稳定的氧化锆（YSZ）粉末用于替代Miracle Mix中的汞合金，以提高水泥的机械​​性能。这项研究中使用了两种类型的YSZ粉末，即纳米级（5-15 nm）和微米级（2-10μm）YSZ。根据YSZ粉末的显微硬度，抗压强度和径向拉伸强度，研究了它们在玻璃离聚物水泥（GIC）中的替代效果。还研究了YSZ粉末粒径对YSZ-GIC复合材料力学性能的影响。在机械测试前一天和一周内，将YSZ-GIC复合材料浸泡在蒸馏水中。奇迹混合物样品的机械性能用于比较。结果表明，玻璃和YSZ颗粒均匀分布在GIC的基体中。 YSZ-GIC复合材料具有比Miracle Mix样品更好的机械性能。由于铝盐桥的不断形成，YSZ-GIC复合材料的机械性能随着浸泡时间的增加而增加，从而提高了水泥的强度。微米级的YSZ /玻璃粉末显示出双峰粒度分布，从而确保了玻璃离聚物胶粘剂的高堆积密度，从而赋予了YSZ-GIC复合材料较高的机械性能。由纳米级YSZ粉末制备的YSZ-GIC复合材料由于纳米级粉末的低填充密度和因此低的GIC的粉/液比而显示出低的机械性能值。 （c）2005 Elsevier B.V.保留所有权利。

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