Influences of refining temperatures on properties of hollow glass microspheres
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摘要: 为实现对惯性约束聚变（ICF）靶用空心玻璃微球（HGM）质量及性能的有效调控，研究了精炼温度对HGM批次产品中A级HGM百分数的影响，实验测试了不同精炼温度条件下HGM批次的平均直径和壁厚、抗张强度、对氘气的保气性能、表面粗糙度及其随时间的变化。测试结果表明：升高精炼温度并不是总有利于提高HGM的质量和性能; 当精炼温度低于1600 ℃时，满足ICF物理实验参数要求的HGM百分数随着精炼温度的增高而增加，但是，当精炼温度高于1600 ℃时，HGM的合格率则随着精炼温度的增高而显著下降; 随着精炼温度的升高，HGM的抗拉强度快速提高，表面粗糙度快速下降; HGM在室温下对氘气的阻气能力快速下降，且在大气中的潮解速率和程度显著降低。Abstract: To regulate and control the quality and properties of hollow glass microspheres (HGMs) for inertial confinement fusion (ICF) targets, we investigated the effects of refining temperatures on the percentages of qualified HGMs for ICF targets in glass shell batches. The geometry, tensile strength, permeability, surface roughness and chemical durability of HGMs produced under different refining temperatures were also tested. The results show that increasing the refining temperature is not always favorable for improving the quality and properties of resulting HGMs. When the refining temperature is lower than 1 600 ℃, the percentages of qualified HGMs for ICF targets increase with the refining temperature. When the refining temperature is higher than 1 600 ℃, the yield decreases rapidly with the further increase of the refining temperature. The tensile strength，surface roughness and hydrogen permeability of the resulting HGMs can be improved notably by increasing the refining temperature. However, the chemical durability of HGMs at ambient condition can be reduced remarkably under higher refining temperatures.
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