Expansion of phosphate-bonded investments: Part II--Thermal expansion.
Expansion of phosphate-bonded investments: Part II--Thermal expansion.
复制标题
磷酸盐保税投资的扩张：第二部分——热力扩张。
DOI：
10.1016/s0022-3913(05)80150-7
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
G. Marshall
中科院分区：
文献类型：
--
作者：
J. E. Hutton;G. Marshall
研究了磷酸盐键合包埋材料的热膨胀性能。将三种包埋剂与蒸馏水或其特殊液体混合，并允许凝结时间为1或24小时。用垂直膨胀仪测量了水化和热膨胀，并分析了相互作用和主要影响。归因于水合作用的膨胀量很小，而热膨胀则变化很大，而且幅度更大。材料I表现出最大的热膨胀。材料II和III记录了较小的热膨胀，当这些材料与其特殊液体混合时，热膨胀增加。凝结时间对水化膨胀没有实质性影响，但对热膨胀有影响，将材料加热到800°C而不是700°C并不会显著提高膨胀。
This study investigated the thermal expansion of phosphate-bonded investment materials. Three investments were mixed with either distilled water or their special liquids and allowed a setting time of 1 or 24 hours. Hydration and thermal expansions were measured with a vertical dilatometer and were analyzed for interactive and main effects. The amount of expansion attributed to hydration was minimal, whereas thermal expansions varied and were of greater magnitudes. Material I exhibited the greatest thermal expansion. Materials II and III recorded smaller thermal expansions that increased when the materials were mixed with their special liquids. Setting time did not substantially influence hydration expansions but did influence thermal expansions, and heating the materials to 800°C instead of 700°C did not dramatically elevate expansions.