FREEZING POINTS OF HIGH-PURITY LEAD AS PRECISION TEMPERATURE STANDARDS

被引：0
|
作者：
GEORGIUSS, RS
机构：
来源：
INDIAN JOURNAL OF ENGINEERING AND MATERIALS SCIENCES | 1994年 / 1卷
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T [工业技术];
学科分类号：
08 ;
摘要：
An investigation of freezing and melting temperature of two samples of lead (purity > 99.99%) has been made. Using the induced freezing technique, plateaus of essentially constant (+/- 0.0002-degrees-C) temperature with duration of 3 h are obtained on the cooling curves of these samples. Alloy melting ranges have been measured following different types of freezing with overnight anneals near the solidus temperature. These parameters are found to be useful in the selection of the samples of the highest purity and at the same time showed that an uncertainty of 0.004-degrees-C above the value of the liquidus point may exist.
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页码：305 / 308
页数：4
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