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O Archimedesie i jego niektórych odkryciach

Bagiński Czesław

MINUT Matematyka i Informatyka na Uczelniach Technicznych

2021

Nr 3

74-86

W artykule opisano burzliwe dzieje dokumentów zawierających odkrycia Archimedesa, w szczególności słynnego Palimpsestu, a także wybrane osiągnięcia tego wielkiego uczonego.

Density of tin, silver and copper

Korobeinikov I. I., Chebykin D., Yu X., Seetharaman S., Volkova O.

Archives of Materials Science and Engineering

2018

Vol. 92, nr 1

28--32

Purpose: Purpose of this paper is to report on tine development of a new density measurement cell. Design/methodology/approach: Measurement cell based on Archimedean principle and consisting of induction furnace and a high/precision balance was applied for measurement of tin, silver and copper density. Findings: It was found that new cell is suitable for high temperature measurement of liquid metals density at temperatures from 700 to 1520°C. Measurement results are in a good agreement with the literature values. Density deviates by 0.5-1% depending on the metal. Research limitations/implications: Accuracy of tines density measurement decreases ait temperatures below 700°C due to oxidation of the melt surface. More accurate data on thermal expansion coefficient for sinker material is required. Practical implications: Experiments showed applicability of the new measurement cell. Archimedean principle is among the most sensitive density measurement techniques. New cell will be further used for measurement of iron-based alloys. Problems of measurements are discussed. Originality/value: Paper describes application of the known density measurement technique. The paper is of interest for the material scientists working with high-temperature thermophysical properties measurements and users of thermophysical properties data.