System and method for measuring true density of powder samples under anhydrous and oxygen-free conditions

A water-free and oxygen-free measurement system technology, applied in the direction of measuring devices, specific gravity measurement, instruments, etc., can solve the problems of temperature influence, solvent, gas and other impurities pollution and deterioration, etc.
CN102297818AActive Publication Date: 2011-12-28CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2011-12-28

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Abstract

The invention discloses a system and method for measuring the true density of a powder sample in the absence of water and oxygen, relating to the technical field of density measurement of powder samples. The system comprises a closed container, wherein the closed container is respectively connected with a gas cylinder, a vacuum pump, a pressure gauge, a thermometer and a sample bottle through pipelines; a switching valve is arranged on the pipeline between the gas cylinder and the closed container; a limit valve is arranged on the pipeline between the vacuum pipe and the closed container; a seal plug is arranged on the sample bottle; and a controllable valve switch is arranged on the pipeline between the sample bottle and the closed container. According to the system and method for measuring the true density of the powder sample in the absence of water and oxygen, the true volume of the powder sample can be calculated according to the volume variation of the system before and after the sample is loaded, and the true density is obtained through calculation by combining the mass of the powder sample; the system and method disclosed by the invention are suitable for measuring the true density of the powder sample, in particular suitable for measuring the true density of the powder sample which cannot be exposed in the air; in addition, the true density of the powder can be measured under the non-room-temperature condition, and the sample is not in contact with air and water in the whole test process; and the measuring system and method disclosed by the invention have the advantages of strong practicability and convenience for operation.
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Description

technical field

[0001] The invention relates to the technical field of powder sample density measurement, in particular to a powder sample true density measurement system and a measurement method under anhydrous and oxygen-free conditions. Background technique

[0002] True density is one of the basic characteristics of powder, which refers to the ratio of powder weight to true volume, and its true volume does not include the closed space existing inside the powder particles.

[0003] At present, the methods for measuring the density of powder samples are mainly liquid immersion method and gas volume method. The liquid immersion method is to immerse the powder sample into the immersion liquid on the surface of the easily wettable powder particles, vacuum degassing to completely eliminate the air bubbles, and then measure the density of the powder sample. Excluding the volume of liquid, this method is not suitable for powder samples that are easily soluble or contain easily s...

Claims

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