Method for measuring X-ray scattering of liquid

Abstract

The invention relates to a method for measuring X-ray scattering of liquid. The method comprises the following steps of: (1) connecting a liquid X-ray scattering sample cell in which a to-be-tested liquid sample is arranged with a circulating constant-temperature water bath, fixing the sample cell on an infrared remote control sample table of an X-ray diffractometer; (2) adjusting a light path system through a remote control device/remote controller of the infrared remote control sample table according to a common operation method of a diffractometer light path system, so as to determine a proper position for installation of the sample cell; (3) adopting Mo Kalpha as a radiation source and a super detector receiving system to carry out piecewise overlapping measurement in an X-ray scattering test measurement; and (4) carrying out data treatment and calculation, namely adopting universal Origin program on all data obtained by the measured liquid sample, firstly, correcting the data, secondly, carrying out normalization and calculating a scale factor by combining an integral method with an angle method, and finally providing relevant parameters describing a liquid space structure by calculation. The method can be applied to liquid scattering measurement experiment and data analysis; and the measurement time is effectively shortened.

Description

technical field [0001] The invention relates to the technical field of scattering experiments of liquid structures, in particular to a liquid X-ray scattering measurement method. Background technique [0002] Liquids have short-range order and long-range disorder. Therefore, its structure measurement should not only rely on modern scattering experiment technology but also combine computer data processing technology. On the basis of the structure information obtained directly from the experiment, the spatial structure parameters such as the bond length, coordination number, and bond angle of the first and second coordination layers are calculated through theoretical models. The solution structure parameters and radial distribution function are not only the indispensable basis for the development of the two types of solution theories, the lattice model and the radial distribution function model, but also the research on the phase equilibrium and metastable phase equilibrium o...

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Problems solved by technology

Strictly speaking, the ordinary diffractometer light source is a divergent light source, and it is generally difficult to obtain an accurate radial distribution function for measured liquid scattering.

[0006] From the perspective of liquid scattering experiment sample storage, there are also methods of using capillary tubes to store liquid abroad, which are limited to liquid samples that are not affected by solubility and measured at room temperature.

[0007] Since all existing X-ray diffractometers are neither equipped with sample cells for liquid measurement, nor have corresponding liquid measurement programs and data processing software been installed

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