CN106876234A - A kind of sample stage for the analysis of mineral facies automatic identification - Google Patents

Abstract

The invention provides a sample table for automatic identification and analysis of mineral phases, the shape of the base of the sample table matches the shape of the sample groove in the sample room of the scanning electron microscope, a sample holder is opened in the middle of the sample table, and a detachable card slot is installed in the sample holder , There are two sets of movable baffles installed in the card slot; the Co standard sample is inlaid on the side wall of the sample stage, and the upper surface of the Co standard sample is at the same level as the upper surface of the sample stage. The invention is specially made for geoscience block samples and target samples (powder mineral particles) to meet the test requirements of samples with different sizes and shapes.

Description

A sample stage for automatic identification and analysis of mineral phases

technical field

The invention relates to the field of scanning electron microscope instrument analysis and testing of geological samples, in particular to a special sample stage suitable for automatic identification of mineral phases (INCA-mineral) analysis.

Background technique

(1) Automatic mineral phase identification technology (INCA-mineral):

INCA-mineral is currently one of the most advanced mineral phase automatic identification analysis testing systems in the world. The mineral analysis software is carried on the scanning electron microscope (SEM), and the test analysis is completed through the cooperative work of the energy spectrum probe and the backscatter probe. The working principle is to distinguish different mineral phases based on backscattered images, obtain the elements of each phase through energy spectrum analysis, and then process the collected mineral features through graphics. Changes in element content are the main basis for identifying mineral types. With the support of large-area SDD energy spectrum probes, INCA-mineral technology can quickly and accurately collect the shape and composition information of each particle, carry out mineral classification and identification, and realize the automatic analysis of thousands of mineral particles per hour, making routine Transformation of the SEM into an automated mineral analysis device.

(2) INCA-mineral experiment and sample preparation

When performing INCA-mineral analysis and testing, the surface of the sample is required to be flat, perpendicular to the incident electron beam, at an angle of 90°C, and the sample particles are uniformly dispersed. Therefore, for bulk samples, the surface to be tested must first be ground and polished. For powder samples, it is necessary to put powdered mineral particles into rubber molds, inject glue and make targets. After the resin is cured, put it into an automatic metallographic polishing machine for grinding and polishing. The surface of the sample to be tested needs to be sprayed with a continuous conductive carbon film before analysis, and then loaded into the sample chamber of the scanning electron microscope for analysis. The software test needs to use Co as the energy spectrum quantitative analysis standard.

Contents of the invention

In order to solve the problems of the prior art, the present invention provides a special sample platform for INCA-mineral analysis specially made for geoscience block samples and target samples (powder mineral particles) to meet Samples of different sizes and shapes need to be tested with standard samples.

The invention provides a sample stage for automatic identification and analysis of mineral phases, which is made of pure Cu material. The shape of the base of the sample stage matches the shape of the sample groove in the sample room of the scanning electron microscope. There is a sample holder in the middle of the sample stage, and the sample holder is hollow. Cylinder, the internal size of the hollow cylinder is equivalent to the size of a standard one-inch target, and the height can meet the thickness of most targets.

A detachable and adjustable slot is installed in the sample holder for installing massive rock samples. Two sets of movable baffles are installed in the card slot, and the two sets of movable baffles are used to install massive rock samples of different sizes.

The bottom of the card slot is connected to the sample holder through adjustment screws, and at least two sets of sample fixing screws are provided on the side of the card slot to adjust the height of the sample to ensure that the upper surface of the sample is parallel to and at the same height as the upper surface of the sample stage.

The upper surface of the side wall of the sample stage is inlaid with a Co standard sample, and the upper surface of the Co standard sample is at the same level as the upper surface of the sample stage, and then at the same height as the sample surface, so that the sample can pass through at the same working distance (WD) Co standard samples for calibration.

The beneficial effect of the present invention is that it provides a special sample stage for INCA-mineral analysis specially made for geoscience block samples and target samples (powder mineral particles) to meet the requirements of different sizes and shapes. One sample needs to be tested with a standard sample.

Description of drawings

Figure 1 is a top view of the sample stage.

Fig. 2 is a top view of the slot structure.

Figure 3 is a schematic diagram of the base of the sample stage.

Figure 4 is a side view of the sample stage.

Figure 5 is a front view of the sample stage.

detailed description

The invention provides a sample stage for automatic identification and analysis of mineral phases, which is made of pure Cu material. The base of the sample stage is shown in Figure 3, and its shape matches the shape of the sample groove in the sample chamber of the scanning electron microscope. Adjustable sample holder, the sample holder is a hollow cylinder, as shown in Figure 4 and Figure 5, the internal size of the hollow cylinder is equivalent to the size of a standard one-inch target, and the height can meet the thickness of most targets.

A detachable and adjustable slot is installed in the sample holder, as shown in Figure 2, for installing massive rock samples. Two sets of movable baffles are installed in the card slot, and the two sets of movable baffles are used to install massive rock samples of different sizes.

The bottom of the card slot is connected to the sample holder through adjustment screws, and at least two sets of sample fixing screws are provided on the side of the card slot to adjust the height of the sample to ensure that the upper surface of the sample is parallel to and at the same height as the upper surface of the sample stage.

The upper surface of the side wall of the sample stage is inlaid with a Co standard sample, as shown in Figure 1, the upper surface of the Co standard sample is at the same level as the upper surface of the sample stage, and then at the same height as the sample surface, so that the samples can be placed on the same working surface. Calibration by Co standard at distance (WD).

There are many specific application approaches of the present invention, and the above description is only a preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements can also be made without departing from the principles of the present invention. Improvements should also be regarded as the protection scope of the present invention.

Claims (4)

1. it is a kind of for mineral facies automatic identification analysis sample stage, it is characterised in that：Sample stage base shape and ESEM The form fit of sample inside groove, is provided with sample carrier in the middle of sample stage, dismountable draw-in groove, draw-in groove are provided with sample carrier In two groups of moving stops are installed；Sample stage wall upper surface is inlaid with Co standard specimens, upper surface and the sample stage upper table of Co standard specimens Face is in same level.

2. it is according to claim 1 for mineral facies automatic identification analysis sample stage, it is characterised in that：Sample stage is pure Cu materials make.

3. it is according to claim 1 for mineral facies automatic identification analysis sample stage, it is characterised in that：Described sample It is hollow cylinder to hold in the palm, and one inch of target size of hollow cylinder inside dimension and standard is suitable.

4. it is according to claim 1 for mineral facies automatic identification analysis sample stage, it is characterised in that：Described draw-in groove Bottom is connected by set screw with sample carrier, and draw-in groove side is provided with least two groups sample fixed screws.