Preparation method of pitch microsection

A technology of asphalt and thin slices, which is applied in the field of analysis of organic polymer substances, can solve the problems of troublesome preparation methods and high production costs of light slices or thin slices, and achieve the effects of low cost, good flatness and high efficiency

Inactive Publication Date: 2011-04-27
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The preparation methods of light sheets or thin sheets in the above prior art are all troublesome, and can only be

Method used

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  • Preparation method of pitch microsection

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preparation example Construction

[0033] see figure 1 , figure 1 It is a flow chart of the preparation method of asphalt microflakes of the present invention. The present invention uses coal tar pitch to heat and melt, has certain cohesiveness, and resolidifies when cooled. At this time, there is no volatilization loss, and its internal structure is not destroyed. Thin slices, that is, the present invention adopts a hot-press curing method to make thin slices, and the specific manufacturing steps are as follows.

[0034] S1, pulverize the asphalt into particles, and the particle size of each particle is less than 3mm.

[0035] S2. Weigh 4-8 mg of asphalt particles and place them on a glass slide.

[0036] S3, heating and dehydrating the glass slide with asphalt particles for 5-15 minutes, preferably at a heating temperature of 90-100°C. The heating method can be heated in an oven, and at this time, the glass slide with the asphalt particles is placed in the oven; the glass slide with the asphalt particles c...

Embodiment 1

[0049] Crush the medium-temperature asphalt to a particle size below 3mm. Weigh 4 mg of pitch particles and place on a glass slide. Put it into an oven with a set temperature of 90°C for heating and dehydration for 5 minutes. After dehydration, increase the heating temperature to 105°C to soften and melt the analysis sample. Put a cover glass on the molten sample, and add a 50g weight on top. Raise the temperature to 120° C. and keep warm for 15 minutes, then take out the slide glass and cover glass and the analysis samples between them. Slightly slide the coverslip to remove air bubbles. The sample to be analyzed is cooled into thin slices.

Embodiment 2

[0051] Crush the medium-temperature asphalt to a particle size below 3mm. Weigh 6 mg of pitch particles and place on a glass slide. Put it into an oven with a set temperature of 95°C for heating and dehydration for 8 minutes. After removing the water, increase the heating temperature to 110°C to soften and melt the analysis sample. Put a cover glass on the molten sample, and add a 20g weight on top. Raise the temperature to 130° C. and keep warm for 10 minutes, then take out the slide glass and cover glass and the analysis samples between them. Slightly slide the coverslip to remove air bubbles. The sample to be analyzed is cooled into thin slices.

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Abstract

The invention relates to a preparation method of a pitch microsection, which is a technology for preparing thin sections for microscopic analysis, and is used for solving the problems that the traditional thin section preparation method is troublesome and high in cost. In the method, the characteristics that the heated molten coal pitch has certain cohesive property, thus the volatilization loss does not exist and an internal structure is not damaged when the coal pitch is cooled and then cured are utilized to prepare the thin sections. The preparation method comprises the following specific steps: crushing pitch into particles; putting the pitch particles on a glass slide; heating the pitch particles for dehydrating; after the dehydration, rising the heating temperature so that an analytic sample is softened and melted; putting a coverslip on the analytic sample, and placing a leveling weight above the coverslip to pressurize the analytic sample, so that the analytic sample is in a thin section shape; rising the heating temperature, and stopping after carrying out heat preservation for a time; and naturally cooling the bubble-free analytic sample to obtain the thin section. he preparation method of the thin section, complex steps such as rubber mixing, slicing, grinding, polishing and the like are omitted, and the prepared polished section has the advantages of good planeness, low cost and high efficiency.

Description

technical field [0001] The invention relates to a technology for preparing thin slices for microscopic analysis, in particular, the thin slices for microscopic analysis are obtained by hot-pressing solidification, so as to be used for the analysis of organic macromolecular substances such as asphalt. Background technique [0002] Coal tar pitch is currently the only binder available for carbon material production, and its quality plays a vital role in the development and production of high-performance carbon materials and the development of the carbon material industry. At present, users have put forward requirements for indicators other than coal tar pitch standards, such as mesophase content. At about 300-500°C, asphalt-like substances will appear in the mesophase state during the pyrolysis process. With the pre-orientation of the molecules in the mesophase stage, obvious anisotropy is formed, which is a new phase formed by the polymerized condensed aromatic hydrocarbon mo...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 杜亚平
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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