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Metallic film test piece and its preparing method for estimating and screening museum exhibition stuff

A metal film and museum technology, which is applied in the preparation of test samples, analysis materials, measuring devices, etc. problems, to shorten the evaluation time, facilitate effective standardization, and reduce the amount of use

Inactive Publication Date: 2008-01-23
FUDAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the grinding process of metal flakes, it will cause loss of metal raw materials and affect the smoothness and flatness of the metal test piece surface. The pits or deep traces that cannot be ground away can no longer be used); the grinding process will also introduce impurities into the metal surface
For this reason, in the traditional Oddy Test procedure, the polished metal test piece is usually slightly shaken and washed in optically pure acetone. Not only does high-purity and high-priced acetone be used, but surface impurities may still remain, which will affect the collection and exhibition of cultural relics. The evaluation results of the material; the nylon wire is used to connect the metal test piece to hang in the airtight glass test tube, which is not conducive to the fixation of the test piece in the glass test tube, etc.

Method used

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  • Metallic film test piece and its preparing method for estimating and screening museum exhibition stuff
  • Metallic film test piece and its preparing method for estimating and screening museum exhibition stuff

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Substrate: Glass disc

[0031] Target material for coating: silver with a purity of ≥99.9%

[0032] Coating equipment: Take the DMD-450 optical multilayer coating machine produced by Beijing Instrument Factory as an example

[0033] Film thickness control: 0.4g / 100 glass discs

[0034] Coating process: Open the vacuum chamber of the coating machine, attach 100 glass wafers to the special bracket of the coating machine through high-temperature tape, put the surface into the coating machine after cleaning, and put 0.4g of silver with a purity of ≥99.9% In the evaporation parts. Close the vacuum chamber and evacuate to 1×10 -5 Torr, then began to vaporize. The coating time is about 30-60 minutes. After opening the vacuum chamber, the prepared test piece can be removed and vacuum packaged. The thickness of the plated film is about 100-200nm.

Embodiment 2

[0036] Substrate: Glass disc

[0037] Target material for coating: silver with a purity of ≥99.9%

[0038] Coating equipment: Take the DMD-450 optical multilayer coating machine produced by Beijing Instrument Factory as an example

[0039] Film thickness control: 0.6g / 100 glass discs

[0040] Coating process: Open the vacuum chamber of the coating machine, attach 100 glass wafers to the special bracket of the coating machine through high temperature tape, put the surface into the coating machine after cleaning, and put 0.6g of silver with a purity of ≥99.9% In the evaporation parts. Close the vacuum chamber and evacuate to 1×10 -5 Torr, then began to vaporize. The coating time is about 30-60 minutes. After opening the vacuum chamber, the prepared test piece can be removed and vacuum packaged. The thickness of the plated film is about 200nm.

Embodiment 3

[0042] Substrate: plastic sheet

[0043] Target material for coating: silver with a purity of ≥99.9%

[0044] Coating equipment: Take the DMD-450 optical multilayer coating machine produced by Beijing Instrument Factory as an example

[0045] Film thickness control: 0.6g / 100 pieces of plastic sheet

[0046] Coating process: Open the vacuum chamber of the coating machine, attach 100 plastic sheets to the special bracket of the coating machine through high temperature tape, put the surface into the coating machine after cleaning, and put 0.6g of silver with a purity of ≥99.9% in the coating machine. Parts for evaporation. Close the vacuum chamber and evacuate to 1×10 -5 Torr, then began to vaporize. The coating time is about 30-60 minutes. After opening the vacuum chamber, the prepared test piece can be removed and vacuum packaged. The thickness of the plated film is about 200nm.

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Abstract

The invention pertains to the technical field of material testing, in particular to a metallic film specimen and its preparing method for evaluating and screening the stored materials in a museum. The invention uses modern and mature film-coating technology to coat silver and copper particle film in thickness of 100-300nm on surfaces of different substrates, so as to get the desired metallic film specimen. The invention can greatly reduce the use of metallic material, simplify operation and reduce cost; can avoid the shortcoming of poor repeatability of experimental data due to bulk metallic specimen, is good for digital analysis on the difference in specimen before and after corrosion, and overcomes any artificial error brought about by Oddy Test due to observation by naked eyes, and can greatly reduce the test period, is good for popularization and application in great scale.

Description

Technical field [0001] The invention belongs to the technical field of material testing, and in particular relates to a metal thin film test piece for the evaluation and screening of materials in museum collections and a preparation method thereof. Background technique [0002] With the development of modern industry, there are more and more types of materials such as wood, plastics, textiles, paints, adhesives, polymer materials, and composite materials that can be used for storage, display and decoration of museums. These storage, display and decoration materials can be slowly released or degraded to generate various volatile components, such as sulfur-containing compounds, formic acid, acetic acid, olefins, carbonyl compounds, and so on. In a closed showcase or storage room, the concentration of these compounds will be continuously released from the material and will accelerate the corrosion of cultural relics such as various metal cultural relics. Although people have conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N1/28
Inventor 孔令东张敏陈建民吴来明周新光解玉林王克华
Owner FUDAN UNIV
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