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Silver clay and method for producing silver products using the silver clay

A production method and technology for silver products, which are applied in the field of preparation of silver clay for low-temperature sintering and its products, can solve problems such as the inability to be widely used in a wide range, and achieve the effect of simple and easy steps.

Inactive Publication Date: 2008-12-31
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because its sintering temperature is still high, special sintering tools are still required for sintering, and it cannot be widely used. Therefore, it is necessary to prepare silver clay with lower sintering temperature

Method used

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  • Silver clay and method for producing silver products using the silver clay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Prepare silver powder in the following proportions: 30% by mass of silver micropowder with an average particle diameter of 0.286 μm, and 70 mass percent of silver micropowder with an average particle diameter of 1.21 μm;

[0036] Silver powder, bismuth powder and methyl cellulose as a binder are planetary ball milled at a speed of 1000r / min for 10 minutes in a ball mill jar, then olive oil and water are added as fats and oils, and silver clay is obtained after mixing evenly. The content of each component in the silver clay is: 80% by mass of silver powder, 1% by mass of bismuth powder, 7% by mass of binder, 1% by mass of oil, and the rest is water;

[0037] The silver clay is molded under 10MPa using a hydraulic press;

[0038] Bake the molded silver clay at 95°C for 12 hours to obtain a blank;

[0039] Put the blank into the resistance sintering furnace, and use the intelligent temperature regulator to control the heating program of the resistance furnace, so that the...

Embodiment 2

[0042] Silver powder is prepared in the following proportions: 40% by mass of silver micropowder with an average particle diameter of 0.5 μm, and 60 mass percent of silver micropowder with an average particle diameter of 2.5 μm;

[0043] Silver powder, bismuth powder and methyl cellulose as a binder are planetary ball milled in a ball mill jar at a speed of 1000r / min for 30 minutes, then olive oil and water are added as fats and oils, and silver clay is obtained after mixing evenly. The content of each component in the silver clay is: 70% by mass of silver powder, 0.8% by mass of bismuth powder, 5% by mass of binder, 2% by mass of oil, and the rest is water;

[0044] The silver clay is molded under 10MPa using a hydraulic press;

[0045] Bake the molded silver clay at 80°C for 12 hours to obtain a blank;

[0046] Put the blank into the resistance sintering furnace, and use the intelligent temperature regulator to control the heating program of the resistance furnace, so that ...

Embodiment 3

[0049] Prepare silver powder in the following proportions: 35% by mass of silver micropowder with an average particle diameter of 0.137 μm, and 65 mass percent of silver micropowder with an average particle diameter of 1 μm;

[0050] Silver powder, bismuth powder and methyl cellulose as a binder are planetary ball milled at a speed of 1000r / min for 60 minutes in a ball mill jar, then olive oil and water are added as fats and oils, and silver clay is obtained after mixing evenly. The content of each component in the silver clay is: 75% by mass of silver powder, 0.3% by mass of bismuth powder, 8% by mass of binder, 1.5% by mass of oil, and the rest is water;

[0051] The silver clay is molded under 10MPa using a hydraulic press;

[0052] Bake the molded silver clay at 100°C for 12 hours to obtain a blank;

[0053] Put the blank into the resistance sintering furnace, and use the intelligent temperature regulator to control the heating program of the resistance furnace, so that t...

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Abstract

The invention discloses a sliver clay which is composed of sliver powder, bismuth powder, an adhesive, grease and water, wherein, the content of each component calculated based on weight is as follows: 70-80% of the sliver powder, 0.3-1.2% of the bismuth powder, 5-8% of the adhesive, 1-2% of the grease, and the rest of water; the sliver powder is composed of 30-40% of micro sliver powder with the average grain diameter less than or equal to 0.5Mum and the rest of micro sliver powder with the average grain diameter of 1-3Mum by weight. The sliver clay of the invention has a lower sintering temperature, and can be fully sintered at the temperature of 450-500 DEG C. The invention further discloses a method for preparing silverware with the sliver clay.

Description

technical field [0001] The invention relates to the preparation technology of silver clay for low-temperature sintering and its products. Background technique [0002] Silver, like gold, is a precious metal with a long history of application, with a history of more than 4,000 years. Because silver has the advantages of moderate price, good luster, and health care, silver jewelry and its handicrafts are very popular in the world, and they are generally optimistic in China. [0003] Silver jewelry or silver products are usually prepared by casting or forging. In recent years, silver clay has appeared internationally and has developed rapidly. Silver clay has a lower sintering temperature, and non-industrial equipment can be used to make silver products with silver clay. [0004] The Chinese Invention Patent Specification whose authorized notification number is CN1280045C discloses a silver clay, which is composed of the following components: 50-95% by mass of silver powder,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/16
Inventor 符春林陈华强邓小玲
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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