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Gold-arsenic alloy material and preparation method thereof

An alloy material and a manufacturing method technology are applied in the field of gold-arsenic alloy targets and their preparation, which can solve the problem of difficulty in adding arsenic elements, and achieve the effects of high arsenic content, good resistance to electromigration, and good resistance to electrocorrosion.

Active Publication Date: 2012-07-25
BEIJING INST OF NONFERROUS METALS & RARE EARTH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to provide a method for preparing a gold-arsenic alloy material, which uses a unique doping technology to add arsenic that has sublimation characteristics and is volatile to the master alloy, which solves the problem of difficult addition of arsenic in the alloy Problems, at the same time in line with environmental protection policies, no pollution problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Preparation of AuAs20 master alloy

[0050] The gold-arsenic master alloy was prepared by the following preparation method, and its composition and mass percentage were: As: 20%, Au: balance (referred to as AuAs20).

[0051] The preparation process is as follows:

[0052] a) Prepare raw materials: purify gold to above 5N (>99.999%) by electrolysis, purchase arsenic raw materials above 5N; weigh according to the composition and mass percentage of the target alloy;

[0053] b) put into the quartz crucible in the order of arsenic and gold;

[0054] c) After evacuating the quartz crucible to 4~6Pa, seal the crucible mouth with a sealing plug;

[0055] d) Put the quartz crucible into a resistance furnace with better sealing;

[0056] e) heating up, and controlling the heating rate to 8~12℃ / min;

[0057] f) When the temperature in the furnace rises to 600°C, fill the furnace with argon, and control the pressure in the furnace within the range of 80-110MPa;

[...

Embodiment 2

[0064] Example 2: Preparation of AuAs1 master alloy

[0065] The gold-arsenic master alloy was prepared by the following preparation method, and its composition and mass percentage were: As: 1%. Au: surplus (abbreviated as AuAs1).

[0066] Except for the j)th step in the method described in Embodiment 1, the preparation process of Embodiment 2 is the same as that described in Embodiment 1. Item j) in Example 2 is as follows: maintaining the pressure in the furnace, the temperature is lowered to 1050°C at a rate of 20°C / min.

Embodiment 3

[0067] Example 3: Preparation of AuAs10 master alloy

[0068] The gold-arsenic master alloy was prepared by the following preparation method, and its composition and mass percentage were: As: 10%. Au: surplus (abbreviated as AuAs10).

[0069] Except for the j)th step in the method described in Embodiment 1, the preparation process of Embodiment 3 is basically the same as that described in Embodiment 1. Item j) in Example 3 is as follows: maintaining the pressure in the furnace, the temperature is lowered to 800°C at a rate of 20°C / min.

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Abstract

The invention discloses a gold-arsenic alloy material and a preparation method thereof. The composition of gold-arsenic alloy is as follows: As: within 1 to 20%; Au: the remaining part. The preparation method is as follows: intermediate alloy is prepared first, and proportion weighing is carried out according to the needed intermediate alloy; arsenic and gold are sequentially put into a quartz crucible; the quartz crucible is sealed after being vacuumized; the quartz crucible is placed into a sealed resistance furnace; the temperature is risen to 600 DEG C at the speed of 8 to 12 DEG C per minute; argon gas is inflated into the resistance furnace; the temperature continues to be risen to 1,100 to 1,500 DEG C, and a gold-arsenic melt is melted and refined; the temperature is lowered to 680to 1,050 DEG C; the pressure in the resistance furnace is released, a sealing plug of the quartz crucible is quickly opened, melted alloy solution is poured into a water-cooling cast iron mould, and an intermediate alloy ingot is obtained. Then, according to the proportion of the needed gold-arsenic alloy, the temperature of the obtained intermediate alloy ingot together with residual gold is risen to 750 to 1,200 DEG C at the speed of 350 to 500 DEG C per minute for melting and refining; and the gold-arsenic alloy material is obtained through pouring.

Description

technical field [0001] The invention relates to a technology for preparing precious metal alloys, a technology for adding high-content volatile elements with sublimation characteristics, and in particular to a gold-arsenic alloy target and a preparation method thereof. Background technique [0002] P.L.S band silicon power transistors are widely used in radar, navigation and communication fields. A key technique for making this transistor is metallization. One of the raw materials used in metallization technology is a gold-arsenic alloy target. The main reason is that the gold-arsenic alloy target has good anti-electromigration and anti-corrosion properties, and the alloy has stable properties. The metallization technology of P.LS band silicon power transistors requires that the arsenic content in the gold-arsenic alloy target be more than 1%. [0003] At present, only alloy targets with an arsenic content of 0.1-0.5% can be prepared by using the conventional method of ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/02C22C1/03
Inventor 姜学昭董宝全史秀梅
Owner BEIJING INST OF NONFERROUS METALS & RARE EARTH
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