Preparation method of high-density platinum-rhodium alloy ingot for TFT platinum channel

A platinum-gold channel and platinum-rhodium alloy technology, which is applied in the field of high-density platinum-rhodium alloy ingot preparation, can solve problems affecting current and hot zone distribution, and achieve uniform current, improve product quality, and reduce gas content.

Active Publication Date: 2019-03-08
英特派铂业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The platinum channel pipe is a thin-walled pipe. If the density is not high and there are pores, it will affect the distribution of the current during the electric heating process, thereby affecting the distribution of the hot zone.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Vacuuming: put 2kg of platinum-rhodium 1 alloy into the zirconia crucible of the vacuum furnace, close the vacuum furnace cover, open the rotary vane vacuum pump and vacuum valve, and vacuumize to reduce the air pressure to 10Pa and keep ;

[0031] (2) Induction melting: Turn on the induction power supply, slowly increase the power to 10kW, and melt the metal;

[0032] (3) Add deoxidizer: Add 0.4g CaB to the alloy liquid through the feeding device of the vacuum furnace 6 , kept for 5 minutes to form a homogeneous alloy liquid;

[0033] (4) Slow solidification: Slowly reduce the power by 5kW to calm the alloy liquid and solidify slowly until the solidification is complete;

[0034] (5) Filling with argon: Keep the rotary vane vacuum pump running, close the vacuum valve, open the inflation valve and fill with argon to raise the air pressure to 200Pa;

[0035] (6) Vacuuming: close the inflation valve, open the vacuum valve, and reduce the air pressure to 10Pa again;...

Embodiment 2

[0040] (1) Vacuuming: Put 30kg of the proportioned platinum-rhodium 25 alloy into the zirconia crucible of the vacuum furnace, close the vacuum furnace cover, open the rotary vane vacuum pump and vacuum valve, and vacuumize to reduce the air pressure to 50Pa and maintain ;

[0041] (2) Induction melting: Turn on the induction power supply, slowly increase the power to 30kW, and melt the metal;

[0042] (3) Add deoxidizer: Add 24g CaB to the alloy liquid through the feeding device of the vacuum furnace 6 , kept for 30 minutes to form a homogeneous alloy liquid;

[0043] (4) Slow solidification: Slowly reduce the power by 15kW to calm the alloy liquid and then solidify slowly until the solidification is complete;

[0044] (5) Filling with argon: keep the rotary vane vacuum pump running, close the vacuum valve, open the inflation valve and fill in argon to raise the air pressure to 1000Pa;

[0045] (6) Vacuuming: close the inflation valve, open the vacuum valve, and reduce the...

Embodiment 3

[0050] (1) Vacuuming: Put 20kg of the proportioned platinum-rhodium 15 alloy into the zirconia crucible of the vacuum furnace, close the vacuum furnace cover, open the rotary vane vacuum pump and vacuum valve, and vacuumize to reduce the air pressure to 50Pa and keep ;

[0051] (2) Induction melting: Turn on the induction power supply, slowly increase the power to 30kW, and melt the metal;

[0052] (3) Add deoxidizer: add 6gCaB to the alloy liquid through the feeding device of the vacuum furnace 6 , kept for 20 minutes to form a homogeneous alloy liquid;

[0053] (4) Slow solidification: Slowly reduce the power by 15kW to calm the alloy liquid and then solidify slowly until the solidification is complete;

[0054] (5) Filling with argon: keep the rotary vane vacuum pump running, close the vacuum valve, open the inflation valve and fill in argon to raise the air pressure to 1000Pa;

[0055] (6) Vacuuming: close the inflation valve, open the vacuum valve, and reduce the air p...

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PUM

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Abstract

The invention relates to a preparation method of a high-density platinum-rhodium alloy ingot for a TFT platinum channel, and belongs to the technical field of metal materials. The platinum-rhodium alloy ingot with low porosity, no shrinkage porosity and high density is obtained by a smelting exhaust method of vacuuming, induction melting, deoxidizer adding, slowly solidifying, argon filling, vacuuming, induction melting and multiple cycles under the condition of only providing an ordinary mechanical pump. The preparation method effectively improves the density of a platinum-iridium product, thereby avoiding the uneven heating due to pores of the platinum-iridium product when the platinum-iridium product is electrified and heated.

Description

technical field [0001] The invention relates to a method for preparing a high-density platinum-rhodium alloy ingot for a TFT platinum channel, belonging to the technical field of metal materials. Background technique [0002] As an excellent high-temperature alloy material, platinum-rhodium alloy has high melting point, moderate resistivity, excellent high-temperature durable strength, excellent high-temperature oxidation resistance and corrosion resistance, and good processing performance. It plays an important role in the production of special glass. play an extremely important role. [0003] Since precious metals such as platinum and rhodium have a strong adsorption to oxygen, the alloy liquid will contain more oxygen, and when it solidifies after casting, defects such as pores and looseness will be formed inside the ingot. Especially when the rhodium content in the alloy is high, it is easier to contain a large amount of oxygen and cannot be discharged. [0004] TFT-LC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D7/00C22C1/02C22C1/06C22C5/04
CPCB22D7/005C22C1/02C22C1/06C22C5/04
Inventor 刘高斯金英杰杨志先陈明清施卫锋王来兵尹俊
Owner 英特派铂业股份有限公司
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