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Preparation method of tungsten-based sealing material chemical Ni-P coating

A sealing material and chemical plating technology, applied in the field of materials, can solve the problems of inactive metal tungsten chemical properties and poor pretreatment effect, and achieve the effect of smooth and dense coating

Inactive Publication Date: 2019-06-04
沈阳益泰科信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the chemical nature of metal tungsten is very inactive, the pretreatment method of cleaning with hydrochloric acid alone is not good for the pretreatment effect of the primary metallization substrate with metal tungsten (W) as the sealing metal

Method used

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  • Preparation method of tungsten-based sealing material chemical Ni-P coating
  • Preparation method of tungsten-based sealing material chemical Ni-P coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation method of the electroless Ni-P coating on the tungsten-based sealing material specifically includes the following steps.

[0015] Step 1. Preparation of the primary metallization layer: Soak an alumina thin porcelain plate with an alumina content of 98% in an ammonia solution with a concentration of 70% for 30 minutes; select tungsten as the sealing metal, and use conventional activated molybdenum in this field - Metallize it once by manganese method; carefully weigh the raw materials used in the metallization formula, grind it in an agate mortar for 2 hours, add an appropriate amount of diethyl oxalate, and add 10ml of nitrocellulose solution after it is completely soaked , to form a paste with a certain viscosity; use the manual pen paste process to coat, and then sinter the coated sample in a horizontal hydrogen furnace at a sintering temperature of 180°C; after the primary metallization process, the obtained The metal sheet is cut into 10mm×10mm.

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Embodiment 2

[0020] The preparation method of the electroless Ni-P coating on the tungsten-based sealing material specifically includes the following steps.

[0021] Step 1. Preparation of the primary metallization layer: Soak an alumina thin ceramic plate with an alumina content of 97% in an ammonia solution with a concentration of 60% for 25 minutes; select tungsten as the sealing metal, and use conventional activated molybdenum in this field - Metallize it once by manganese method; carefully weigh the raw materials used in the metallization formula, grind it in an agate mortar for 2 hours, add an appropriate amount of diethyl oxalate, and add 15ml of nitrocellulose solution after it is completely soaked , to form a paste with a certain viscosity; use the manual pen paste process to coat, and then sinter the coated sample in a horizontal hydrogen furnace at a sintering temperature of 190°C; after the primary metallization process, the obtained The metal sheet is cut into 10mm×10mm.

[0...

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Abstract

The invention belongs to the field of materials, and particularly relates to a preparation method of a tungsten-based sealing material chemical Ni-P coating. The preparation method aims at the sealing95 alumina ceramic matrix material of the ternary magnesium-aluminum-silicon, the tungsten-based sealing material is selected to be subjected to primary metallization treatment through an activated molybdenum-manganese method, pretreatment is carried out on the primary metallized matrix by adopting a method combining grinding and hydrochloric acid pickling, and finally the secondary metallized Ni-P coating is prepared by utilizing a chemical plating technology. According to the preparation method of the tungsten-based sealing material chemical Ni-P coating, the pretreatment method combining grinding and acid washing is adopted, and the preparation method is an effective pretreatment method for secondary metallization of the tungsten-based sealing material; the preparation method can obtain a smooth primary metallized surface layer, meanwhile, a primary surface layer can be activated, and a foundation is laid for secondary metallization; the Ni-P coating can be prepared on the surfaceof the tungsten-based primary metallization sealing material by adopting a chemical plating process, and the coating is smooth and dense and is in an amorphous structure.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a method for preparing an electroless Ni-P coating on a tungsten-based sealing material. Background technique [0002] With the rapid development of the national economy, various sealing technologies are constantly making new progress, especially the ceramic-metal sealing technology has been widely used in vacuum electronic devices, microelectronics technology, laser and infrared technology, electric light source, High energy physics and aerospace industry and other fields. Excellent airtightness and reliable sealing strength are crucial to ceramic-metal sealing technology, and the key to realizing this technology is ceramic metallization. Ceramic metallization generally includes two steps of primary metallization and secondary metallization. Primary metallization refers to coating the ceramic surface with a paste composed of molybdenum, tungsten, rhenium and other refractory metal pow...

Claims

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Application Information

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IPC IPC(8): C23C18/32C23C18/18
Inventor 葛秋红
Owner 沈阳益泰科信息技术有限公司
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