Preparing process of hypoxia large particle special molybdenum powder special for LCD

A technology of special molybdenum powder and large particle size, which is applied in the field of producing special molybdenum powder with low oxygen and large particle size for LCD, which can solve the problems that the performance indicators cannot meet the requirements, and achieve easy control of the production process, simple operation, and high tap density. Effect

Inactive Publication Date: 2008-06-18
JINDUICHENG MOLYBDENUM CO LTD
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Problems solved by technology

The performance index of conventional molybdenum powder prepared by conventional molybdenum powder hydrogen reduction method cannot meet the requirements for preparing LCD sputtering targets

Method used

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  • Preparing process of hypoxia large particle special molybdenum powder special for LCD

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Embodiment

[0028] Take 100kg of molybdenum powder that meets the requirements of MP-1 in the Q / JDC013-2002 standard for use, the average Fischer particle size is 3.50μm, and the bulk density is 1.04g / cm 3 , The chemical content index is in line with the enterprise standard. According to the process requirements, firstly heat up the muffle furnace, raise the temperature to 1350°C according to the process and keep it warm; the amount of molybdenum powder loaded in each material boat is 5Kg, and push 2 boats into the muffle every 30 minutes according to the set process In the furnace, the operation is carried out by continuously pushing and discharging materials; after the molybdenum powder released from the furnace after reduction is discharged, it is crushed in the jaw crusher, and N2 gas must be fed into the crusher for protection during crushing; The molybdenum block is sent into the vacuum ball mill through the feeding mechanism, the ball-to-material ratio is set to 2:1, the ball milli...

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Abstract

Disclosed is a method that prepare LCD exclusive use special type molybdenum powder with low oxygen and large particle size, relating to a production method that use the method of hydrogen reduction sintering granulation to prepare low oxygen molybdenum powder with large particle size which is used for liquid crystal television and LCD. The invention is characterized in that the preparation process is to carry out granulation sintering in the molybdenum powder hydrogen reduction situation, and to crush in protective atmosphere, execute ball milling in vacuum; screen and classify the molybdenum powder after ball milling, then the LCD sputtering target material, exclusive use, low oxygen, large particle size, special type molybdenum powder is obtained. The method of the invention is to use hydrogen reduction sintering granulation and the subsequent ball milling treatment to prepare molybdenum powder which can meet the requirements of LCD sputtering target material; the device in using has simple structure and can make continuous and mass production with short preparation process; the technique is easy to control, the invention has low requirements for raw material molybdenum powder, the performance of product can meet the requirements of the preparation of sputtering target material.

Description

technical field [0001] A method for preparing special low-oxygen large-grain size molybdenum powder specially used for LCD relates to a production method for producing low-oxygen large-grain size molybdenum powder used in liquid crystal televisions and liquid crystal displays by adopting a method of hydrogen reduction sintering and granulation. Background technique [0002] With the advancement of science and technology and the development of the whole society, LCD TVs and LCD monitors are gradually entering the homes of ordinary people, and are gradually replacing flat-panel TVs and flat-screen monitors. Their market consumption potential is huge. Correspondingly, the molybdenum sputtering target material specially used for LCD display has also developed greatly. According to the forecast of LCD manufacturers, the next few years will be the peak period of LCD development, with an annual growth rate of about 30%, and it will gradually enter the peak period after 2008. With ...

Claims

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Application Information

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IPC IPC(8): B22F9/04
Inventor 张常乐
Owner JINDUICHENG MOLYBDENUM CO LTD
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