Unlock instant, AI-driven research and patent intelligence for your innovation.
Micron-sized molybdenum powder as well as preparation method and application thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A micron-scale, molybdenum powder technology
Active Publication Date: 2021-02-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF16 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, this method adds multiple substances such as polyethylene glycol, polyvinyl alcohol, and ethanol, and the addition amount is large (more than 10%), which easily causes secondary pollution of molybdenum powder, and the subsequent sintering temperature is high (greater than 1550 ° C), not only Higher requirements are put forward for sintering equipment, and it is not conducive to energy saving
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0064] The present embodiment provides a kind of preparation method of micron molybdenum powder, and described preparation method comprises the following steps:
[0065] (1) Pass air into the molybdenum-containing hybrid solid, carry out gas-solid oxidation reaction, and obtain the intermediate solid; the time of feeding is 3h, the temperature is 425°C, and the heating rate is 5°C / min; The purge gas nitrogen is fed in for 16 minutes; the molybdenum-containing hybrid solid is the spherical hybrid disclosed in Example 4 of CN 107768660A;
[0066] (2) Pass hydrogen into the intermediate solid obtained in step (1), carry out the first stage of gas-solid hydrogen reduction reaction and the second stage of gas-solid hydrogen reduction reaction, and then pass in protective gas hydrogen until the molybdenum powder is completely cooled to obtain micron-sized molybdenum Powder; the time of the first gas-solid hydrogen reduction reaction is 4.5 hours, the temperature is 525 °C, and the h...
Embodiment 2
[0071] The present embodiment provides a kind of preparation method of micron molybdenum powder, and described preparation method comprises the following steps:
[0072] (1) Pass oxygen into the molybdenum-containing hybrid solid, carry out the gas-solid oxidation reaction, and obtain the intermediate solid; the time of feeding is 1h, the temperature is 300°C, and the heating rate is 3°C / min; The purge gas argon is fed in for 2 minutes; the molybdenum-containing hybrid solid is the ribbon-shaped hybrid disclosed in Example 1 of CN 107768660A;
[0073] (2) Pass hydrogen into the intermediate solid obtained in step (1), carry out the first stage of gas-solid hydrogen reduction reaction and the second stage of gas-solid hydrogen reduction reaction, and then pass in protective gas nitrogen until the molybdenum powder is completely cooled to obtain micron-sized molybdenum Powder; the time of the first stage of gas-solid hydrogen reduction reaction is 3h, the temperature is 450°C, a...
Embodiment 3
[0078] The present embodiment provides a kind of preparation method of micron molybdenum powder, and described preparation method comprises the following steps:
[0079] (1) Pass air into the molybdenum-containing hybrid solid, carry out gas-solid oxidation reaction, and obtain the intermediate solid; the time of feeding is 5h, the temperature is 550°C, and the heating rate is 8°C / min; Feed the purge gas neon for 30 minutes; the molybdenum-containing hybrid solid is the cubic hybrid disclosed in Example 6 of CN 107768660A;
[0080] (2) Pass hydrogen gas into the intermediate solid obtained in step (1), carry out the first stage of gas-solid hydrogen reduction reaction and the second stage of gas-solid hydrogen reduction reaction, and then pass in protective gas argon until the molybdenum powder is completely cooled to obtain micron-sized Molybdenum powder; the time of the first gas-solid hydrogen reduction reaction is 6h, the temperature is 600°C, and the heating rate is 5°C / m...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention provides micron-sized molybdenumpowder as well as a preparation method and application thereof. The preparation method comprises the following steps of, (1) mixing oxygen-containing gasand molybdenum-containing hybridsolid, and carrying out gas-solid oxidation reaction to obtain intermediate solid; and (2) carrying out gas-solid hydrogen reduction reaction on the mixed hydrogen and the intermediate solid obtained in the step (1) to obtain the micron-sized molybdenumpowder. The micron-sized molybdenum powder can be used for preparing a backlight molybdenum electrode of a liquid crystal display screen, a molybdenum cathodeassembly of a microwave oven magnetron or a molybdenum alloynozzle and a throatpipe for a space engine. According to the preparation method, the operation is simple, a obtained product has the characteristics of uniform particle size, good dispersity and the like, controllable preparation of molybdenum powder particles with different morphologies can be realized, and industrial application prospect is good.
Description
technical field [0001] The invention belongs to the technical field of material preparation, and relates to a method for preparing molybdenum powder, in particular to a micron-sized molybdenum powder and its preparation method and application. Background technique [0002] Molybdenum is an important raw material and an irreplaceable rare strategic resource. Due to its high melting point, high hardness, high strength, good electrical and thermal conductivity, wear resistance and corrosion resistance, molybdenum and its alloys are mainly used in metallurgy, Many cutting-edge high-tech fields such as agriculture, electricity, chemical industry, environmental protection and aerospace. [0003] In recent years, with the rapid development of modern technology, especially high-end technologies such as electronic information and aerospace, the demand for high-performance, miniature and special-shaped molybdenum-based products has increased sharply. For example, molybdenum electrode...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More