Nickel Nanopowder Paste via Segmentation and Reduction
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Solution Overview
Problem
The conventional method of preparing nickel powder for MLCC electrodes faces challenges such as severe aggregation, difficulty in controlling shape and size, and reliance on imported materials, with no established process for converting nickel oxides into nanopowders and forming them into a paste for ease of storage and transport.
Innovation Solution
A method involving the preparation of nickel oxide in the form of an oxide, followed by pulverization to nano-sized nickel oxide nanopowder, drying, reduction in a hydrogen atmosphere to form natural metal nickel nanopowder, crushing, and applying an oxidation-preventing coating to create a paste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If nickel powder is prepared by liquid reducing process, then nickel powder can be produced, but the nickel powder is severely aggregated and difficult to control shape and size
Solution Approach 1:
The invention segments the nickel oxide particles into nano-sized particles through pulverization, achieving fine size control and uniform distribution. This segmentation approach prevents aggregation and enables precise shape and size control that was not achievable with conventional liquid reducing processes.
Solution Approach 2:
The invention changes the physical and chemical parameters of the nickel powder by controlling the pulverization process, heat treatment temperature, and oxidation conditions. These parameter changes enable precise control over particle size, shape, and surface properties, resolving the manufacturing precision issue.
2Reliability
If nickel oxide nanopowder is produced through pulverization and reduction, then natural metal nickel nanopowder can be obtained, but the process complexity increases
Solution Approach 1:
The invention merges multiple process steps into integrated operations. The pulverization, drying, reduction, and heat treatment steps are combined into a coordinated process flow, reducing the need for separate equipment and operations while maintaining high nickel powder quality.
Solution Approach 2:
The invention uses nickel oxide as an intermediary material in the process. By converting nickel oxide to nickel nanopowder through controlled reduction, the process achieves high reliability and purity while managing complexity through this intermediate stage that facilitates controlled transformation.
3Ease of operation
If nickel powder is produced in powder form, then it can be used as electrode material, but storage and transport become difficult
Solution Approach 1:
The invention changes the physical state parameter of the nickel powder by controlling particle size, surface area, and morphology through pulverization and heat treatment. These parameter changes enable the nickel to be processed into paste form, improving storage and transport ease while maintaining particle uniformity through controlled transformation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method improves the dispersibility and yield of nickel powder, enabling its suitable use as an electrode material, simplifies storage and transport by converting the powder into a paste, and reduces the need for imported materials.
Implementation Method 1
a step of preparing the nickel oxide nanopowder into a natural metal nickel nanopowder by a reduction process in a hydrogen atmosphere
Implementation Method 2
heat-treating the nickel oxide nanopowder at the same time to prepare a natural metal nickel nanopowder
Data Source
AI summary
Provided is a method for making nickel nanopowders into paste including: (a) preparing a nickel oxide configured in the form of an oxide; (b) preparing nano-sized nickel oxide nanopowders by pulverizing the nickel oxide; (c) a step of drying the nickel oxide nanopowders; (d) a step of preparing natural metal nickel nanopowders by preparing the nickel oxide nanopowders as the natural metal nickel nanopowders through a reduction process in a hydrogen atmosphere and heat-treating the same at the same time; (e) a step of simultaneously performing a step of crushing the natural metal nickel nanopowders prepared by the heat treatment and a nanopowder oxidation preventing coating step of forming an oxidation preventing film on the natural metal nickel nanopowders with an additive; and (f) a step of making the natural metal nickel nanopowders, which have been simultaneously subjected to the crushing and coating steps, into paste.