Stannous Oxide Powder Plate-Like Protrusions Plating Dissolution
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Solution Overview
Problem
Existing stannous oxide powders have insufficient dissolution rates in plating solutions due to their cubic or plate-like/spherical shapes, resulting in a small specific surface area and impurity-related issues in plating properties.
Innovation Solution
A stannous oxide powder with a plurality of plate-like protrusions and an average particle size of 1 μm to 15 μm, along with a specific surface area of 1.0 m2/g or more, is produced to enhance dissolution rates and reduce impurities, using a method involving Sn ion-containing acid solutions, neutralization steps, and controlled pH and temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If stannous oxide powder has a cubic shape or plate-like/spherical shape, then the particle morphology is simple and easy to manufacture, but the specific surface area is small and the dissolution rate into plating solution is insufficient
Solution Approach 1:
The stannous oxide powder particles are segmented into multiple plate-like protrusions extending from the particle surface. This segmentation increases the effective surface area and creates more contact points with the plating solution, thereby significantly enhancing the dissolution rate while maintaining a manageable particle morphology
Solution Approach 2:
The invention transitions from simple 0D cubic or spherical particles to particles with 2D plate-like protrusions extending in multiple directions. This dimensional enhancement dramatically increases the specific surface area and creates a more favorable geometry for dissolution into the plating solution
2Productivity
If stannous oxide powder has a small particle size to increase specific surface area, then the dissolution rate improves, but the handling and processing difficulty increases
Solution Approach 1:
The invention applies local quality by creating plate-like protrusions only on the particle surface rather than reducing the entire particle size. This localized structural modification increases specific surface area and dissolution rate while maintaining the overall particle size and handling characteristics
3Quantity of substance
If plating solution contains impurities precipitating with Sn, then the Sn supply is adequate, but the plating properties deteriorate due to impurity accumulation
Solution Approach 1:
The invention extracts and removes impurities from the stannous oxide powder during the washing process. By thoroughly washing the precipitated stannous oxide particles with water to remove soluble impurities before drying, the resulting powder has reduced impurity content that prevents plating solution contamination and maintains reliable plating properties
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
The resulting stannous oxide powder exhibits a high dissolution rate in acid solutions, effectively reducing impurities and improving plating solution properties, making it suitable as a Sn supply material with enhanced solubility and oxidation suppression.
Implementation Method 1
the stannous oxide powder significantly increases the dissolution rate into a plating solution
Implementation Method 2
a first neutralization step of adding an alkaline solution of any one or more selected from ammonium carbonate, ammonium bicarbonate, and ammonia water to the Sn ion-containing acid solution to maintain a pH of 3 to 6
Implementation Method 3
when added to a plating solution or the like, the plating solution flows between the plate-like protrusions such that contact between the plate-like protrusions and the plating solution is promoted
Data Source
AI summary
A stannous oxide powder which has a high dissolution rate into various acid solutions such as a plating solution and is particularly suitable as a Sn supply material to a plating solution, and a method for producing the stannous oxide powder are provided. The stannous oxide powder is a particle body having a plurality of plate-like protrusions protruding outward, and has an average particle size in a range of 1 μm to 15 μm.