ASTM D7148
Standard Test Method for Determining the Ionic Resistivity (ER) of Alkaline Battery Separator Using a Carbon Electrode in an Electrolyte Bath Measuring System
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About This Item
ASTM D7148 is a standard test method for determining the ionic resistivity, or ER, of an alkaline battery separator using a carbon electrode in an electrolyte bath measuring system. It provides a controlled way to evaluate how the separator behaves in an electrolyte environment, which is important for understanding electrical resistance-related performance. For battery manufacturers, test labs, and quality teams, this standard supports more consistent measurement and comparison of separator materials.
Purpose of ASTM D7148
The purpose of ASTM D7148 is to define a repeatable test method for measuring the ionic resistivity of an alkaline battery separator under specified conditions. By using a carbon electrode and an electrolyte bath measuring system, the standard helps establish a common technical basis for evaluating separator properties. This is useful when material performance needs to be compared across batches, suppliers, or development programs. It supports more uniform testing practice and helps reduce uncertainty in separator assessment.
Common use cases of ASTM D7148
This standard is commonly used in battery materials evaluation, separator development, incoming material inspection, and production quality control for alkaline battery systems. It may also be used in laboratory testing programs where separator performance needs to be measured in a consistent electrolyte-based setup. ASTM D7148 is especially relevant when teams need a reliable method for comparing ionic resistivity values and documenting results for technical review, procurement decisions, or product qualification.
Why ASTM D7148 matters
ASTM D7148 matters because separator resistivity can influence how an alkaline battery performs in practice, making consistent measurement important for product development and quality assurance. A defined test method helps organizations compare materials more fairly, support compliance workflows, and reduce variability in test results. It can also improve confidence in supplier data and internal specifications. For engineering and purchasing teams, the standard provides a clearer basis for evaluation and decision-making.
- Ionic resistivity measurement for separator materials
- Carbon electrode and electrolyte bath setup
- Alkaline battery separator testing
- Repeatable quality control comparisons
- Technical review and procurement support
- Publication Date: 2023-09-13
- Publisher: ASTM
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