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WVTR Measurement-P2O5 Moisture Sensor

For WVTR measurement, moisture sensor is one of the critical components which determine the accuracy of the testing results

WVTR Test-ASTM F1249

Another standard for the WVTR test is ASTM F1249.

Water Vapor Transfer Rate Test by cup method

WVTR testing

ASTM E 96 is a standard for the testing of water transfer rate using cup method, in which two methods is elaborated: Desiccant Method and Water Method. The following content is copied from the linked website.

Cathodic & anodic electrochromic metal oxides

The following shaded boxes in Periodic Table of the elements refer to the transition metals whose oxides have well-documented cathodic and anodic electrochromism

Foam compression set

Compression set is an important parameter to evaluate the foam’s permanent deflection which determines the long term performances,. e.g. sealing, isolation.

A method to reduce nodules on ED copper foil

ED copper foil is broadly used in Li-ion battery and printed circuit boards in electronics industry. However, nodules are commonly observed on the surface of ED copper foil made through a conventional electro-deposition method. Patent of US 9,562.298 B2 teaches a new way to reduce the number of the nodules on the surface.

Liquid metal

For liquid metals, people may immediately think of mercury; in fact there are several other metals with melting point close to room temperature in addition to Mercury (Hg, MP=−38.8 °C, e.g. Caesium(Cs, MP=28.5 °C, Rubidium (Rb, MP=39 °C, Francium (Fr, estimated MP= at 27 °C), and Gallium (Ga, MP=30 °C). However, due to the issues of radioactivity, vapor pressure, and toxicity, etc, the practical liquid metal is typically Ga based eutectic alloy with melting point less than that of Ga.

Accuracy of Steady State Thermal conductivity measurement

The steady state method is commonly adopted to measure thermal resistance and conductivity of thermal interface materials or TIMs. A heat flow through the TIM is generated and the temperature gradient across the TIM is measured, and the thermal resistance or conductivity can be calculated through the procedure defined by ASTM standard ASTM D5470.

Cyclic voltammetry

Cyclic voltammeter is frequently adopted to study electron transfer in electrochemistry, battery, electrochromic, semiconducting devices fields.

Thermal contact resistance & TIM measurement

Heat flow method can be adopted to measure the thermal contact resistance of two mating samples or thin film materials.