What adverse effects will high and low temperature have on the product? IC electronic reliability test

Date：2022-08-02 17:45:57 Views：1334

High and low temperature test is used for adaptability test of electrical, electronic products, components and materials when they are stored, transported and used in high and low temperature environment, and whether electronic products can adapt to harsh environment. High and low temperature experiment is a necessary test item for product reliability. What adverse effects will high and low temperature have on products? This article has collected and sorted out some materials, which are expected to be of great reference value to readers.

Influence of high and low temperature on product reliability

Effect of low temperature on products

The elasticity of flexible materials such as rubber decreases and cracks occur;

The brittleness of metals and plastics increases, resulting in cracking or cracks;

Due to the different shrinkage coefficients of materials, when the temperature change rate is large, it will cause the moving parts to jam or rotate improperly;

The viscosity of lubricant increases or solidifies, and the friction between moving parts increases, causing the action to slow down or even stop working;

The electrical parameters of components change, affecting the electrical performance of products;

Freezing or frosting causes product structure damage or dampness, etc.

Low temperature environmental effect

Harden and embrittle the material.

The different shrinkage characteristics of different materials make the parts stuck.

Loss of lubrication due to increased viscosity of lubricant.

Electrical changes (such as resistance, capacitance, etc.).

The functions of transformers and electromechanical components have changed.

The impact base hardens.

Explosives are broken, such as ammonium nitrate.

Make the test piece crack and embrittle, change the impact strength and reduce the strength

Static fatigue occurs in glass.

Condense and freeze water.

Reduce human dexterity and degrade hearing and vision.

Change the combustion rate.

Effect of high temperature on products

Due to the different expansion coefficients of various materials, the bonding and migration between materials are caused;

The loss of lubricant or the reduction of lubrication performance increases the wear between moving parts;

Deformation of sealing packing, gasket, seal, bearing and rotating shaft;

Mechanical failure or complete failure due to bonding;

The electrical parameters of components change, which affects the electrical performance of products

Overheating of transformer and electromechanical components;

Inflammable or explosive materials cause combustion or explosion;

The internal pressure of the seal increases, resulting in cracking;

Aging, discoloration, blistering, cracking or cracking of organic materials;

The insulation performance of insulating materials is reduced.

High temperature environmental effect

The different expansion characteristics of different materials make the parts stuck.

The lubricant loses its viscosity, which causes the loss of lubricant and leads to the loss of lubrication of the contact.

The size of the test piece is changed in whole or in part.

Mechanical or total failure is caused by packaging, gaskets, seals, bearings and spindle becoming skewed, stuck and invalid.

The gasket is permanently deformed (gelatinous).

The air tightness function is degraded.

The resistance value changes.

The stability of the circuit changes with the temperature gradient and the different expansion characteristics of the material.

Overheating of transformers and electromechanical components.

Change the action / inaction margin of relays and magnetic and hot start components.

Reduce the idle time of operating life.

The internal crystal structure of solid materials is separated.

High pressure is generated inside the closed test piece.

Accelerate the combustion of explosives and propellers.

Explosive casting shell expands.

The explosive dissolves and exudes.

Deterioration and fracture of organic materials.

Influence of temperature change on products

The coating layer of components falls off, the potting materials and sealing compounds crack or even break the sealing shell, and the filling material leaks, which makes the electrical performance of components decline;

Products made of different materials are heated unevenly when the temperature changes, resulting in product deformation, cracking of sealing products, and breakage of glass or glassware and optics;

The large temperature difference will cause condensation or frosting on the surface of the product at low temperature, and evaporation or melting at high temperature. Such repeated actions will lead to and accelerate the corrosion of the product.

Environmental effect of temperature change

Glass products and optical equipment are broken.

The movable parts are stuck or loose.

The structure is separated.

Electrical changes.

Electronic or mechanical failure due to rapid condensation or icing.

Rupture occurs in granular or striate form.

Different shrinkage or expansion characteristics of different materials.

Deformation or fracture of components.

Cracking of surface coating.

Air leakage of the sealed cabin.

The above is the content related to the high and low temperature reliability test of electronic products compiled by the core detection team. I hope it will be helpful to you. Shenzhen Chuangxin Online Testing Technology Co., Ltd. is a well-known professional testing institution for electronic components in China, with 3 standardized laboratories covering an area of more than 1000 square meters. The scope of testing services covers: electronic component testing and verification, IC authenticity identification, product design and material selection, failure analysis, function testing, factory incoming material inspection, component X-ray testing, taping and other test items.