Beginner-friendly! Basics of temperature measurement in MLCC manufacturing process and key points for reducing defects, Part 3

　

radiation thermometer (non-contact type)

Radiation thermometer are non-contact thermometers that measure temperature by detecting the infrared energy emitted by an object. They are particularly suitable for measuring the temperature of objects that are moving at high temperatures, such as in the MLCC manufacturing process, or for measuring the temperature of objects that cannot be touched.

　

Features

　

• Non-contact measurement

  Because the temperature can be measured without touching the object being measured, there is no risk of contaminating or damaging the product. When mixing ceramic powder, binder, solvent, etc. to prepare a slurry, the temperature during mixing can affect viscosity and dispersibility. Preparing a uniform slurry at the appropriate temperature directly impacts the subsequent sheet quality.
　

• High-speed response

  Because it can easily capture temperature changes in real time, it is suitable for temperature monitoring on high-speed production lines.
　

• Wide-range measurement

  There are various types of thermographic sensors that can measure temperatures over a wide area at once, as well as types that focus on measuring a specific point, allowing you to choose the one that best suits your application.
　

• High temperature measurement

  We can also measure temperatures inside firing furnaces ranging from several hundred degrees Celsius to over a thousand degrees Celsius.

　

Applications in MLCC manufacturing

• Monitoring of temperature distribution inside the firing furnace

  We measure the surface temperature of MLCC chips being transported at high-speed in conveyor furnaces and evaluate whether the heating profile is appropriate.

• Product temperature measurement during high-speed transport

  Because it can easily capture temperature changes in real time, it is suitable for temperature monitoring on high-speed production lines.
　

• Crack prevention due to thermal stress

  In process where rapid temperature changes are expected, the temperature changes on the product surface are monitored to reduce the risk of cracking due to thermal shock.

　

Thermocouple

Thermocouples are contact-type temperature sensors that utilize the phenomenon (the Seebek effect), where an electromotive force is generated when there is a temperature difference between the contact of two different metals.

　

Features

• High accuracy

  It is possible to measure with very high accuracy within a specific temperature range.

• Wide temperature range

  There are types available that can handle a wide temperature range, from extremely cryogenic temperature to very high temperatures (over 1,000°C).

• Durability

  By placing it in a metal protective tube, it can be used even in harsh environments.

• Installation flexibility

  Because it is small and easy to process, it can be directly installed at specific points inside furnaces or equipment to measure temperature.

　

Applications in MLCC manufacturing

• Control the ambient temperature inside the furnace

  The internal ambient temperature of firing furnaces and binder removal furnaces is precisely measured and feedback into the furnace heater control.

• Temperature measurement of process gases

  Monitor the gas temperature to adjust the firing atmosphere.

• Precise temperature monitoring inside the device

  By directly measuring the temperature of components that configuration the equipment, such as rolls and belts, it supports the stable operation of the equipment.

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