Humidity Measurement in Tantalum Capacitor Pyrolysis Furnaces

Introduction

Humidity Measurement in Tantalum Capacitor Pyrolysis Furnaces

In tantalum capacitor manufacturing, there is a steam pyrolysis process where tantalum pellets are decomposed by steam. Humidity control in this process is important to maintain product quality and improve yield.
Stable humidity measurement at high temperatures of 200 to 400 °C is required. The ZR802G Zirconia High Temperature Humidity Analyzer is easy to maintain because of direct insertion in process without sampling system and utilizes a long-life sensor with fast response. It is widely used in humidity instrumentation applications and has been well received in the marketplace.

Expected Benefits

  • Maintains the quality of the tantalum capacitor manufacturing process
  • Ensures stable, continuous humidity measurement
  • Reduces operating costs

Process Overview

A tantalum pellet with an electrode plate applied is immersed in a manganese nitrate solution. This dipping process allows the manganese nitrate to penetrate the porous part of the pellet. After dipping, the pellet is forwarded to the pyrolysis process where the manganese nitrate is decomposed under high temperature and humidity conditions to form a manganese dioxide coating by the reaction Mn(NO3)2 -> MnO2 + 2NO2. These steps are repeated until the coating is sufficient. To improve the coating uniformity and yield, the humidity is controlled.

Steam Pyrolysis Process in Tantalum Capacitor Manufacturing

 

Solution Details

Field Data

Process conditions

Measurement point Inside the steam
pyrolysis furnace
Temperature 200 to 400°C
Pressure 10 to 20 Pa
Humidity 25 to 80 vol%H2O
Dust None

Measurement system

Detector ZR22G-☐☐☐-S-☐-C-R-☐-E-A/SV
Converter ZR802G-☐-☐-N-N /☐
Standard gas unit ZO21S-☐-E*A

Utilities

Rated voltage 100 to 240 V AC
Rated frequency 50/60 Hz
Power consumption 330 VA (Max. 800 VA)

ZR802G

Notes on Installation: As the sensor inside a pyrolysis furnace is hot, it can be easily damaged if cooler water drips onto it. The sensor should be installed with the probe head pointing downward.

Productos y Soluciones Relacionadas

  • Zirconia Oxygen/Humidity Analyzer ZR22G, ZR802G

    This Oxygen concentration and humidity at high temperatures consists of a ZR22G detector equipped with a long-life and highly reliable zirconia sensor, and a converter ZR802G equipped with digital communication and data log functions.
    ZR22G and ZR802G can be measured directly and continuously without a sampling device. It is easy to maintain and reduce operating costs by self-diagnosis of sensor deterioration (without using calibration gas )and replacing the heater assembly on site.

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