The firing procedure in the ceramics manufacturing process is primarily controlled by monitoring temperature profiles, but the actual thermal history experienced by the fired body varies depending on the heat source, heat capacity, and other factors of the furnace.
The Referthermo sensor is a practical reference tool for which the composition of its ingredients, particle size, molding density, etc. have been rigorously controlled, and it shrinks with high repeatability in response to the actual thermal history it is subjected to during firing.
Users can grasp changes in firing conditions by firing the Referthermo sensor together with the product to be fired and then measuring the length after firing.
* For more information, please access the Referthermo Users’ Manual.
Through standardized quantification of firing conditions by use of the Referthermo sensor, users will be able to share comprehensive technical data and make comparative evaluations.
The sensors may be used continuously on a regular basis to discover any abnormalities in firing furnaces, statistical quality analysis, etc.
Applications
For firing management and statistical quality analysis of engineering ceramics, electric ceramics, and old ceramics such as pottery, etc.
How to Use
Place the Refertherm sensor at the observation point and fire, then cool the sensor to room temperature before measuring its length with a micrometer.
(Attention: Let the Refertherm sensor stand at room temperature for at least one hour before measurement.)
Referthermo index
Use the length measured above and the conversion table to determine the Referthermo index, which should serve as your control guide. The Referthermo index is not actual physical temperature but an indicator of the overall thermal history of the fired product.
The Referthermo index shown here is equivalent to the temperature settings for firing with rate of temperature increase of 200°C/hour, holding time of two hours, and rate of temperature decrease of 300°C/hour.
* Precautions for use
Using this sensor in a furnace in a vacuum or in a low oxygen partial pressure environment may cause some of its components to evaporate, resulting in contamination of your furnace.
Operating temperature range and measuring repeatability of Referthermo index.
Type
Operating temperature range
Measuring repeatability of Referthermo index
H
1400～1700℃
±10℃
M
1200～1500℃
±10℃
L
1050～1300℃
±10℃
L1
800～1150℃
±15℃
L2
600～900℃
±15℃
Referthermo Length- Referthermo index Conversion Table
If you purchased this product previously and wish to have your conversion table reissued, please contact the JFCC Reference Materials Distribution section (standard@*) with your name, affiliation, and contact information, as well as the type and lot number of the Referthermo you purchased. (*Add "jfcc.or.jp" after the @ in the e-mail address when contacting us.)
Contact information of Referthermo distributors
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