schupp PTCR Handbuch Seite 7

PTCR
Technique & Application
A curve is fitted through these 8 points, which is used to make the
new table. For the standard conditions the differences in shrinkage
between the new batch and the reference batch now have been
compensated for.
Firing under different conditions
atmosphere, etc.) might not have exactly the same effect on rings
from different batches. When this is the case, the compensation
introduced must be altered in order to achieve the exact same ring
temperature with different batches of rings. This is not a bad thing. It
is just a modification of the calibration to suit a specific firing process.
Theoretically, the rings should be re-calibrated for each process
every time a new batch is used. As a service to customers a "standard"
compensation, which works very well for most processes can be
provided.
Occasionally, differences between batches when fired with a
specific firing process get too great or a customer wants the highest
possible degree of accuracy. The customer then has to calibrate the
new batch of rings himself.
15. Is there any expiration date for PTCR?
No! PTCR is a ceramic material and can be stored without limitation.
16. What are the perfects storage conditions for PTCR?
PTCR should be stored dry and protected against collision -
preferably in original packaging.
17. What is new with ZTH?
The ZTH ring is ideal for fast firing processes; oxidizing, inert, vacuum
as well as reducing atmospheres. For fast firing processes and non-
oxidizing atmospheres, the rings must be heat treated in air before
applying. A special ramp is available on request.
ZTH rings are produced of 100 % synthetically and sensitive raw
materials. Due to this fact the rings reacts very sensitively and
accurate to even smallest temperature changes. Handling with care
is mandatory. The rings measures exactly the peak temperature
applied during thermal processes in a wide range of soaking times; 5
minutes up to 120 minutes.
The information and statements contained herein are provided free of charge. They are believed to be accurate
®
at time of publication, but SCHUPP Ceramics makes no warranty with respect thereto, including but not
limited to any results to be obtained or the infringement of any proprietary rights. Use or application of such
information or statements is at user's sole discretion, without any liability on SCHUPP® Ceramics part. Nothing
herein shall be construed as a license of or recommendation for use that infringes upon any proprietary rights.
All sales are subject to SCHUPP® Ceramics General Business Conditions for deliveries and services.
Rev. 4_26.01.2018
(different curve, different
Page 6 of 6
M.E. SCHUPP Industriekeramik GmbH & Co. KG
Neuhausstraße 4-10, 52078 Aachen/Germany
Tel.: +49 (0) 241 -93677-0 Fax: +49 (0) 241 -93677-15
www.schupp-ceramics.com info@schupp-ceramics.com