The Zeger cone (sometimes a pyroscope ) is a disposable product for temperature control from 600 to 2000 ° C , a heat indicator .
It is made of a mixture of clay and salt in the form of a cone or a pyramid 4-6 cm high .
In 1932, 59 different “numbers” of cones were produced in Germany for different temperatures. [one]
Content
History
They were proposed by the German chemist Hermann Seger (Hermann August Seger; 1839–1893) [2] in 1884 (according to other data, in 1886).
Application
It is mainly used for firing clay products (the quality of which is determined not only by the final temperature, but also by the heating time), as well as for evaluating the refractoriness of materials.
Seeger cones show only the final temperature. It is believed that a certain temperature is reached if the cone changes its original shape (the top bends downward until it touches the plane of the base of the cone). Such bending is greatly influenced by the heating time.
Usually used several cones, designed for close, but different temperatures. This allows you to more accurately assess the course of firing.
Science
In volcanology, Zeger cones were first used in 1912 . Frank Perret (1867–1943) applied them to determine the temperature in the lake of the lava of Kilauea volcano . The temperature was 1010 ° C.
Notes
- ↑ Hütte. Handbook for engineers, technicians and students = (Hütte, 26th edition, Germany, 1932). - 16th. - M.-L .: Gosmashmetizdat, 1936. - T. 1. - p. 773-774. - 1003 s.
- ↑ Seger cones - an article from the Great Soviet Encyclopedia .