Chemistry Reference
In-Depth Information
Fig. 7.1
Schematic diagram
of thermographic setup T-1:
1
, thermograph;
2
,
pressurizing system;
3
,
temperature programmer;
4
,
registration unit;
5
,
thermograph block (Al
cylinder);
6
, heater;
7
,
reference thermocouple;
8
,
working cell;
9
, centering
ring plate;
10
, working
thermocouple;
11
, protective
casing
Fig. 7.2
Schematic diagram
of thermographic setup T-2:
1
, thermograph;
2
,
pressurizing system;
3
,
temperature programmer;
4
,
registration unit;
5
, system for
casing manipulation
load
water
thermocouples
10
are inserted into the holes in the block and centered in the cylinder
via ceramic and aluminum ring plates
9
. These act as thermal barriers, preventing
heat losses from the cells via the thermocouple wires. This is extremely important
in DTA with dilution, since the heat released in a working cell is not very high.
The working cells
8
are mounted on the thermocouple junction. The ends of the
thermocouples are placed into thin (1 mm in diameter) porcelain two-channel tubes,
while the thermocouples themselves are placed in thicker (3 mm in diameter) tubes.
