Material |
Code No. |
Operating Temp. deg C |
Maximum Temp. deg C |
Features |
Translucent Quartz |
QT |
1000 |
1100 |
99.99 % Quartz
Close one end excellent to thermal shock but fragile. Poor resistance to alkalis but good to acids. Less gas-tightness in hydrogen and reducing gases. High thermal conductivity. |
Transparent Quartz |
Mullite |
PT2 |
1400 |
1500 |
High alumina ceramic. Good resistance to thermal shock. Recommendable for use in coal or oil burning and electric furnaces. |
PT1 |
1500 |
1600 |
60 % Alumina-40 % Silica
Sintered alumina. Better than PT2 slightly less thermal shock resistance. Recommendable for use in heating furnace and regenerator impervious. |
Recrystallized Alumina |
PT0 |
1600 |
1800 |
99.7 % Alumina.
Superior chemical stability and better than PT1.Recommendable for use in molten steel, slag and molten glass, impervious. |
Cermet ( Cerome-Alumina ) |
LT1 |
1300 |
1400 |
77 % Alumina-23 % Chrome.
Excellent resistance to heat and abrasion. Recommendable for temperature measurements of molten copper and other nonferrous metals. |
Cermet ( Cermotherm ) |
2040 |
1600 |
2200 |
60 % Mo-40 % ZrO 2
High heat conductivity, good thermal shock resistance and corrosion resistance in molten metal steel but not suitable for use in oxidizing atmosphere at high temperatures. |
Recrystallized Silicon Carbide |
Y1 |
1650 |
--- |
99 % SiC
Good resistance to acids and alkalis. Recommendable for the use in neutral atmospheres up to 1500 deg C and also in molten zinc,aluminum,lead,copper,etc., porous. |
Self-bonded Silicon Carbide |
Y2 |
1650 |
2300 |
99 % SiC
Very low porosity. Excellent resistance to thermal shock, corrosion and abrasion at high temperatures. Recommendable for use in oxidizing and reducing atmospheres up to 1500 deg C |
Clay-bonded Silicon Carbide |
Y3 |
1500 |
1700 |
89 % SiC+8.5 % SiO 2 +0.7 % Al 2 O 3 +0.7 % Fe 2 O 3
Good heat conductivity. More accurate measurement than oxide-type tube can be expected.Excellentr resistance to thermal shock, porous. |
Nitride Bonded Silicon Carbide |
Y4 |
1550 |
1750 |
78 % SiC+3 % SiO 2 +18 % Si 3 N 4
Excellent performance similar to Y3 SiC but contains Si 3 N 4 .Most suitable for use in molten aluminum, reheating. |
Zirconia |
ZR 1706 |
1900 |
2400 |
100 % ZrO 2
Gas-tight and chemically stable against molten metals other than alkalis. Recommendable for use in molten special metals, slag and glass up to 1900 deg C |
