Carbolite Tube Furnaces

Carbolite Tube Furnaces
	Extensive range including rotating and vacuum models Temperatures up to 1800°C Excellent temperature uniformity Horizontal and vertical models Single and three zone versions Hinged designs for easy removal of process tube Work tube adaptors for atmosphere applications
Introduction
Carbolite's extensive range of tube furnaces is probably the most comprehensive available from a single source and includes wire heated tube furnaces to 1200°C, silicon carbide heated furnaces up to 1700°C and molybdenum disilicide heated elements for furnaces up to 1700°C. Tube furnaces at 1800°C are heated by lanthanum chromite elements. Carbolite tube furnaces offer precise temperature control, excellent temperature uniformity and the best solution for heating small work pieces. To achieve the most uniform temperature, both ends of the tube should be fitted with tapered ceramic end plugs or radiation shields.	Many models combine an integral control system, but most are also available with separate control systems particularly suitable for vertical use , either with a stand or in a test jig. Single and three zone control models are included in the range with the availability to have multi-zone control on custom built units. Many processes demand the use of a tube furnace from simple combustion techniques - ideal for carbon determination and organic analysis - to more sophisticated applications requiring accurate and uniform heating.

Safety Features - include either double skin construction or an outer mesh guard which promotes natural air cooling and protects the operator from hot surfaces. In the event of thermocouple malfunction, the control system automatically cuts power to the heating elements.

Energy Efficient - Low thermal mass insulation, combined with high quality heating elements and the latest microprocessor digital control systems, ensures maximum reliablity and performance.

Readily accessible controls, -
thermocouples, insulation and heating elements allow for easy maintenance.

Vertically loaded - tube furnaces need careful design of the sample support system and effective tube end insulation to prevent heat losses and convection air currents.

Controlled heating - and cooling can be obtained by the use of a programmer which ensures that the possibility of thermal shock is minimised.

Radiation shields can sometimes be used as insulation plugs for vacuum or dust free applications.

Both of these are carefully designed to avoid steep temperature gradients and thermal stresses which could crack the tube. It is advisable to either preheat the sample before loading or heat the sample and furnace simultaneously.

Clean and dustfree worktubes - to prevent contamination of samples.

Temperature indicators - A digital temperature indicator can be built into the furnace for use with a probe thermocouple. Alternatively, the indicator can be supplied in a separate housing with mains lead and thermocouple socket to be used as a portable temperature checker. a thermocouple probe can be inserted into the work tube to measure the temperature close to the workpiece.

Typical Tube Furnaces Applications Include:

Gas analysis

Materials research

Sintering and firing
of ceramics

Crystal growing

Continuous strip
and wire heating

Doping of silicon
wafers

Powder metallurgy

Calibaration of
thermocouples

Superconductor
research