Bottom Loading Furnace for LTCC Applications

The bottom loading furnace HF 450/10 LB DB200-2 was developed especially for debinding and sintering of LTCC (low temperature co-fired ceramics). The insulation of the furnace hood with high-quality fiber material makes fast process cycles possible. Multi-zone heating (side bottom, side middle and side top) ensures precise temperature control and optimum temperature uniformity in the workspace.

During the debinding phase, a fresh air fan supplies preheated fresh air into the furnace; the preheated air is distributed evenly throughout the chamber by perforated air inlet tubes on the side walls. This results in good heat transfer and improved temperature uniformity during the debinding process. In addition, the passive safety system DB200 reliably removes the exhaust gases from the furnace chamber by means of an exhaust gas fan. An independently adjustable gas inlet with gas injection system for clean and dry air allows the atmosphere to be adjusted during the sintering process above 600 °C. All process parameters, including temperature ramps and hold times, can be programmed.

• Tmax 1000 °C
• Dual shell ventilated housing made of textured stainless steel sheets for low surface temperature and high stability
• Exclusive use of insulation materials without categorization according to EC Regulation No 1272/2008 (CLP). This explicitly means that alumino silicate wool, also known as “refractory ceramic fiber” (RCF), which is classified and possibly carcinogenic, is not used.
• Passive safety system for debinding in air to 600 °C at max. 8 g/min
• Temperature uniformity in empty furnace according to DIN 17052-1
  • +/− 4 °C at 850 °C for workspace 1
  • +/− 1.5 °C at 850 °C for workspace 2
• Workspace 1 (maximum dimensions): 500 x 500 x 500 mm (w x d x h)
• Workspace 2 (reduced workspace for optimized temperature uniformity): 400 x 400 x 400 mm (w x d x h)
• Electrically driven table with fixed hood
• HiProSystems H1700, including Siemens PLC control system and 7" touchpanel as operating interface
• Defined application within the constraints of the operating instructions

• Catalytic post combustion to clean exhaust gases during debinding
• Connection box and thermocouple feed-through in the furnace table for additional documentation thermocouples 
• Control, visualization and documentation via Nabertherm Control Center (NCC)