Honeycomb type heating device and method for using the same

A honeycomb type heating device comprising:

• a pillar-shaped honeycomb substrate including a partition wall defining and forming a plurality of cells extending from one end face to the other end face, and a circumferential wall surrounding the partition wall;
• a plurality of heaters arranged adjacent to each other on a circumferential surface that is an outer surface of the circumferential wall in a circumferential direction of the circumferential surface;
• a connecting body arranged in the circumferential direction of the circumferential surface and electrically connecting the plurality of heaters to each other;
• and
• a metal case housing the honeycomb substrate, the plurality of heaters, and the connecting body,
• wherein each of the heaters is a resistance-heating type heater which generates heat by energization,
• a sectional area of the connecting body in a cross section perpendicular to the circumferential direction of the circumferential surface is 10.0 to 30.0 mm2, and
• a thermal expansion coefficient of the connecting body is larger than a thermal expansion coefficient of the honeycomb substrate by 3.0×10-6/° C. or more.