The utility model relates to the technical field of
electric heating elements, in particular to a hot-pressed
silicon nitride ceramic electric heating element, which comprises two
silicon nitride ceramic substrates arranged up and down, an
electrode block and a heating tube, a tube groove is formed between the two
silicon nitride ceramic substrates, the heating tube is placed in the tube groove, and the
electrode block is arranged in the tube groove. A through groove is formed in the position, located at the front end of the
pipe groove, between the two
silicon nitride ceramic substrates, a power connection sleeve base is fixedly connected to the end of the heating
pipe, the power connection sleeve base is placed in the through groove, a power connection column fixedly penetrates through the end of the
electrode block, and the rear end of the power connection column is sleeved with the power connection sleeve base in a sliding mode; the rear end face of the electrode block is provided with an assembling groove, and the assembling groove is sleeved on the outer sides of the front ends of the two
silicon nitride ceramic substrates in a sliding mode, so that the two
silicon nitride ceramic substrates and the electrode block are convenient to disassemble, a damaged heating tube can be conveniently and independently replaced, and the later use and maintenance cost of the
electric heating element can be reduced.