A modular platform electric trench heater is provided. The electric trench heater has a case having a first end and a second end, an electrical heating unit disposed in the case and designed to generate heat and create an upward convection current therethrough, a baffle dividing the case in a longitudinal direction into a first portion and a second portion, wherein the baffle is designed to direct the upward convection current from the first portion of the case to the second portion of the case, and a connecting unit provided in the form of a connecting plate and a plate fixing mechanism that couples the connecting plate to the first end of the case.

A conductive honeycomb structure that is divided into four equal portions in a flow path direction of cells in the structure to form four regions of A, B, C, and D from a side closer to a first end face, and an average value of electric resistances measured between two points in each of the four regions is represented as R.sub.A, R.sub.B, R.sub.C, and R.sub.D in this order from the side closer to the first end face. A relational expression of R.sub.AR.sub.BR.sub.CR.sub.D (excluding R.sub.A=R.sub.B=R.sub.C=R.sub.D) is satisfied provided that the two points being determined so that a distance between a pair of electrode layers arranged on an outer peripheral side wall of the structure is the longest in the cross section perpendicular to the flow path direction of the cells.

A honeycomb structure including a honeycomb having porous partition walls extending between inflow and outflow end faces to define cells, an outermost peripheral wall, and a pair of electrodes disposed on a side surface of the honeycomb. Each electrode is formed in a strip shape extending in a direction of the cells. In a cross section orthogonal to the extending direction of the cells, one electrode is disposed on a side opposed to the other electrode. The honeycomb has an outer peripheral region including the outer peripheral wall, a central region, and an intermediate region. An average electric resistivity A of a material constituted of the outer peripheral region, an average electric resistivity B of a material constituted of the central region and an average electric resistivity of C of a material constituted of the intermediate region satisfy the relationship: AB<C.

Problem to be Solved

To provide a heat-generating device capable of efficiently maintaining heat generation for a long time at a low cost while saving power.

Solution

The heat-generating device includes: a hollow vessel having an electrically insulated inner part; a pair of counter electrodes housed inside the vessel, and separated from and opposing each other; and a heat-generating body housed between the counter electrodes inside the vessel, and composed of silicon powder and carbon powder in a mixed state.

A conductive honeycomb structure includes: a pillar honeycomb structure portion including an outer peripheral side wall and partition walls, each of the partition walls extending through the pillar honeycomb structure from a first end face to a second end face to define a plurality of cells forming a through channel of a first fluid; a pair of electrode portions disposed in contact with an outer surface of the outer peripheral side wall across a central axis of the honeycomb structure portion; and a pair of terminal connecting portions formed on the outer peripheral side wall, each of the terminal connecting portions being at least partially covered with each of the electrode portions. Each of the electrode portions includes band-shape first, second and third electrode layers each having a predetermined electrical resistance.

This SiC heater includes a heating element having a thin plate-shaped silicon carbide sintered body and an insulating coat film formed on a surface of the silicon carbide sintered body, a pair of electrodes for conducting electricity in the heating element, and a heater base that holds the heating element from one surface side while insulating the heating element from heat from the heating element, the insulating coat film is located on a surface of the silicon carbide sintered body opposite to the heater base, an electrical resistivity at room temperature of the insulating coat film is 10.sup.9 .Math.cm or more, a thermal expansion coefficient of the insulating coat film is 210.sup.6/K or more and 610.sup.6/K or less, SiO.sub.2 is included as a matrix, 1% by weight or more and 35% by weight or less of a first additive component including at least one of B.sub.2O.sub.3 and Al.sub.2O.sub.3 is contained, and 1% by weight or more and 35% by weight or less of a second additive component including at least one of MgO and CaO is contained.

An aerosol generator comprises: a reservoir configured to contain a liquid medium; a heating body comprising a plurality of channels and an electrically-conductive sheet, the sheet having a first surface and an opposite second surface; and an electric power unit configured to inject pulses of electric current through the sheet. The channels are disposed in the sheet and extending through the sheet from the first surface of the sheet to the opposite second surface of the sheet. The channels are configured for providing directional flow of a vapor from the channels. In some embodiments, the channels have variable width along the length. The sheet material includes heavily doped silicon. The electric power unit provides correlation of the pulse parameters with the thermal time constant of the heating body for pulsed operation of the heating body. The aerosol generator produces dense inhalable aerosol at reduced hazardous risks and is manufactured more standardized at a low cost.

A composition for forming a heating element; a dried and sintered product thereof; and a method of preparing the composition for forming a heating element, the composition including a matrix particle, a composite filler, and a solvent, wherein the composite filler includes a core and a coating layer disposed on the core, the core includes a nanosheet filler, and the composition has a pH in a range of about 5 to about 9.

A vaporisation device for an inhalator comprising an electrical resistance heating element for the vaporisation of liquid brought into contact with the resistance heating element by means of electrical energy. The resistance heating element consists of a material in which the resistance change per temperature interval, in a temperature range around a vaporisation temperature, is at least three times as large as in a temperature range around room temperature.

A system for processing substrates is described. In one embodiment, the system comprises a process chamber, at least one electrical resistance heater, and at least one Coanda effect gas injector.