Abstract: A heating electrode assembly for a crystal growth furnace includes: a heat insulation board unit that is disposed between a furnace wall and a heater, that includes a first surface facing the furnace wall and a second surface facing the heater, and that is formed with a hole extending through the first surface and the second surface; an electrode unit that includes an electricity input portion mounted to the furnace wall, a post portion disposed in the hole, and an abutment flange connecting the post portion and the heater; and an electrical insulating unit including a tubular sleeve that is disposed in the hole and that surrounds the post portion, and a pad that is clamped between the abutment flange and the second surface.

Abstract: A heating electrode assembly for a crystal growth furnace includes: a heat insulation board unit that is disposed between a furnace wall and a heater, that includes a first surface facing the furnace wall and a second surface facing the heater, and that is formed with a hole extending through the first surface and the second surface; an electrode unit that includes an electricity input portion mounted to the furnace wall, a post portion disposed in the hole, and an abutment flange connecting the post portion and the heater; and an electrical insulating unit including a tubular sleeve that is disposed in the hole and that surrounds the post portion, and a pad that is clamped between the abutment flange and the second surface.

Abstract: The present invention provides a radiation apparatus with capability of preventing heat convection, which comprises a blackbody furnace having a cavity therein and an air pressure adjusting unit. The air pressure adjusting unit coupled to the blackbody furnace for adjusting the air pressure of the open end of the cavity according to the temperature difference between the cavity and the outside environment. By means of the design of the present invention, it is capable of preventing heat convection between the cavity and the outside environment by utilizing the air pressure adjusting unit for controlling the air pressure status around the open end of cavity such that the blackbody furnace is stable for services of calibrations and tests.

Abstract: A ceramic heat conductor support disc for supporting an electrical heating element for electrically heated furnace installations. The support disc has a center aperture lying parallel to the longitudinal axis of the heating element, and one or more apertures located between the center aperture and the periphery of the disc. The disc is provided with one or more elongated openings running from the periphery to one of the apertures or to the center aperture, wherein each elongated opening penetrates the entire thickness of the disc.

Abstract: An electric heating element with radiant tube comprising a radiation pipe (1) and an electric heating element (2, 3) contained in said pipe, wherein the heating element has legs that run to and fro in the pipe, and wherein the heating element is connected at one end of the pipe close to a furnace wall with electric power outlets through which electric current is fed to the element, wherein the element is supported in the pipe by ceramic discs (9) that are provided with through-penetrating holes through which the legs of the elements extend, and wherein two elements (2, 3) are disposed sequentially in said radiation pipe along its long axis.

Abstract: A method of supporting vertically hanging electrical resistance elements for heating furnaces or ovens in industrial operations. Each resistance element includes current-conducting legs that extend downward and upward a number of times, and the element includes along its length a number of ceramic discs that are provided with through-holes through which respective element legs extend. The upper part of the element merges with terminals that are connected to a source of electric current. The element is supported by at least one of the uppermost ceramic discs, wherein the uppermost ceramic disc supporting the element is placed in the insulation of the furnace roof above the underside of the roof. The legs of the element are short circuited at a location slightly or somewhat beneath the underside of the furnace roof with the aid of short circuiting plates.

Abstract: A crenellated resistor made from a carbonaceous material and having the shape of a hollow cylinder for use in furnaces working at high temperature. The resistor is characterized by the thickness of the cylinder walls which follows a profile determined so as to produce an even temperature on the surface of the resistor when it is working. Thus, the wall has a radial thickness which decreases in a transition section from the peripheral edge to the internal edge. The resistor configuration allows elimination of hot spots which may appear when electricity flows through the resistor.

Abstract: A multi-apertured ceramic disk heat conductor support for use in a heating element for electrically heating industrial furnace installations. The ceramic disk has a center aperture extending between exterior surfaces on an axis of symmetry for receiving a supporting element. Further apertures extend are provided for receiving heat conductors. The further apertures are equidistantly disposed around at least one circle which is coaxial with the center aperture. The further apertures have a respective axial portion, and a respective widening portion at least at one end thereof which increases in diameter from the axial portion toward a respective exterior surface of the ceramic disk. A rounded transition region between the axial portion and the widening portion is provided and the length of the axial portion is less than one-half the thickness of the ceramic disk.

Abstract: An apparatus and a method for electrically heating a refractory lined process vessel or reactor by directly passing current through an electrically conductive refractory lining using electrical heating assemblies incorporating a resilient, convoluted nickel conductor. When the heating assemblies are attached to the electrically conductive refractory lining, an impressed voltage causes current to flow between the heating assemblies causing the refractory lining to be heated resistively.

Abstract: A silicon carbide whisker production apparatus manufactured by placing a plurality of lidded reaction vessels in the longitudinal direction of an Acheson furnace at intervals, packing graphite grains in the gaps between the adjacent reaction vessels and around the reaction vessels along the longitudinal direction of the furnace starting with the furnace-side ends of terminal electrodes to form a surrounding heating zone, and packing a heat insulating packing around the surrounding heating zone.

Abstract: The resistive elements are made up of strips of carbon/carbon composite material that are interconnected by connection pieces that are likewise made of carbon/carbon composite material and that serve both for making electrical connections and for making mechanical connections between the strips. The strips and the connection pieces are assembled together at least in part by means of their shapes. The resistive elements may be coated in a layer of pyrocarbon.

Abstract: An improved electric resistance heating element made of a carbon material, provided around its surface with a layer essentially comprising carbon fiber, and an improved electric resistance heating furnace using the heating element.

Abstract: A high temperature melting furnace including a fibrous refractory cylindrical shell with a fibrous refractory top and a bottom composed of similar material. Heating is provided by molybdenum disilicide resistance wire loops hanging inside the shell. The furnace top has a removable closure plug for access to the furnace when in operation and the furnace bottom has a verticle charging hole with a removable pedestal insertable therein.