Abstract: Provided is a heat conversion device, including: a unit thermoelectric module including a first semiconductor element and a second semiconductor element; and a heat conversion module performing heat conversion by coming into contact with the unit thermoelectric module, wherein the heat conversion module includes: a heat conversion substrate coming into direct contact with at least any one of one end and the other end of the first semiconductor element or the second semiconductor element; and a radiating unit disposed on the heat conversion substrate.

Abstract: Provided is a thermoelectric material including metal oxide powder and thermoelectric powder. Thus, an internal filling rate is improved so that a Peltier effect can be maximized according to the increase of electrical conductivity and a Seebeck coefficient and the reduction of thermal conductivity, thereby enabling the improvement of the figure of merit (ZT) of a thermoelectric element.

Abstract: Provided is a thermoelectric module, including: a first substrate and a second substrate disposed to face each other; at least one unit thermoelectric element composed of a pair of semiconductor elements including a P-type semiconductor element and an N-type semiconductor element disposed in an internal area between the first substrate and the second substrate disposed to face each other and having respective ends electrically connected to each other via electrodes; and at least two kinds of sealing parts having different thermal conductivities and coated on at least one area of the internal area between the first substrate and the second substrate disposed to face each other.

Abstract: A paste composition for a rear electrode of a solar cell according to an embodiment comprises conductive powder including a first powder having a first mean particle diameter, a second powder having a second mean particle diameter larger than the first mean particle diameter, and a third powder having a third mean particle diameter larger than the second mean particle diameter, and an organic vehicle.

Abstract: An ultraviolet (UV) curable resin composition is provided which includes 25 to 45 parts by weight of a modified epoxy acrylate oligomer; and 10 to 25 parts by weight of a urethane acrylate oligomer. Further provided is a metal sheet that is transparent and corrosion resistant, impact resistant, scratch resistant, adhesive, anti-corrosive, and bendable (workable) by forming a coating film on the surface of a metal material such as a steel material, specifically a steel sheet, using the UV curable resin composition mentioned above.

Abstract: Provided are a paste for contacts and a solar cell using the same. The paste for contacts includes Al powder, glass frit, inorganic binder, and P-type oxidation containing I group elements.

Abstract: A paste composition for a rear electrode of a solar cell according to the embodiment includes conductive powder; an organic vehicle; and an additive including silicon or a metal.

Abstract: A paste composition for an electrode of a solar cell according to the present invention comprises a conductive powder, an organic vehicle, and a glass frit, and the glass frit includes a first glass frit having a first glass transition temperature and a second glass frit having a second glass frit temperature lower than the first glass transition temperature.

Abstract: A paste composition for a rear electrode of a solar cell according to an embodiment comprises conductive powder including a first powder having a first mean particle diameter, a second powder having a second mean particle diameter larger than the first mean particle diameter, and a third powder having a third mean particle diameter larger than the second mean particle diameter, and an organic vehicle.

Abstract: Provided is a paste composition for front electrode of a solar cell. The paste composition includes conductive power, an organic vehicle, a glass frit, and an additive. The additive includes at least one material selected from the group consisting of Zn, Sb, V, W, Cr, Cd, Re, Sn, Mo, Mn, Ni, Co, Cu, and metal oxide including one of the foregoing materials.

Abstract: An ultraviolet (UV) curable resin composition is provided which includes 25 to 45 parts by weight of a modified epoxy acrylate oligomer; and 10 to 25 parts by weight of a urethane acrylate oligomer. Further provided is a metal sheet that is transparent and corrosion resistant, impact resistant, scratch resistant, adhesive, anti-corrosive, and bendable (workable) by forming a coating film on the surface of a metal material such as a steel material, specifically a steel sheet, using the UV curable resin composition mentioned above.

Abstract: Disclosed herein is a once-through boiler capable of achieving a steep increase in temperature of steam via reheating of the steam within a combustion chamber, thereby improving heat and energy efficiency. The boiler comprises a body (110), a steam supply unit (120), and a heating unit (130). The body includes a housing (111), a cover (112), and a guide pipe (113). The steam supply unit includes an annular water tank (122) in a lower region of the body, a steam supply chamber (124) in an uppermost region of the body, water pipes (121) amounted on the water tank, a low-temperature steam inlet pipe (125) and a high-temperature steam outlet pipe (127) mounted at opposite sides of the water pipes, and a steam heating pipe (126) to communicate the inlet pipe with the outlet pipe. The heating unit includes a burner (131), and a combustion chamber (132).

Abstract: Disclosed herein is a once-through boiler capable of achieving a steep increase in temperature of steam via reheating of the steam within a combustion chamber, thereby improving heat and energy efficiency. The boiler comprises a body (110), a steam supply unit (120), and a heating unit (130). The body includes a housing (111), a cover (112), and a guide pipe (113). The steam supply unit includes an annular water tank (122) in a lower region of the body, a steam supply chamber (124) in an uppermost region of the body, water pipes (121) amounted on the water tank, a low-temperature steam inlet pipe (125) and a high-temperature steam outlet pipe (127) mounted at opposite sides of the water pipes, and a steam heating pipe (126) to communicate the inlet pipe with the outlet pipe. The heating unit includes a burner (131), and a combustion chamber (132).