Abstract:
PURPOSE:To neutralize space charge by utilizing an ionization phenomenon due to high frequency discharge and controlling the quantity of ions produced by this phenomenon according to a high frequency voltage, frequency and sealed gas pressure. CONSTITUTION:A high frequency voltage is applied from a high frequency power source 14 through a coupling condenser 15 between an emitter 11 and a collector 12. A continuous ionization phenomenon is generated between the emitter 11 and the collector 12 by utilizing a high frequency discharge caused by this phenomenon. The quantity of generated ions by this phenomenon is optimized according to a high frequency voltage, frequency and sealed gas pressure, thereby neutralizing the space charge. In this manner, the output of the thermionic geneneration can be increased, and the efficient can be improved.
Abstract:
PROBLEM TO BE SOLVED: To provide a thermoelectric power generation element having high power generation performance, and to provide a method of manufacturing a thermoelectric power generation element.SOLUTION: A method of manufacturing a thermoelectric power generation element (1) for converting thermal energy into electric energy by utilizing thermions moving between an emitter electrode (5) and a collector electrode (7) is provided. In the manufacturing method, a first step for forming at least one of the emitter electrode (5) and collector electrode (7) includes a first step for forming, on a base material (13, 19) composed of a metal, a carbide layer (15, 21) composed of a carbide of the metal by a vapor phase synthetic method, a second step for forming an N type diamond layer (17, 23) added with donor impurities by a vapor phase synthetic method, and a third step for terminating the surface of the N type diamond layer (17, 23) with hydrogen.
Abstract:
PROBLEM TO BE SOLVED: To provide a thermoelectric power generation element which can reduce current leakage between electrodes and also can guarantee output power per unit area.SOLUTION: The thermoelectric power generation element comprises: an emitter electrode 1 which emits thermoelectrons from a thermoelectron emission surface 1a when heat is applied thereto from a heat source; a collector electrode 2 disposed apart by a certain interval from the emitter electrode 1, which moves the thermoelectrons emitted from the emitter electrode 1 via a counter surface 2a disposed oppositely to the thermoelectron emission surface 1a; and an insulating substrate 4 which has one surface 4a perpendicular to the thermoelectron emission surface 1a and the counter surface 2a. The emitter electrode 1 and the collector electrode 2 are mutually in contact with one and the same insulating substrate 4 and are electrically insulated from each other by the insulating substrate 4.
Abstract:
PROBLEM TO BE SOLVED: To provide a thermionic electricity-generating element having increased electromotive force using a diamond semiconductor. SOLUTION: An emitter electrode 1 uses a p-type diamond semiconductor, and a collector electrode 2 uses an n-type diamond semiconductor. For example, when boron is added to a diamond semiconductor thin film 1b of the emitter electrode 1, an acceptor level is present at approximately 5.1 eV from a conduction band and when nitrogen is added to a diamond semiconductor thin film 2b of the collector electrode 2, a donor level is present at approximately 1.7 eV from the conduction band. A difference in fermi level therefore becomes large to approximately 3.4 eV and the electromotive force can be made large. Thus, the thermionic electricity-generating element is obtained which has the increased electromotive force using the diamond semiconductor. COPYRIGHT: (C)2011,JPO&INPIT