Abstract:
PURPOSE: A separator for planar solid oxide fuel cells is provided to increase physical contact between an cathode and the separator and to improve a function of collecting electricity by increasing electrical connection. CONSTITUTION: A method for manufacturing a separator for planar solid oxide fuel cells comprises the following steps: forming a protective coating layer(9b) of (Mn,Co)_3O-4 oxides on the surface of a metal separator(5) for a planar solid oxide fuel cell; inserting a contact member which is composed of cobalt and cobalt alloy between the protective coating layer and an cathode(4); thermally treating the protective coating layer at reductive atmosphere; and forming a bond reactive layer(9c) between the protective coating layer and the contact member.
Abstract:
A bipolar plate for a solid oxide fuel cell is provided to realize improved oxidation resistance and high-temperature conductivity by forming an oxide with excellent conductivity on the surface of a substrate. A bipolar plate for a solid oxide fuel cell comprises: a metal substrate; and a coating layer formed on the metal substrate, wherein the coating layer comprises a cobalt(Co)-metal(M) alloy(wherein M is a rare earth metal element). The metal substrate includes a ferrite-based stainless steel sheet. The metal(M) is selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and a combination thereof.
Abstract:
본 발명은 고체산화물 연료전지 금속연결재의 특성을 향상시키기 위하여 고체산화물 연료전지 금속연결재용 기판인 페라이트계 스테인레스 강판 표면에, 코발트질산염:5~25중량%, 란탄질산염:0.1~2중량%, 잔부 바인더, 경화제 및 물로 이루어진 코팅용액을 요구특성에 맞는 두께로 도포하여 코팅층을 형성하는 것을 특징으로 하는 고체산화물 연료전지 금속연결재용 Fe―Cr합금 코팅방법을 제공한다. 본 발명에 따르면 이미 제조된 페라이트계 스테인레스 강판의 표면에 코발트질산염과 란탄질산염을 적절히 혼합한 코팅용액으로 코팅층을 형성함으로써 용액안정성, 밀착성, 고온전도성이 우수한 고체산화물 연료전지 연결재를 제조할 수 있다. 고체산화물, 연료전지, 금속연결재, 코발트질산염, 란탄질산염
Abstract:
개시된 발명은 고온의 가스 분위기에서 전도성 코팅막의 전도도 측정장치에 관한 것으로, 백금 메쉬와 백금 와이어를 매번 용접하지 않고 측정할 때마다 백금 메쉬를 사용하지 않으며, 실제 고체산화물 연료전지의 가스분위기를 모사하며, 백금 페이스트와 백금 메쉬를 연결할 필요가 없도록 한 것이다. 이를 위하여 본 발명은 전도도를 측정하고자 하는 금속 기판에 전도성 코팅막을 형성한 측정 시편과; 알루미나 세라믹 갑의 안쪽에 다수의 가스 채널부를 가공한 백금전극 게이지가 형성되고, 상기 알루미나 세라믹 갑의 양측면에 매몰 백금 와이어가 각각 형성되어 상기 내부의 백금전극 게이지가 상기 매몰 백금 와이어를 통해 외부 단자와 전기적으로 연결되도록 구성되며, 상기 측정시편의 양측에 각각 압착되는 두 개의 전도도 측정 게이지와; 상기 전도도 측정 게이지에 전원을 공급하고 측정시편에 걸리는 전압을 측정하는 파워 서플라이 및 전압계로 구성되는 고온의 가스분위기에서의 전도도 측정장치 및 그의 제조방법을 제공한다.
Abstract:
PURPOSE: A separation plate for a molted carbonate fuel cell, a heat treatment method of the separation plate and a molten carbonate fuel cell containing the separation plate are provided, to improve the corrosion resistance and to enable a ferritic stainless steel of a low cost to be used as a separation plate of a fuel cell. CONSTITUTION: The separation plate(50) is made of a stainless steel plate provided with a gas channel part(52) and a wet sealing part(54), wherein the wet sealing part(54) is made of an aluminum coating layer and the aluminum coating layer is made of AlFe single phase. Preferably the stainless steel is austenitic stainless steel or ferritic stainless steel. The heat treatment method comprises the steps of coating the wet sealing part of the stainless steel plate with aluminum; and heating the coated plate at a temperature of 840-880 deg.C under the vacuum of 10¬-4 torr or less, to make the aluminum coating layer be single phase.
Abstract:
PURPOSE: A pretreatment composition for the coating of coated steel is provided, which is free from chromium, and is improved in the working environment and reduced in the environmental pollution. CONSTITUTION: The pretreatment composition comprises 0.1-5 wt% of methoxy silane; 0.1-0.6 wt% of a water-soluble organic titanate; 0.1-0.6 wt% of phosphoric acid; optionally 0.1-0.5 wt% of a molybdate; and the balance of water. Preferably the molybdate is Na3PO4· 12MoO4. Optionally the composition comprises further water-soluble vanadate up to 0.1 wt%, and/or aqueous acryl-based resin up to 5 wt%.
Abstract:
PURPOSE: Provided is a chromium-free surface treatment composition for galvanized steel is provided, which does not harm to human and has good corrosion resistance. CONSTITUTION: A chromium-free surface treatment composition for galvanized steel comprises (a) at least one metal salts selected from the group consisting of colloidal silica, methoxy silane, polyvinyl alcohol, molybdate and vanadate, and (b) a balance of water, wherein colloidal silica, methoxy silane, polyvinyl alcohol are mixed in a weight ratio of 1:0.01 to 0.3:0.15 to 0.5; molybdate content in the chromium-free surface treatment composition is 0.1 to 0.8 wt.%; vanadate content in the chromium-free surface treatment composition is 0.02-0.5 wt.%.
Abstract:
PURPOSE: A pre-plating process for aluminized stainless steel sheets suitable for use in exhaust manifold of automobiles or suitable for use under corrosive atmosphere is provided, which is characterized in that Fe-C layer is formed on stainless steel sheet to improve wettability before aluminum melt is applied. CONSTITUTION: The method includes the steps of forming a plated layer consisting of C 0.0005 to 0.3 wt.% and a balance of Fe in the thickness of 0.1 to 2 g/m¬2 on a steel sheet containing at least one element selected from Cr less than 30 wt.% and Si 0.3 to 5.0 wt.%; applying aluminum melt on the Fe-C plated layer, wherein the thickness of the plated layer satisfies below inequality: t>=0.07Cr(wt.%)-0.07.
Abstract:
PURPOSE: A continuous pelletizing apparatus for recycling Pbs powder is provided which efficiently and continuously pelletize Pbs powder which is a byproduct generated during the process of recovering lead by recycling waste batteries of automobile so that the Pbs powder is easily charged into a blast furnace. CONSTITUTION: The continuous pelletizing apparatus for recycling Pbs powder comprises a weighing sensor(3) which is installed at the lower part of a hopper(19) so as to measure a charging amount of the Pbs powder; a carrier(2) the upper part of which is opened so that the Pbs powder in the hopper(19) is charged into the carrier, the lower part of which opened or closed by a slidable shutoff plate(5), and which is horizontally movably installed on a guide rail(14); a lower mold(7) into the body of which plural forming holes(7a) are penetrated, and which is installed on a horizontally movable lower mount(9), wherein the Pbs powder is charged into the forming holes from the carrier(2); an upper cylinder(6) which is equipped with plural pressurizing rods(6a) and fixed onto the direct upper part of the lower mold(7), wherein the pressurizing rods(6a) are ascended or descended by being corresponded with each of the forming holes(7a); and a conveyor belt for transferring pellets of the Pbs powder compressed in the forming holes(7a).