50 results about "Global climate warming" patented technology

The invention discloses an application of a double-layer composition of a silicon nitride ceramic and a glass material in an engine; an inner layer is a silicon nitride ceramic material layer in contact with a piston, and the thermal expansion rate of the silicon nitride ceramic material layer is equal to or lower than 5 (*10<-6 > / DEG C) when the temperature rises to 900 DEG C from 0-40 DEG C; the outer layer is a glass material layer wrapped with a silicon nitride ceramic material layer, the heat conductivity coefficient of the outer layer is smaller than 5 w / [(m*K)], the thermal diffusivity of the outer layer is smaller than 5 mm<2> / S, the thermal expansion rate of the outer layer is equal to or lower than 8(*10<-6> / DEG C) when the temperature of the outer layer rises to 800 DEG C from 0-40 DEG C, and the softening point temperature of the outer layer is higher than 800 DEG C. The outer layer comprises, in percentage by weight, 1-46% of aluminum oxide, 0-15% of magnesium oxide, 30-82% of silicon oxide, 0-15% of calcium oxide, and 0-15% of boron oxide. The double-layer composition can promote the progress of the engine and gas turbine industry, greatly enhance the heat efficiency, greatly enhance the horsepower of the engine under the same fuel oil, greatly save the energy, greatly reduce the carbon emission, and generate the new trend of slowing down the global warming.

The invention provides a preparation method for resin to replace home decoration materials. Through the first resin and the second resin, and through in-mold decorative injection molding, resin products with tile effect or wood board effect can be produced, and because the product volume is relatively thin It can be conveniently inlaid, installed, and inserted on furniture, walls and other decorative surfaces. Moreover, the quality of resin substitute home improvement materials is lighter than that of wood and ceramics, which can reduce the load-bearing capacity of the building in terms of handling; resin substitute home decoration materials can replace wood and reduce wood loss, and help the country control global warming, air pollution, and prevent natural disasters Make a contribution; the resin substitute home decoration material is not easy to corrode and be eaten by moths; and the water seepage is better; and the resin substitute home decoration material does not contain formaldehyde and other harmful substances to the body; the resin substitute home decoration material of the present invention is molded by injection mold, and has the advantages of production It has the advantages of high efficiency, low production cost, and more adaptable to the needs of users.

The invention discloses a method for maintaining the thermal stability of a permafrost foundation, which adopts solar adsorption refrigeration technology comprising the following steps: a, determining the thickness of a seasonal active layer of the permafrost foundation; b, burying a high-thermal conductivity material; c, burying and installing the solar adsorption refrigeration device; and d, exchanging heat in the foundation into the air with the solar adsorption refrigeration device so as to reduce the temperature of the permafrost foundation and maintain the thermal steady state. The invention also discloses the solar adsorption refrigeration device for use in combination the method, which comprises a solar thermal collector and a foundation evaporator, wherein the foundation evaporator is buried underground; and the upper end of the foundation evaporator is connected with absorption and desorption gas ducts which are connected through each pipeline and are connected with the solar thermal collector respectively. The method of the invention effectively relieves the influences of global warming on the permafrost foundation. The device of the invention is strong in practicability, simple in structure and conveniently buried, and can solve the problem that a thermal rod cannot work in warm seasons.

The invention discloses a chemical vapor deposition method for preparing diamond single crystal by adding N2O gas, and belongs to the technical field of diamond single crystal materials and preparation methods thereof. A microwave plasma chemical vapor deposition system is adopted. The method comprises the following steps of: putting a polished and ultrasonic cleaned single crystal diamond substrate into a deposition chamber, and introducing hydrogen, methane and laughing gas into the deposition chamber, wherein the flow ratio of H2: CH4: N2O is 750: 75-90: 2-10; and growing the diamond single crystal under microwave power of between 2 and 2.5kw, at the substrate temperature of between 900 and 1,100 DEG C and under air pressure of between 13 and 40kPa. The method is simple, and has the advantages of good quality, low cost, low pollution and the like; and under the condition that the increased N2O concentration affects the global climate warming effect remarkably increasingly, the method makes use of the waste gas, saves energy, reduces emission and promotes the production of diamond.