32results about How to "Large coefficient of linear expansion" patented technology

The invention provides a polyester-aramid guide bearing, a thrust disc friction plate and a manufacturing method thereof. The invention is characterized in that the guide bearing made of polyester and aramid and the thrust disc friction plate form a friction pair; the outer part of the guide bearing is a tube wall, and a water flow groove is arranged in the tube wall; and the thrust disc frictionplate is arranged on a cast iron base. The manufacturing method comprises the following steps: drying polyester-aramid resin cloth soaked with polyvinyl butyral modified phenolic resin, extruding thecloth with a tube coiling machine, placing the cloth into a guide bearing compression die and a thrust disc friction plate formation die, and pressing for formation under the certain pressure and certain temperature. The invention improves the wear resistance and mechanical strength of the polyester-aramid guide bearing and the thrust disc friction plate manufactured in the method. Moreover, the polyester-aramid guide bearing and the thrust disc friction plate have the advantages of simple structure, low cost, less pollution, long service life and the like.

The invention provides a fireproof heat insulation coating. The coating mainly comprises, by mass, 15-30 parts of an inorganic nanometer composite adhesive, 5-10 parts of meerschaum, 10-15 parts of a hollow ceramic microsphere, 18-25 parts of nanometer silicon aerosol, 15-22 parts of nanometer ceramic fiber, 4-8 parts of rare earth, 1-2 parts of an assistant and 10-15 parts of water. The fireproof limit reaches 4h when a coat layer with the thickness of 24mm and of the fireproof heat insulation coating accords with a GB14907-2002 steel structure fireproof heat insulation coating; the heat conduction coefficient is below 0.030W / (m.K), so the coating is a novel heat insulation material for oil tanks, and can realize an energy saving effect; the liner expansion coefficient of the coating is large, so products coated with the coating have stable non-cracking and non-shedding mechanical properties under alternated cooling and heating conditions; and the coating can resist shock waves generated in the blasting process when a fire hazard occurs in order to avoid destroys of a paint film.

The invention discloses an acupuncture needle. The acupuncture needle comprises a needle point, a needle body and a needle handle, wherein the needle point is integrally connected to the front end of the needle body, the rear end of the needle body is fixedly nested in the needle handle, the needle point and the needle body are made from a stainless-steel material, and the needle handle is made from a macromolecular material. The macromolecular material is prepared from the following ingredients in parts by weight: 70-80 parts of polyethylene, 20-30 parts of polymethyl methacrylate, 5-10 parts of photostabilizer, 3-8 parts of glass fibers, 5-15 parts of filler and 5-10 parts of dispersant, wherein the photostabilizer contains nano-titania and nano zinc oxide which are in the weight ratio of 1: (0.5 to 2), and the filler contains nano calcium carbonate and nano-silica which are in the weight ratio of 1: (2 to 5). The acupuncture needle has the beneficial effects that the needle handle of the acupuncture needle has good oxidation resistance.

The present invention provides a spark plug capable of improving the wear resistance of an intermediate member and a melting portion. The spark plug includes: an intermediate piece composed of an alloy mainly composed of Ni and welded to the electrode base material in a state protruding from the electrode base material; a tip composed of an alloy mainly composed of Pt; into the fusion zone. The terminal contains: 6% by mass or more of Rh; at least one selected from the group R consisting of Rh, Re, Ir, Ru, W, Mo, and Nb; 5% by mass or more of Ni; At least one selected from the N group consisting of , Fe and Cu. Rh is the most contained in the R group, and Ni is the most contained in the N group. The total content of Pt, Rh, and Ni is 91% by mass or more, and the total content of Pt, R group, and N group is 95% by mass or more. The value obtained by dividing the content of the R group by the content of the N group is 0.7 or more and 8 or less.

The polarizing film of the present invention has a first resin film on one side of a polarizer having a thickness of 10 μm or less, and a second resin film on the other side, wherein the moisture permeability of the first resin film and the second resin film is 30 g / m. (m 2 ·Day) or less, there is a protective plate on the surface of the side opposite to the side which has the said polarizer of the said 1st resin film. The polarizing film of the present invention is formed by laminating resin films with extremely low moisture permeability on both sides of a polarizer with a thickness of 10 μm or less, which can suppress the deterioration of the polarizer due to humidification (humidification reliability), and even Generation of through cracks can be suppressed even under severe environments such as thermal shock.

On a surface of an anode member 12 having a valve action, a cathode layer 14 is formed, and at a terminal lead-out face 12a at one end of the anode member 12, an anode wire 16 is led out of it; thus a capacitor element 10 is formed. An anode terminal 4 is joined to the anode wire 16. A cathode terminal 5 is joined to the cathode layer 14. A protective layer 2 of resin covers part or all of the capacitor element 10. A packaging member 3 of resin harder than the protective layer 2 covers around the capacitor element 10 including the protective layer 2 and the anode wire 16 to form a package. The protective layer 2 has a larger linear expansion coefficient than the packaging member 3. The mass ratio of the packaging member 3 to the total mass of the packaging member 3 and the protective layer 2 between the terminal lead-out face 12a and the exterior face of the packaging member 3 opposite the terminal lead-out face 12a is 50% or more.

A fixing apparatus according includes: a heater that includes a substrate, a heating element provided on the substrate, and an electrode provided on the substrate and electrically connected to the heating element; and a power supply member that includes a first member bonded or coupled to the electrode to supply power to the heating element and a second member bonded or coupled to an opposite surface of the first member to a surface, which is bonded or coupled to the electrode, of the first member, wherein the heater generates heat by power supplied via the power supply member, and an image formed on a recording material is heated by heat of the heater; and a liner expansion coefficient of the first member is different from a liner expansion coefficient of the second member.

The invention discloses a processing method of an aramid fiber reinforced polytetrafluoroethylene holder. The aramid fiber reinforced polytetrafluoroethylene holder (1) comprises two lateral end faces (1.1), a pocket (1.2), an outer-diameter end face (1.3) and an inner-diameter end face (1.4); stable treatment I, semi-finish turning on the outer-diameter end face, semi-finish turning on the inner-diameter end face and stable treatment II are added on the basis of the conventional processing; a bakelite expander (2) is used in the semi-finish turning on the outer-diameter end face and semi-finish turning on the inner-diameter end face; the bakelite expander comprises a lathe clamping section (2.2) and a holder fixing section (2.3); and the whole processes of rough turning on the inner-diameter end face, rough turning on the outer-diameter end face, stable treatment I, turning on the two lateral end faces, semi-finish turning on the outer-diameter end face, semi-finish turning on the inner-diameter end face, distributing and drilling pocket, stable treatment II, finish turning on the inner-diameter end face, finish turning on the outer-diameter end face, and final detection are finally formed. The demands on the processing environment temperature are provided, so that the manufacturing percent of pass of the aramid fiber reinforced polytetrafluoroethylene holder is improved to 80% from below 20% in the prior art.

The invention relates to an extrinsic type Fabry-Perot sensor which comprises two segments of optical fibers, two segments of metallic plugging cores and metallic sleeves, wherein the inner side of each segment of the metallic plugging core is fixed with one segment of the optical fiber, the outer sides of the two segments of the metallic plugging core are encapsulated with the metallic sleeves, an end face group is oppositely formed on the end parts of the two segments of the optical fibers and / or the two segments of the metallic plugging cores, a hollow cavity is formed by the end face group and the metallic sleeves, and the end face group is coated with a reflecting film. Compared with the cavity structure of a common optical fiber method Fabry-Perot sensor manufactured by using capillary quartz glass, the cavity structure of the invention has the advantages of simple process, convenient manufacturing, low cost and the like.

The invention belongs to the protection field of high-temperature coatings, and in particular relates to an anti-oxidization and wear-resistance composite coating for four pipes of a power plant boiler. The composite coating comprises the following components in percent by weight: 70-80wt% of NiCoCrAlY and 20-30wt% of ZrC, wherein the thickness of the coating is 200-300mu m. During the preparation, by adopting a plasma spraying or supersonic speed flame spraying method, the NiCoCrAlY and ZrC with a certain proportion and granularity are stirred uniformly to form powder required by spraying, and a required coating is formed under a certain spraying process condition. The coating has high hardness at high temperature, and anti-oxidization, wear and corrosion properties of the coating are greatly improved, thus the defects of microcracks formed in the preparation process and the embrittlement of the existing coating are overcome, and the service life of the four pipes of the power plant boiler is greatly prolonged.