摘要:
Stabilizer compositions for halogen-containing polymers are provided composed of a .beta.-diketone as well as metal and organotin enolate salts thereof; and a hydrotalcite having the general formula:Mg.sub.1-x Al.sub.x (OH).sub.2 A.sub.x/2.mH.sub.2 Owhereinx is a number from 0 to 0.5;A is CO.sub.3.sup.= or SO.sub.4.sup.=, andm is a number representing the number of H.sub.2 O in the molecule.The stabilizer compositions are effective in enhancing the resistance to deterioration by heat and light of halogen-containing polymers and especially polyvinyl halide resins. The .beta.-diketone and hydrotalcite in these compositions exhibit a synergistic stabilizing effectiveness superior to either alone in like amount.
摘要:
This invention provides a reducing gas sensor which has a gas sensitive element of .gamma.-ferric oxide (.gamma.-Fe.sub.2 O.sub.3), a pair of electrodes and a heater element. The .gamma.-ferric oxide is in the form of a thin film, a plate or a thin surface layer on a sintered plate of .alpha.-ferric oxide. This invention also provides a method of producing the reducing gas sensor, which includes the steps of firing .gamma.-Fe.sub.2 O.sub.3, .gamma.-FeOOH or Fe.sub.3 O.sub.4 powder on a substrate and applying thereto a pair of electrodes and a heater element; or sintering alpha-ferric oxide (.alpha.-Fe.sub.2 O.sub.3) and reducing it to magnetite and oxidizing it at the surface thereof to .gamma.-ferric oxide as a gas sensitive element. The sensitivity (R.sub.A /R.sub.G) of the gas sensitive element of .gamma.-ferric oxide is 10 to 130.degree. at 270.degree. C in an atmosphere containing 0.1 to 1 percent by volume propane gas, and the reducing gas sensor has high sensitivity and stability.
摘要翻译:本发明提供一种还原气体传感器,其具有γ-氧化铁(γ-Fe 2 O 3)气体敏感元件,一对电极和加热元件。 γ-氧化铁是在α氧化铁烧结板上的薄膜,板或薄表面层的形式。 本发明还提供一种还原气体传感器的制造方法,其特征在于包括以下步骤:将γ-Fe 2 O 3,γ-FeOOH或Fe 3 O 4粉末烧在基片上,并施加一对电极和加热元件; 或烧结α-氧化铁(α-Fe 2 O 3)并将其还原成磁铁矿并将其在表面氧化成作为气体敏感元件的γ-二氧化铬。 在含有0.1〜1体积%丙烷气体的气氛中,γ-氧化铁气敏元件的灵敏度(RA / RG)在270℃为10〜130℃,还原气体传感器具有高灵敏度和稳定性。
摘要:
A porous fiber having sufficient chemical resistance to a variety of substances to be adsorbed, and having a large specific surface area and a large void percentage. The porous fiber provided by the present invention features a main fiber body formed of a high-density polyethylene having a melt flow rate of 0.3 to 20 g/10 minutes and numerous pores. The pores are formed by mixing the high-density polyethylene with a paraffin wax while they are melted, melt-spinning a fiber with an extruder at a draft ratio of 200 or less, stretching the fiber, heat-treating the stretched fiber, mechanically crimping it and then removing the paraffin wax. In the porous fiber, the main fiber body has a specific surface area of 20 m.sup.2 /g or more, the ratio of the pores to the main fiber body is 20% or more and the main fiber body has a size of not more than 50 denier.
摘要:
A method for detecting the presence of a reducing material in a gas phase which involves heating a gas sensor, which has, as a major part, a partially dehydrated iron hydroxide having electrodes applied thereto, to a temperature less than 500.degree. C and bringing the gas sensor in contact with the gas phase of the reducing material or a gaseous mixture containing the reducing material. The gas sensor can be easily fabricated, and when exposed to a reducing material it undergoes a rapid decrease in electric resistance.
摘要:
A voltage variable resistor is provided comprising a sintered body, electrodes on opposite major surfaces of the body and leads connected to the electrodes. The sintered body consists of zinc oxide and an additive comprising 0.05 to 15.0 mole % of one member selected from the group consisting of aluminum fluoride, beryllium fluoride, cerium fluoride, nickel fluoride and vanadium fluoride.
摘要:
An electrical capacitor according to the invention comprises a pair of electrodes and an electrically conductive material in contact therewith, at least one of the electrodes being of titanium-zirconium alloy, the electrode having an anodic dielectric oxide film thereon. The Ti-Zr electrode preferably comprises 40-90 atomic percent of Ti and 10-60 percent of Zr, and has a sintered porous structure. In one form, the electrically conductive material is MnO2; in another form, it is an aqueous solution of phosphoric acid, sulfuric acid, ammonium borate or potassium nitrite. A method of manufacture is also disclosed.
摘要:
A thermal adhesive vibration damping sheet comprising a sheet substrate having crystalline polyolefin particles attached to a surface thereof, said polyolefin particles having a mean particle size of 1 to 20 .mu.m and exhibiting an endothermic curve having a high temperature side endothermic peak in the range of from 50.degree. to 230.degree. C. as measured by a differential scanning calorimeter. The sheet has improved blocking resistance, adhesion to sheet steel through heat fusion, and impact resistance at low temperatures.
摘要:
Disclosed is a clutch disk comprising a clutch hub including a flange formed on an outer periphery thereof, the flange having a plurality of openings, a first side plate including a plurality of openings, a second side plate including a plurality of openings, a plurality of dampers disposed in the openings of the flange of the clutch hub, the first side plate and the second side plate, and including an elastic member tapering from wide to narrow in an axial direction thereof away from one end thereof to a central portion thereof and tapering from narrow to wide in an axial direction thereof away from the central portion thereof to another end thereof, and sheet members disposed on both ends of the elastic member, and a facing connected to one of the first side plate and the second side plate. Since the elastic members deform less in radial directions when the clutch disk operates, it is necessary to enlarge the sheet members in radial directions only by a miniumum required dimension in order to inhibit the elastic members from interfering with the flange of the clutch hub, and the first and second side plates. Thus, the clutch disk can be down-sized in an axial direction. Further, stresses caused by a rotational moment, can be reduced and inhibited from concentrating on the both ends of the elastic members. Thus, the durability of the dampers can be improved.
摘要:
An elliptical-shaped, plate type muffler holding member made of an elastic material having the structure of: a first holding part having a first through hole into which a supporting member of an automotive body side is to be inserted, a second holding part formed with a space between the first holding part and having a second through hole into which a supporting member of a muffler side is to be inserted, a pair of side parts connecting the first holding part and the second holding part at the both sides thereof, and a center connecting part positioned in the space between the first and second holding parts and integrally connected to each side part at the central portion thereof. According to the present invention, the muffler holding member has the center connecting part made of an elastic material and therefore, tensile and compression stresses are working in the center connecting part. In effect, the muffler holding member of the present invention is capable of lowering vibration transmissibility in any frequency level up to 800Hz required to an automobile.
摘要:
A method for making an electrolytic capacitor. A valve metal powder of the sponge type is compressed into a compact body and other usual steps including anodization and electrode application are carried out thereon. Mainly due to the use of sponge type valve metal powder, this method makes it unnecessary to carry out the conventionally employed step of sintering the compact body and produces an electrolytic capacitor having properties better than those obtained by the conventional method. This invention also provides an electrolytic capacitor characterized by the use of sponge type valve metal powder and specific lubricant materials.