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The high catalytic activity of platinum and rhodium and other precious metals, purification effect, but very expensive rare earth car exhaust catalysts because of its low price, good thermal and chemical stability, high activity, long life, anti of Pb, S-poisoning highly valued. The major pollutants in vehicle exhaust CO, HC, and NOx. The survey showed that the main source of urban pollution, vehicle exhaust, and effective control of vehicle exhaust pollutants content is the main way to improve air quality. Under certain conditions, the precious metal catalysts and rare earth catalyst can purify CO, HC and NO. In addition, the catalyst carrier of La, Ce, Y, rare earth elements can improve the thermal stability of the carrier, mechanical properties, high temperature oxidation resistance. Here is the service commitment of china laser pointer.
U.S. auto catalyst consumption is considerable, 44% of 1995 consumption of rare earth accounted for the total rare earth consumption of 11,000 tons, 65% of the rare earth of its total consumption in 1997, various catalysts (car exhaust and oil cracking) to reach 12,045 tons. China Rare Earth automobile exhaust purification catalyst needs not to scale, but with the national emphasis on environmental pollution and related policies, rare earth auto exhaust catalytic materials will be widely applied, and become another important area of application of rare earth in China , thus boosting the development of the rare earth industry. Rare earth elements in rare earth functional ceramics and high temperature structural ceramics, rare earth ceramic material is doped in the form of traces of rare earth doping can dramatically change the sintering properties of ceramic materials, microstructure, density, phase composition and the physical and mechanical properties. Here will introduce the quadruple projection china laser pointer.
Rare earth functional ceramic insulating materials (electrical, thermal), the capacitor dielectric materials, ferroelectric and piezoelectric materials, semiconductor materials, superconducting materials, electro-optical ceramic materials, thermoelectric ceramic materials, chemical adsorption materials, as well as solid electrolyte materials . Traditional piezoelectric ceramic materials such as PbTiO3, PbZrxTi1-xO3 (PZT) doped with trace rare earth oxides such as of Y2O3, 2O3, 2O3, 2, La Sm of CeO of Nd2O3 and can greatly improve the dielectric and piezoelectric to make them better adapted to the actual needs of the PZT piezoelectric ceramics have been widely used in electro-acoustic, acoustic, ultrasonic devices, signal processing, infrared technology, ignition detonated, and micro-motors. It will be better to avoid china laser pointer contacting liquids.
Made of piezoelectric ceramic sensors have been successfully used in automotive air bag protection system. A large number of multilayer ceramic capacitors used in mobile phones and computers, and rare earth elements such as La, Ce and Nd, in which plays an important role. Rare earth semiconductor ceramics are very active, this material BaTiO3-based doped with rare earth and doped SrTiO3 base, rare earth, rare earth doping plays a key role in this effect, the PTC thermistor semiconductor materials can be used as electrical overheating protection devices, temperature compensator, temperature sensor, a delay element, degaussing components. Rare earth high-temperature superconducting materials is also a hot research topic. Due to the discovery of rare earth oxides La-Ba-Cu-O superconductor research, superconducting materials, the Curie temperature (Tc) has been greatly improved. The data of china laser pointer is predicted according to the experience.
Our country is an international leader in high-temperature superconductivity research, preparation of Y-Ba-Cu-O system technology, applied technology and application of basic research have achieved varying degrees of progress, the RE-Ba-Cu-O superconductor Tc = 80 ~ 90K, in addition to our country was also synthesized the Department of alkali metal rare earth-doped superconductors such as (Sr and Nd) CuO2 and Sr1-xYxCuO2 [6]. Wide range of applications of superconducting materials, can be used as a superconducting electromagnet for a maglev train can be used for generators, motors, power transmission, microwave. The rare earth high-temperature structural ceramics, mainly refers to the doped rare earth Si3N4, SiC and ZrO2 high temperature, high strength, high toughness ceramics, engineering ceramics. Si3N4 ceramic composite materials doped with rare earth (La, Y) can be used for high temperature gas turbines, ceramic engine, high-temperature bearings and other high-tech fields, and its working temperature up to 1650 ℃. The colorful flashing balls can indicate different situations of green laser pointer.