1468 results about "Space group" patented technology

The invention discloses a sodium ion secondary battery, an active substance, a positive electrode and a negative electrode used by the sodium ion secondary battery, and a preparation method of the active substance. The space group of the active substance is Pbam, and the chemical general formula of the active substance is Nax[Mn(x-y)Ay]Ti1-xO2-delta, wherein A is one of Al, Fe, Ni, Cu, Zn, Co, Mo, V and Cr, x is more than 0.2 and less than 0.8, y is not less than 0 and not more than 0.1, and delta is not less than 0 and not more than 0.05. The active substance of the sodium ion secondary battery can be used as a positive electrode material and can be further used as a negative electrode material; when the active substance is used as the positive electrode, the sodium storage voltage is between 2.6-3.6V, and the average voltage is 3.0V; when the active substance is used as the negative electrode, the sodium storage voltage is between 1.5-2.6V, and the average voltage is 2.0V; the average working voltage of a total battery constructed by using the active substance as the positive electrode and the negative electrode is 0.8V.

A metering system (1) for grouping and spacing articles (A) that are initially in a stream of articles passing within a working reach of the metering system, which metering system comprises a plurality of tools (10), which tools are arranged and adapted to be brought into contact with and subsequently accelerate some portion of the article stream, thereby to create a spaced group, wherein each tool comprises an integral drive means that is controllable independently of the integral drive means of each other tool.

The invention provides a compound cesium fluoborate, a nonlinear optical crystal with the cesium fluoborate, methods for preparing the compound cesium fluoborate and the nonlinear optical crystal and application of the compound cesium fluoborate and the nonlinear optical crystal. A chemical formula of the compound is CsB<4>O<6>F, the molecular weight of the compound is 291.15, and the compound is of a crystal structure and is prepared by the aid of solid-phase synthesis processes or vacuum packaging processes. A chemical formula of the nonlinear optical crystal is CsB<4>O<6>F, the molecular weight of the nonlinear optical crystal is 291.15, the nonlinear optical crystal belongs to orthorhombic crystal systems, space groups of the nonlinear optical crystal are Pna2<1>, crystal cell parameters of the nonlinear optical crystal include that an a is equal to 7.9241 , a b is equal to 11.3996 , a c is equal to 6.6638 and an alpha, a beta and a gamma are equal to 90 degrees, and the unit cell volumes of the nonlinear optical crystal are 601.95 <3>. Frequency doubling effects of the nonlinear optical crystal is approximately two times frequency doubling effects of KH<2>PO<4> [KDP (potassium dihydrogen phosphate)], and ultrasonic absorption edges of the nonlinear optical crystal are shorter than 190 nm. The nonlinear optical crystal is grown from the CsB<4>O<6>F by the aid of melt processes, high-temperature solution processes, vacuum packaging processes, hydrothermal processes or room-temperature solution processes. The compound cesium fluoborate, the nonlinear optical crystal, the methods and the application have the advantages that the nonlinear optical crystal is free of deliquescence in air, is good in chemical stability and can be applied to all-solid-state laser devices as an ultraviolet nonlinear optical crystal or deep ultraviolet nonlinear optical crystal.

An adsorbent composition comprising a nanostructured titanium oxide material of the formula TiO2−, where 0≦x≦1 with nanotubular and / or nanofibrilar morphology, high oxygen deficiency, having an orthorhombic JT crystalline phase described by at least one of the space groups 59 Pmmn, 63 Amma, 71 Immm or 63 Bmmb, and comprising between 0 and 20 weight percent of a transition metal oxide is used for the selective adsorption of nitrogen compounds and / or sulfur compounds from light and intermediate petroleum fractions.