40 results about "Rubidium nitrate" patented technology

Compositions are provided which, when burned, produce significant levels of infrared radiation, but only limited levels of visible radiation. The basic components of the compositions include a binder, an oxidizer, and a fuel, where the binder also acts the fuel. Preferred oxidizers include those compounds which produce large quantities of infrared radiation when the flare composition is burned. Such oxidizers include potassium nitrate, cesium nitrate, rubidium nitrate, and combinations of these compounds. Selection of the binder is important in order to provide the composition with the desirable characteristics identified above. The binder of the present invention does not produce significant soot. At the same time, the binder serves to form a composition which is processible, avoids chunking, and is compatible with the oxidizers used. It has been found that polymer binders which include relatively short carbon chains (1-6 continuous carbon atoms) are preferred. Examples of such polymers include polyesters, polyethers, polyamides, and polyamines.

This invention discloses a method for preparing titanate nanotubes. The method comprises: uniformly mixing nitrate and power of sodium titanate nanotubes at a mol ratio of (5-100):1, performing melt-reaction at 50-450 deg.C for 3-48 h, cooling, washing to remove unreacted nitrate, and drying to obtain titanate nanotubes. The nitrate is lithium nitrate, and drying to obtain titanate nanotubes. The nitrate is lithium nitrate, potassium nitrate, rubidium nitrate, cesium nitrate, silver nitrate, nickel nitrate, thallium nitrate, copper nitrate, zinc nitrate or cobalt nitrate. The precursor of sodium titanate nanotubes is prepared by: reacting titanium dioxide, metatitanic acid or titanate ester in 20-80 wt. % NaOH aqueous solution at 100-140 deg.C for 12-72 h, washing with water, filtering and drying. This invention can prepare titanate nanotubes with large specific surface area by melt-exchange method.

The invention discloses cesium-rubidium-potassium monolithic flameproof glass and a preparation method. The preparation method comprises a process of carrying out chemical strengthening on glass, wherein chemical strengthening is carried out by placing the glass in molten salts and carrying out ion exchange by a two-step method; in the first step, the molten salt is a mixture of potassium nitrate, rubidium nitrate, potassium fluoride and potassium hydroxide, the exchange temperature is 320-360 DEG C and the heat-insulation time is 2 hours; and in the second step, the molten salt is a mixture of potassium nitrate, cesium nitrate, aluminum oxide, boron fluoride, potassium carbonate and potassium phosphate, the exchange temperature is 500 DEG C and the heat-insulation time is 3 hours. The monolithic flameproof glass product prepared by the method is stable in quality and excellent in fire resistance; in the fire resistance test, the invalidation of the monolithic flameproof glass is caused by final softening and collapsing instead of heat bursting destruction; and the fire resistance time is 120 minutes.

The invention discloses an ultra-thin chemically strengthened glass and a preparation method thereof. In the present invention, the glass sample is soaked in the microwave hydrothermal environment of the ion exchange solution for ion exchange treatment, thereby obtaining chemically strengthened glass; the ion exchange solution is an aqueous solution made of potassium nitrate, potassium silicate, rubidium nitrate and cesium nitrate , in an ion exchange solution, K + The concentration is 27~40mol / L, Rb + The concentration of Cs is 0.5~4mol / L, Cs + The concentration is 1.5~4.5mol / L; the molar ratio of potassium nitrate to potassium silicate is 1:0.002~0.05; the microwave hydrothermal temperature is 300℃~350℃, and the ion exchange time is 4~10h. Compared with the molten salt method, the invention produces less pollution and energy waste; the stress depth of the chemically strengthened glass prepared by the invention reaches more than 45 μm; the surface stress intensity reaches more than 700 MPa, and has good light transmission.

The invention provides a compound rubidium boronitrate and rubidium boronitrate nonlinear optical crystal, preparation method and application thereof, and the chemical formula of the compound is Rb 3 B 6 O 10 NO 3 , with a molecular weight of 543.28, prepared by solid-phase synthesis or vacuum encapsulation; the chemical formula of the crystalline compound is Rb 3 B 6 O 10 NO 3 , the molecular weight is 543.28, it belongs to the trigonal crystal system, and the space group is P 3 2 21, the unit cell parameters are a =8.3764Å, b =8.3764Å, c =15.6901Å, α = β =90°, γ =120°, the unit cell volume is 953.3Å 3 , the frequency doubling effect of the crystal is about KH 2 PO 4 (KDP) 0.2 times, the UV cut-off edge is lower than 300 nm, and the crystal is grown by vacuum encapsulation method or cosolvent method.