62 results about "Barium tetraborate" patented technology

Granules of a glass raw material mixture, for producing alkali-free glass containing substantially no alkali metal oxides, such that the glass composition of glass obtained from the granules comprises, as represented by mol % based on oxides, 60-75 mol % of SiO2, 5-15 mol % of Al2O3, 1-9 mol % of B2O3, 0-15 mol % of MgO, 0-20 mol % of CaO, 0-12 mol % of SrO and 0-21 mol % of BaO, provided that the total of CaO, SrO and BaO is more than 0, and in an X-ray diffraction spectrum of the granules obtained by means of a CuKα ray, when the diffraction peak area of quartz (100) in a range of 2θ being 19.85-21.71 degrees is taken as 1, the total of the relative values of the diffraction peak areas of strontium borate hydrate, calcium borate hydrate and barium borate hydrate, is at least 0.005.

The present invention relates to a barium tetraborate compound and a barium tetraborate non-linear optical crystal, and a preparation method and use thereof, wherein the chemical formulae of the barium tetraborate compound and the non-linear optical crystal thereof are both BaB4O7, with a molecular weight of 292.58; the barium tetraborate non-linear optical crystal has a non-centrosymmetric structure, which belongs to a hexagonal system, and has a space group P65 and lattice parameters of a=6.7233(6) Å, c=18.776(4) Å, V=735.01(17) Å3, and Z=6, wherein the powder frequency-doubled effect thereof is two times that of KDP (KH2PO4), and the ultraviolet cut-off edge is lower than 170 nm. The barium tetraborate compound is synthesized by a solid-phase reaction method; the barium tetraborate non-linear optical crystal is grown by a high-temperature molten solution method; and the crystal has a moderate mechanical hardness, is easy to cut, polish and store, and is widely applicable in the non-linear optics of a double-frequency doubling generator, an upper frequency converter, a lower frequency converter or an optical parameter oscillator etc.

An optical resonator fabricated from a uniaxial birefringent crystal, such as beta barium borate. The crystal is cut with the optical axis not perpendicular to a face of the cut crystal. In some cases the optical axis lies in the plane of the cut crystal face. An incident (input) electromagnetic signal (which can range from the infrared through the visible to the ultraviolet) is applied to the resonator. An output signal is recovered which has a frequency that is an integer multiple of the frequency of the input signal. In some cases a prism is used to evanescently couple the input and the output signals to the resonator.

The invention belongs to the field of ceramic production and particularly relates to a ground-glaze-free low-temperature transmutation zirconium white glaze formula, a preparation method and a use method thereof. The ground-glaze-free low-temperature transmutation zirconium white glaze formula includes feldspar powder, boric acid, barium borate, limestone, zinc oxide, lead oxide, lead silicate and bentonite. The glaze is low in cost, is convenient to use, is low in sintering temperature and has a unique artistic feel. Glaze surface produced by sintering the ground-glaze-free low-temperature transmutation zirconium white glaze has a zirconium white dark light bottom color, wherein irregular black spots are uniformly distributed on the glaze surface. The size and distribution density of the black spots are changed according to the model of a ceramic product and glaze thickness. The glaze surface has a stone-like appearance and a slight flowing-tendency effect, thereby achieving unique artistic effects. Porcelain produced with the glaze is increased in grade and market price and is high in economic value. The glaze can be produced in large scale, can be popularized quickly and is simple in use, thereby achieving strong market competitiveness.

The invention discloses an aqueous heat-insulation heat-preservation fireproof material. The aqueous heat-insulation heat-preservation fireproof material is prepared from the following components in percentage by weight: 8 to 20 percent of nano silicon oxide composite material obtained by compounding structurally-controlled nano silicon oxide powder and a nano silicon oxide cake material with an ultrahigh specific surface area according to a proportion of 0.5:(1-5):1, 3 to 15 percent of glass micro-beads, 4 to 10 percent of nano titanium oxide, 1 to 8 percent of potassium titanate, 1 to 8 percent of titanium pyrophosphate, 1 to 3 percent of aluminum hydroxide, 1 to 3 percent of zinc borate, 1 to 3 percent of barium borate, 1 to 3 percent of calcium sodium metasilicate, 1 to 10 percent of aluminum silicate, 20 to 28 percent of acrylic hybrid emulsion, 1.5 to 3 percent of other assistants, and the balance of water. According to the aqueous heat-insulation heat-preservation fireproof material disclosed by the invention, the nano silicon oxide composite material obtained by compounding structurally-controlled nano silicon oxide powder and the nano silicon oxide cake material with the ultrahigh specific surface area as a core material, and by the components and corresponding optimized improvement of the proportions, the product has a good heat-flow stagnation function; and the heat conduction coefficient of the product is not more than 0.03W / (m.K), and the waterproof performance reaches A level.