34 results about "Indium halides" patented technology

A lamp includes a discharge sustaining fill which includes cesium halide, one of indium halide and thallium halide, optionally gadolinium halide and a rare earth halide component selected from dysprosium halide, holmium halide, thulium halide, and neodymium halide. In operation without a jacket, the lamp may have a color temperature of from 7,000K to 14,000K and a color rendering index of at least 70 when operated at an arc wall loading in excess of about 2 W / mm2.

The invention relates to a preparation method of 4,4-dihalotetrahydropyran, comprising the steps of mixing halogenated homoallylic alcohol, aldehydes, indium trihalide and a solvent in a flask, mixingwell to obtain a mixed liquid controlled to be -20 to 0 DEG C, dropwise adding trimethyl halogenosilane slowly, starting reaction, allowing reacting by stirring at a certain temperature for 1-24 h, adding sodium bicarbonate saturated solution for quenching reaction, after the solution layers into an organic phase and an aqueous phase, extracting the aqueous phase with methyl tertiary butyl ether,combining the extract to the organic phase, washing the obtained organic phase with saturated salt water, drying, evaporating to remove an organic solvent to obtain a crude product, and subjecting the crude product by separation and purification by column chromatography to obtain a finished product that is applicable to the field of flame retardants and the field of pesticides. The preparation method has simple process and high yield of product, the product has high purity, indium trihalide of catalyst quantity is used in the reaction system, indium consumption is low, the catalyst cost is low, and the preparation method is economical and practical.

The present invention provides a discharge lamp capable of improving luminous efficiency, suppressing rise in tube voltage, prolonging life, and irradiating light of a desired color even if it is lit with low power. It includes: a light-emitting part having a discharge space filled with a discharge medium containing a metal halide and an inert gas, and substantially not containing mercury; and a pair of electrodes protruding into the discharge space and separating Arranged facing each other at a predetermined distance. The metal halides include scandium halides, sodium halides, indium halides, and zinc halides. When the weight of the scandium halide is Ms and the weight of the sodium halide is Mn, 0.8≦Mn / Ms≦1.3. The weight ratio of the indium halide to the metal halide is 0.3 wt% or more and 2.0 wt% or less.

The invention discloses a method for preparing tetrahedral light-emitting indium phosphide / zinc sulfide core-casing quantum dots. The method comprises the following steps: preparing high-boiling point tris(dialiphatic amido) phosphine, preparing InP quantum dot cores, preparing InP / ZnS core-casing quantum dots and separating the InP / ZnS core-casing quantum dots. Through the use of the high-boiling point tris(dialiphatic amido) phosphine as a phosphorus source, the price is low, the chemical structure is stable, the reaction is mild and safe, and gas is not produced. All reaction precursors are common chemical reagents and low in toxin and safe to store and use. The luminescent color of the InP / ZnS core-casing quantum dots can be precisely controlled simultaneously by the reaction temperature, the ratio of indium halide to the tris(dialiphatic amido) phosphine, the type of the halide and the reaction time, and high fluorescence quantum yield can be ensured.