Energy accumulation luminous stone and its production method

Abstract

The present invention provides an energy storage luminescent stone, consisting of 90-98% of long afterglow luminescent powder with the grain size of not less than 300 meshes and 2-10% of silicon dioxide by weight. The preparation method for the stone specifically includes the following steps: (1) the long afterglow luminescent powder with the grain size of not less than 300 meshes and SiO2 are evenly mixed, wherein, the weight percentage of the powder is 90-98%; the weight percentage of SiO2 is 2-10%; (2) the mixed materials are formed through isopressing without any adhesive; and (3) the formed green body is put in a crucible, placed in an electric furnace in a reducing atmosphere containing 5-8% of H2 and 92-95 percent of N2 for heat treatment, the conditions of the heat treatment include the uniform-speed temperature rise between 1300-1500 DEG C, 1-3 hours of heat preservation, and finally the stone is obtained. The invention has excellent luminescent property and similar contents, hardness, proportion and refraction index to those of natural jades, and looks bright, colorful and sparkling through cutting, burnishing, engraving and polishing, thus having high artistic value and collecting value.

Description

technical field [0001] The invention relates to an energy storage luminescent stone and a preparation method thereof, which is an inorganic non-metallic material and belongs to the field of new materials. It can be used in jewelry and handicraft industries, and has good ornamental and artistic value because of its unique self-illuminating characteristics. Background technique [0002] There are some natural luminous substances in nature. The "luminous pearl" spread among the people in our country has a strange luminous performance, which can emit crystal brilliance in a dark environment. Regarded as a treasure in the world. Energy storage luminescent materials, also known as long afterglow luminescent materials, can slowly glow in the dark after absorbing visible light, thus having the function of "night pearl". Therefore, this material is artificially synthesized into massive stones, and through cutting, grinding, polishing and other processes, the devices people want are...

AI Technical Summary

Problems solved by technology

As introduced in Chinese patent ZL200410029960.7, the use of micropowder produced in the preparation of luminescent powder has many impurities, which affect the luminous brightness and performance of the synthesized product. Adding an enhancer during synthesis not only increases the cost, but also affects the luminous brightness and luminous performance. Duration, placed in a hydrogen atmosphere furnace during sintering, the process is not safe

As introduced in Chinese patent ZL01120005.7, no pressure molding is used, which cannot guarantee the compactness of the fired product. The internal structure is loose and has holes, which makes the product unable to be cut, polished, polished, etc.

Images