3 results about "Strontium acetate" patented technology

This invention discloses a method for preparing a strontium titanate modified layer on the surface of zirconia based on an impregnation-heat treatment method, comprising: (1) mixing titanium sulfate, urea and water to obtain a precursor liquid A, placing zirconia ceramic in the precursor liquid A, heating to boiling and maintaining for a period of time, then removing the zirconia ceramic, and after heat treatment A, preparing a titanium dioxide film on the surface of zirconia; (2) mixing H2O2 aqueous solution, ammonia and deionized water, adding metatitanic acid and stirring to dissolve, obtaining a precursor liquid B, placing the zirconia with the titanium dioxide film in the precursor liquid B, and allowing it to stand and react for a period of time at room temperature, depositing zirconia modified with a titanium dioxide precursor layer; (3) dissolving strontium acetate, or a mixed salt composed of calcium acetate and / or magnesium acetate and strontium acetate in deionized water to obtain an impregnation treatment solution, placing the zirconia modified with the titanium dioxide precursor layer in the impregnation treatment solution, allowing it to stand and react for a period of time, and then removing it, and after heat treatment B, preparing a strontium titanate modified layer on the surface of zirconia. The strontium titanate layer prepared on the surface of zirconia ceramic in this invention is tightly attached to the zirconia substrate and has high hydrophilicity, which is conducive to the adhesion of proteins and cells in the human body. At the same time, it can release active factors such as strontium ions for a long time to promote bone formation and bone regeneration at the implantation site, ultimately enhancing the osseointegration capacity of the zirconia implant.

The invention relates to the field of refractory materials, in particular to a La2O3-containing refractory material and a preparation method thereof. The problems that an existing refractory material is low in compression strength and breaking strength, poor in thermal shock resistance and high in apparent porosity are solved. The refractory material is prepared by taking calcium oxide, silicon dioxide, magnesium oxide, aluminum oxide, ferric oxide and lanthanum oxide as base materials and adding strontium cobalt aluminate to coat cerium magnesium aluminum chromium powder, and potassium chloride and sodium chloride are used as molten salts to prepare the cerium magnesium aluminum chromium powder through a dissolution-reprecipitation mechanism. Citric acid monohydrate, strontium acetate, cobalt nitrate hexahydrate and aluminum nitrate form a stable complex, strontium cobalt aluminate is obtained through high-temperature treatment, cerium-magnesium-aluminum-chromium powder is coated with the strontium cobalt aluminate through a first solution, the volume density, thermal shock resistance and mechanical strength of the refractory material are improved, and the strict requirements of high-temperature industry for the high-performance refractory material are met.

This invention relates to a transparent strontium fluoride ceramic based on low-temperature sintering, its preparation method, and its applications. The transparent strontium fluoride ceramic, by mass percentage, consists of 95-99% strontium fluoride matrix and 1%-5% thermosensitive luminescent material. The method of this invention uses a mild strontium acetate solution as a sintering aid, and successfully prepares a transparent strontium fluoride ceramic with a density greater than 99% and high optical transmittance under a low temperature of 100-150 °C and a uniaxial pressure of 300-400 MPa. The low-temperature sintering process of this invention avoids damage to the material from strong acids and alkalis, allows the thermosensitive luminescent material to be incorporated into the ceramic matrix during sintering, effectively preserving the excellent properties of the luminescent material and exhibiting excellent optical performance and encapsulation protection.