3 results about "Calcium fluorophosphate" patented technology

The application relates to the technical field of sensors, and particularly discloses a magnesium-based metal ceramic sensitive element for a breathing pump and a preparation method thereof. The sensitive element is prepared by sintering a magnesium-based metal ceramic composition, and the raw materials include a magnesium-zinc-calcium medical magnesium alloy matrix phase, a dual-phase ceramic functional phase compounded by fluorophosphate calcium and magnesium boride, a low-temperature sintering fluxing compatible phase compounded by lithium fluoride and calcium fluoride, a potassium fluozirconate interface bridging modification component and a high-purity indium conductive stabilization component. The sensitive element is prepared through inert atmosphere raw material mixing, drying, powder pre-activation, cold isostatic pressing, double sealing and protection, stepwise low-temperature pulse discharge sintering, forming processing, surface passivation and working condition pre-stabilization treatment. The sensitive element is suitable for medical breathing pump sensing, has good conductivity, creep resistance and biocompatibility, and is suitable for high-frequency alternating working conditions; the preparation method is controllable, can realize low-temperature densification sintering, and guarantees the stability of the element structure and performance.

The application belongs to the field of industrial wastewater, and particularly relates to a double-layer filler calcium fluorophosphate crystallization deep fluorine removal system and a method thereof. The mixing distribution area of the fluidized bed system is provided with a water inlet pipe, the water inlet pipe is respectively provided with a first dosing pipe and a second dosing pipe, and the dosing pipes are connected with the water inlet pipe through a pipeline mixer. The first dosing pipe adds phosphates and inorganic acid, and the second dosing pipe adds calcium salt. Industrial fluorine-containing wastewater enters the mixing distribution area, the reagent in the first dosing pipe makes the pH value of the wastewater acidic, avoiding pipeline blockage; then the wastewater enters the pH adjusting area and contacts with the first layer of filler, the pH value of the wastewater changes to neutral to alkaline; then the wastewater enters the induced crystallization area, the fluorine ions in the wastewater generate calcium fluorophosphate crystals with the phosphates and the calcium salt on the surface of the filler, realizing efficient fluorine removal. Through the principle of acidic pH in the mixing distribution area and neutral to alkaline pH in the induced crystallization area, the application guarantees smooth water inlet and deep fluorine removal of the wastewater.

The present invention relates to improved phosphopeptide stabilised amorphous calcium phosphate and / or amorphous calcium fluoride phosphate complexes and compositions containing those complexes. Methods of making the complexes of the invention and of treating or preventing oral conditions are also provided. In one aspect, the present invention provides a composition comprising equal to or greater than about 8% w / v stannous associated phosphopeptide (PP) stabilized amorphous calcium phosphate (ACP) or amorphous calcium fluoride phosphate (ACFP) complexes wherein the complexes have a stannous ion content of equal to, or greater than, 1 mole of stannous per mole of PP but less than 4 moles of stannous per mole of PP.