2results about How to "Uniform oxidation" patented technology

This invention discloses a modular, controllable atmosphere high-temperature oxidation device for the recovery of substandard sponge zirconium, relating to the fields of nuclear fuel cycle and materials technology. The device includes: a furnace body system, comprising, from the outside to the inside, a steel outer shell, a refractory insulation layer, and a detachable furnace liner; multiple independently controlled heating zones arranged along the furnace body axis, each equipped with an independent heating element and thermocouple; an atmosphere control system including nitrogen and oxygen sources, an inert gas source, a mass flow controller, and a mixer; a sealing and cooling system employing a high-temperature sealing ring and a double-layer furnace shell design, with circulating cooling water flowing through the interlayer; and an automatic control system equipped with a temperature-atmosphere-time automated control program for fully automated operation and remote monitoring of the oxidation process. The device provided by this invention can achieve efficient and uniform oxidation treatment of irregular porous sponge zirconium within the range of 500-1000℃, transforming it into zirconium oxide with consistent physical properties.

The application discloses a preparation method of a sodium ion battery hard carbon negative electrode material based on oxygen-containing functional group micropore structure control, and comprises the following steps: S1, alkalization treatment: biomaterial raw materials are soaked in an alkaline solution for reaction, and then filtered, washed with water and dried to obtain a first precursor; S2, oxidation treatment: soaking in an oxidant solution, and then filtering and drying to obtain a second precursor; S3, preparation of an oxidized precursor: oxidation is carried out in an oxygen atmosphere to obtain the oxidized precursor; S4, low-temperature sintering of a pre-carbonization material: low-temperature sintering is carried out in a protective atmosphere to obtain the pre-carbonization material; S5, refinement treatment of the pre-carbonization material: the pre-carbonization material is crushed to obtain a refined pre-carbonization material; S6, purification of the pre-carbonization material: acid washing, centrifugation, water washing and drying are carried out to obtain an acid-washed and purified pre-carbonization material; and S7, high-temperature sintering: high-temperature sintering is carried out in a protective atmosphere to obtain the sodium ion battery hard carbon negative electrode material. The application has the characteristics of high capacity, high first efficiency and simple process.