Anti-radiation ceramics and preparation method thereof

Abstract

The present invention relates to an anti-radiation ceramics and a preparation method thereof. The ceramics is characterized in that the ceramics is composed of the following firing raw materials by weight percentage: 20-45 percent ferrite, 20-30 percent zinc oxide, 5-10 percent metal powder, 5-10 percent silicon oxide, 5-10 percent aluminium oxide, 5-10 percent kaolin, 5-10 percent calcium oxide, 1-5 percent rare earth, 1-5 percent tourmaline and 1-2 percent cellulose, the sum of the various components is 100 percent; the ferrite is strontium iron oxide, barium iron oxide or cobalt iron oxide; the metal powder is copper powder, iron powder or nickel powder; the kaolin is calcined kaolin; the rare earth is at least one of lanthanum nitrate, neodymium nitrate, praseodymium nitrate, europium nitrate and erbium nitrate; and the tourmaline is at least one of iron tourmaline, lithium tourmaline and magnesium tourmaline. The preparation method of the ceramics comprises: 1) material preparation: selecting and preparing materials according to the raw materials of the invention; 2) ball milling and material mixing; 3) granulation; 4) shaping; 5) drying; and 6) firing.

Description

technical field [0001] The invention relates to functional ceramic technology, in particular to a ceramic with radiation protection function and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the rapid development of the information industry, equipment or systems such as computers, mobile phones, fax machines, telephones, and networks have been widely used in the processing of information generation, transmission, reception, and storage. This type of equipment is inseparable from the action of electromagnetic waves when working. The wide application of electromagnetic waves has brought increasingly serious electromagnetic interference and pollution. One of the effective ways to reduce electromagnetic interference is to use microwave absorbing (receiving) materials. When the electromagnetic wave passes through the wave-absorbing material, electromagnetic wave loss will occur, so that the energy of the electroma...

AI Technical Summary

Problems solved by technology

The common defect of these methods is: the mixing problem of ferrite and substrate, or the problem of mixing uniformity of ferrite and substrate cannot be solved, thus affecting the electromagnetic properties of ferrite

Chinese patent CN 1644546A reports a "composite wave-absorbing material and its preparation process". It adopts the citrate sol-gel method to prepare a barium ferrite layer on the surface of porous glass phase particles, so that it can generate electromagnetic waves. Certain absorption, but there is a certain difficulty in forming and processing wave absorbing agent; Chinese patent CN1807537A discloses a "preparation method of dielectric / magnetic composite wave absorbing powder", which adopts in-situ deposition method to prepare composite The production process of microwave-absorbing materials is complex, time-consuming and labor-intensive, which greatly limits the mass production of materials; Chinese patent CN 1905079A introduces an "electromagnetic compatible anechoic composite wave-absorbing material and its manufacturing method", which refers to the Adding a transition matching section between the ammonia vinegar absorbing material and the ferrite material can have good absorbing performance at high frequencies, but the thickness of the transition matching section is 50mm±2mm, and the matching performance becomes a problem