Study On Technology And Performance Of Microwave Sintered Ceramic Ring

As a key device in the textile work,the steel ring is traditionally made of steel rings that are not resistant to wear and tear and have a huge annual loss.The development of ceramic rings that are more resistant to wear and high temperatures is of great significance for ring spinning.The cost of the ceramic ring depends on the cost of its preparation process,the key step of the preparation process is the sintering process.The conventional sintering method of ceramics consumes time and energy,the temperature distribution is uneven and the performance of the sample after sintering is low,while the microwave sintering method not only takes a short time,is energy-saving and efficient,but also has better performance after sintering.A key factor that affects the performance of microwave sintered samples is whether the material is heated uniformly in the sintering cavity.This is closely related to the distribution of the electromagnetic field in the sintering cavity.Therefore,it is very important to master the distribution of the electromagnetic field in the cavity during sintering.In order to solve the problem of uneven absorption of microwaves in the microwave sintering cavity at low temperatures,this article uses the three-dimensional electromagnetic simulation technology High Frequency Structure Simulator(HFSS),under the guidance of its simulation results,to study the technology and performance of microwave sintering technology to prepare ceramic rings.First,the simulation software HFSS is used to simulate the magnetic field distribution in the microwave sintering chamber,and by changing the sample position and comparing the electromagnetic field distribution,the most uniform area of the sample field distribution is obtained,and the simulation results are used to guide the microwave sintering experiment.Then,3 mol% yttria stabilized tetragonal zirconia polycrystalline(3Y-TZP)ceramic ring bodies were obtained by the injection coagulation forming method.The presintering methods,conventional sintering and microwave sintering,were used to investigate the influence of the presintering on the properties of the ceramic rings.The best technology for microwave sintering of ceramic rings was determined.Finally,change the position of the sample in the sintering cavity to conduct sintering experiments to verify the accuracy of the simulation results.The experimental results show that the samples of microwave presintering have smaller grain size and more uniform distribution,and their properties such as density,vickers hardness and fracture toughness are better than those of conventional presintering,and the final sintering temperature is 100? lower.In addition,the ceramic samples sintered in the region with the most uniform electromagnetic field distribution obtained by the simulation software have better performance than the samples sintered in other regions,and have a more uniform particle size and fewer pores.Therefore,the simulation technology guides the microwave heating process,which can effectively solve the problem of uneven microwave heating and improve sample performance.The accuracy of 3D electromagnetic field simulation analysis and the guidance of the superiority of 3Y-TZP ceramic microwave sintering have been verified.The use of microwave sintering technology under the guidance of electromagnetic simulation technology can improve the performance and yield of pure ceramic steel rings,improve efficiency,and reduce process costs.Making it possible for pure ceramic steel rings to be widely used in ring spinning production.