Ceramic bullet-proof sheet and preparation method thereof

Abstract

The invention discloses a ceramic bullet-proof sheet and a preparation method thereof. The ceramic bullet-proof sheet is prepared from the following raw materials in percentage by mass: 94 to 96 percent of silicon carbide, 2.8 to 3.2 percent of maltodextrin and 1.8 to 2.2 percent of boron carbide. The ceramic bullet-proof sheet is prepared by the steps of weighing the raw materials according to the proportion, adding process water and completely mixing to obtain slurry, feeding the slurry into a pelletizing tower, performing spray pelletization to form granules, performing coarse and fine granule separation by a circular vibration sieve, putting the granules into a debugger, debugging the water content, pressing the granules by a press to form a bullet-proof sheet blank with the required specification, performing turning processing, putting into a non-pressure sintering furnace to sinter, grinding the plane and the vertical plane of the ceramic piece by grinding and milling equipment after sintering formation, and polishing to obtain the ceramic bullet-proof sheet with the required size and precision. The product provided by the invention is simple in burdening, adopts only two auxiliary materials, and is small in use amount and low in raw material cost; the production process has high controllability, parameters can be adjusted at any time, the product granularity and shape are distributed uniformly, the product has high hardness, small specific gravity and high ballistic performance, energy consumption in the production process is low, and the finished product ratio is high.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a ceramic bulletproof sheet and a preparation method thereof. Background technique [0002] In the field of national defense, bulletproof ceramic materials mainly include boron carbide (B4C), silicon carbide (SiC) and alumina (Al 2 o 3 ) three kinds, of which B 4 C has the lightest weight, high specific modulus, and good ballistic performance. It is the bulletproof ceramic material with the best comprehensive performance. However, because the pressureless sintering preparation process has not been solved for a long time, they are all prepared by hot pressing sintering method at present, and the cost and price are very expensive. In contrast, SiC ceramic materials can be sintered without pressure, and the cost is greatly reduced. At present, SiC bulletproof ceramics are only limitedly used in the high-end protection market, such as the protection syste...

AI Technical Summary

Problems solved by technology

[0004] At present, the ballistic sheet produced by the existing technology, due to the addition of many auxiliary materials, the shrinkage system of each auxiliary material is different, easily produces pores, resulting in uneven structure of the blank, poor compactness of the product, and low yield

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