The addition of a small amount of nano-powder can reduce the firing temperature of TZP from 1540! to 1460!: This also prevents the abnormal growth of Zr2 grains in the TZP ceramic body and improves the strength and toughness of TZP ceramics; ( ) Because the nano powder has very fine grains and many grain boundaries, it is combined with the matrix and dispersed uniformly in the grain boundaries and crystals of the basic Zr2, which greatly changes the defects of the TZP microstructure and significantly improves the strength and hardness. 　　2. The phase transformation temperature decreases.

Zhuzhou 412007) 80! PP Injection Syringe Mould flexural strength is increased by 30. This is due to: ( U3Y-TZP nano-powder particles are very small, much smaller than the critical particle size of the Martensitic transformation, which strengthens the phase transformation of TZP ceramics; (FZP nano-powder has a huge surface area, resulting in a large reduction in sintering driving force The firing temperature of TZP ceramics. Then the two parts are bonded to obtain High-quality mold that is both wear-resistant, impact-resistant, and reasonable in price. Then drying in the oven for standby. The results are shown in Table 1 and Figure 1. 　

　4.2 Preparation of 3YTZP micropowder produced by Shenxun CSG with an average particle size of 0.3mm, as can be seen from P1, the size of r2 crystal diameter is very small, and the martensite transformation occurs near its critical size, resulting in phase toughness. 3Y TZP micropowder and 3YTZP Nano powder, using alcohol as the dispersing medium, using 3YTZP ball stone as the ball milling medium in the planetary mill, fast ball milling for 1 hour.

In order to save costs and improve its price-performance ratio, according to the working characteristics and stress state of the die, the working surface of the die is made of 3YTZP ceramic instead of the working surface part made of steel.1~0.. 8H'0 for preparation of 3Y-TZP nanopowder , Y (N3) 3, ammonia water, made by chemical co-precipitation method, the average particle size is 20> m. 4 Analysis and discussion 4. The water absorption rate is measured with the boiling method. 　　

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