Ceramic slice and preparation method thereof

A ceramic sheet and formula technology, applied in the field of ceramics, can solve the problems of easy breakage, short life, easy loss, etc., and achieve the effect of not easy to break, long life and small loss

Inactive Publication Date: 2014-12-17
JIN GANG NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although currently commonly used methods (such as isostatic pressing) can prepare ZrO with higher strength and toughness 2 Products, and have been applied in many fields, but in some more demanding fields such as thin sheets, ultra-thin products, etc., it still cannot mee...

Method used

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  • Ceramic slice and preparation method thereof
  • Ceramic slice and preparation method thereof

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preparation example Construction

[0058] Such as figure 1 As shown, the invention provides a kind of preparation method of ceramic sheet, comprising:

[0059] S101, pre-pressing the pretreated powder to obtain a semi-finished product.

[0060] During the pre-press molding process of the pretreated powder, the pre-press molding pressure is 20-200T.

[0061] Preferably, the pressure of the pre-press forming is 38~60T.

[0062] More preferably, the pre-pressing pressure is 40T, 45T, 50T or 55T.

[0063] S102. Perform low-temperature heat treatment on the pre-pressed semi-finished product, wherein the temperature of the low-temperature heat treatment is 500-1100° C.

[0064] Preferably, the temperature of the low temperature heat treatment is 500°C to 1000°C.

[0065] S103, performing hot-press vibration sintering on the semi-finished product that has undergone low-temperature heat treatment, wherein the sintering temperature of the hot-press vibration is 1300-1700° C., and the pressure is 4-50 MPa.

[0066] ...

Embodiment 1

[0110] Mix 94% zirconia, 5% yttrium oxide, and 1% lanthanum oxide, add an adhesive polyvinyl alcohol aqueous solution for mixing and granulation; carry out dry pressing molding by a press, and the dry pressing pressure is 40T to obtain a semi-finished product; carry out at 800°C Low temperature heat treatment; then vibratory hot pressing sintering, the sintering temperature is 1470°C, and the pressure is 30MPa; finally, the vibratory hot pressing product is polished to obtain a zirconia ceramic sheet with a finished thickness of 0.3mm.

Embodiment 2

[0112] Mix 92% zirconia, 6% yttrium oxide, 1% cerium oxide and 1% praseodymium oxide, add an adhesive polyvinyl alcohol aqueous solution for mixing and granulation; perform dry pressing on a press with a dry pressing pressure of 45T to obtain a semi-finished product; Low temperature heat treatment at 600°C; then vibration hot pressing sintering, the sintering temperature is 1570°C, the pressure is 40MPa; finally, the vibration hot pressing product is polished to obtain a finished zirconia ceramic sheet with a thickness of 0.2mm.

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Abstract

The invention discloses a ceramic slice and a preparation method thereof. The ceramic slice is mainly made of zirconia and rare earth oxides, is prepared through a hot-press vibration sintering technology, and has a thickness of 0.01 to 0.6 mm. Correspondingly, the invention also discloses a preparation method of the ceramic slice. The preparation method comprises the following steps: carrying out pre-pressing and forming on powder, which has been subjected to a pretreatment, so as to obtain a half-finished product; subjecting the half-finished product to a low temperature thermal treatment; subjecting the half-finished product to hot-press vibration sintering; and finally polishing and burnishing the half-finished product so as to obtain the ceramic slice with a thickness of 0.01 to 0.6 mm. The strength of the provided ceramic slice can reach 1400 MPa or more, the toughness can reach 10 MPa.m<1/2>, and the performance parameters of the ceramic slice are prominently higher than that of common ZrO2 products. The ceramic slice can satisfy the requirements on slice and ultrathin slice with a thickness of 0.01 to 0.6 mm and has the advantages of difficultness in breakage, little loss, long service life, and durability.

Description

technical field [0001] The invention relates to the field of ceramics, in particular to a ceramic sheet and a preparation method thereof. Background technique [0002] Wear-resistant structural ceramics are widely used in industrial and civil fields, such as wear-resistant seals, wear-resistant shafts, wear-resistant balls, wear-resistant sheets and other structural products. The main material is alumina Al 2 o 3 , Zirconia ZrO 2 etc., where Al 2 o 3 Structural parts made of materials have been widely used due to their low price, easy availability of raw materials, and simple process. However, due to its strength (200~300MPa) and toughness (2~3MPa?m 1 / 2 ) are not high enough, and can only be applied as medium and low-grade materials. [0003] Under the environmental conditions that require high strength and toughness, it is necessary to choose ZrO 2 Material, and often use isostatic pressing and then sintering to prepare products. With the currently commonly used Zr...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
Inventor 周耀冯斌李小燕周梅
Owner JIN GANG NEW MATERIALS
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