Rare-earth oxide and manganese oxide co-stable zirconia ceramics and preparation thereof

Abstract

The invention discloses a zirconia ceramic stabilized by rare earth oxide and manganese oxide and a method for preparing the same. The zirconia ceramic consists of a certain mol percent of zirconia, the rare earth oxide and the manganese oxide, wherein the zirconia is a matrix, and the rare earth oxide and transition metal oxide of manganese oxide serve as a stabilizing agent together. The preparation process comprises the following steps: pouring the weighed and mixed powder of the zirconia, the manganese oxide and the rare earth oxide into a mortar; after fully mixing and grinding the mixed powder, pressing the mixed powder into blank tablets at a pressure of between 8 and 10 MPa; sintering the blank tablets in a high-temperature tubular furnace; and then cooling the blank tablets with the furnace. The invention adopts the transition metal oxide and the rare earth oxide as a stabilizing agent together to prepare the stabilized zirconia, has the characteristics of simple operation method, accuracy, high efficiency, easy control of reaction conditions, full reaction and the like, and the prepared square zirconia ceramic material stabilized by the manganese oxide has good stability and conductivity.

Description

technical field

[0001] The invention belongs to the technical field of materials, and relates to a single tetragonal zirconia ceramic material and a preparation method thereof, in particular to a zirconia ceramic co-stabilized by rare earth oxides and manganese oxide and a preparation method thereof. Background technique

[0002] Zirconia (ZrO 2 ) is a very important class of structural and functional materials with high melting point and good chemical stability. Pure zirconia will undergo a monoclinic crystal system (m-ZrO 2 ), tetragonal system (t-ZrO 2 ) and cubic system (c-ZrO 2 ) transformation. Pure ZrO 2 During the sintering cooling process, the martensitic phase transformation from tetragonal phase to monoclinic phase will be accompanied by a volume change of 3% to 5%. This volume effect will cause material cracking, which limits the engineering application of zirconia materials.

[0003] In order to eliminate the volume effect caused by the phase transition, r...