RU2013128751A

RU2013128751A - METHOD FOR PRODUCING CERAMIC COMPOSITE MATERIAL BASED ON ALUMINUM AND ZIRCONIUM OXIDES

Info

Publication number: RU2013128751A
Application number: RU2013128751/03A
Authority: RU
Inventors: Ольга Юрьевна Задорожная; Ольга Васильевна Тиунова; Юрий Кондратьевич Непочатов; Олег Викторович Медведко
Original assignee: Закрытое акционерное общество "НЭВЗ-КЕРАМИКС"
Priority date: 2013-06-24
Filing date: 2013-06-24
Publication date: 2014-12-27
Also published as: RU2549945C2

Abstract

1. Способ получения керамического композитного материала на основе оксидов алюминия и циркония, заключающийся в подготовке диоксида циркония и его стабилизатора, которая включает в себя стабилизацию в тетрагональной фазе диоксида циркония механическим способом, при этом в качестве стабилизатора используют соединения редкоземельных элементов, мокром измельчении и смешивании всех компонентов с добавлением органического связующего, приготовлении пресс-порошка, формовании изделий и их обжиге, отличающийся тем, что стабилизацию диоксида циркония в тетрагональной фазе выполняют следующим образом, смешивают в активаторе соль циркония и стабилизатор, в качестве которого используют соль редкоземельного элемента, причем для определения количества стабилизатора соли циркония и редкоземельного элемента пересчитывают на соответствующие оксиды, при этом содержание оксида редкоземельного элемента составляет 3-10 мол. % от содержания диоксида циркония, затем полученную смесь термообрабатывают при температуре 500-600°C в течение 1-3 часов до получения стабилизированного в тетрагональной фазе диоксида циркония, далее в активаторе по отдельности измельчают полученный стабилизированный диоксид циркония и оксид алюминия с добавкой карбоната магния, а затем их смешивают, кроме того, формование изделий производят методом осевого прессования, а обжиг проводят при температуре 1550-1600°C в течение 1-3 часов.2. Способ по п.1, отличающийся тем, что измельчение и смешивание всех компонентов выполняют в высокоскоростном активаторе при ускорении мелющих тел не менее 10 g.3. Способ по п.1, отличающийся тем, что мокрое измельчение смеси ок1. A method of producing a ceramic composite material based on aluminum and zirconium oxides, which consists in preparing zirconia and its stabilizer, which includes stabilization in the tetragonal phase of zirconia by mechanical means, while rare earth compounds are used as stabilizer, wet grinding and mixing all components with the addition of an organic binder, preparation of a press powder, molding of products and their firing, characterized in that the stabilization of dioxide The zirconium in the tetragonal phase is carried out as follows, the zirconium salt and stabilizer are mixed in the activator, the rare-earth element salt is used as the stabilizer, and the zirconium salt and rare-earth element are converted to the amount of stabilizer to be converted to the corresponding oxides, while the content of rare-earth oxide is 3-10 mol . % of the content of zirconium dioxide, then the resulting mixture is heat treated at a temperature of 500-600 ° C for 1-3 hours to obtain stabilized zirconia in the tetragonal phase, then the obtained stabilized zirconium dioxide and alumina with magnesium carbonate are separately milled, and then they are mixed, in addition, the products are molded by axial pressing, and firing is carried out at a temperature of 1550-1600 ° C for 1-3 hours. 2. The method according to claim 1, characterized in that the grinding and mixing of all components is performed in a high-speed activator with acceleration of grinding media of at least 10 g. 3. The method according to claim 1, characterized in that the wet grinding of the mixture is ok

Claims

1. A method of producing a ceramic composite material based on aluminum and zirconium oxides, which consists in preparing zirconia and its stabilizer, which includes stabilization in the tetragonal phase of zirconia by mechanical means, while rare earth compounds are used as stabilizer, wet grinding and mixing all components with the addition of an organic binder, preparation of a press powder, molding of products and their firing, characterized in that the stabilization of dioxide The zirconium in the tetragonal phase is carried out as follows, the zirconium salt and stabilizer are mixed in the activator, the rare-earth element salt is used as the stabilizer, and the zirconium salt and rare-earth element are converted to the amount of stabilizer to be converted to the corresponding oxides, while the content of rare-earth oxide is 3-10 mol . % of the content of zirconium dioxide, then the resulting mixture is heat treated at a temperature of 500-600 ° C for 1-3 hours to obtain stabilized zirconia in the tetragonal phase, then the obtained stabilized zirconium dioxide and alumina with magnesium carbonate are separately milled, and then they are mixed, in addition, the products are molded by axial pressing, and firing is carried out at a temperature of 1550-1600 ° C for 1-3 hours.

2. The method according to claim 1, characterized in that the grinding and mixing of all components is performed in a high-speed activator with an acceleration of grinding media of at least 10 g.

3. The method according to claim 1, characterized in that the wet grinding of a mixture of aluminum oxide and magnesium carbonate is carried out to a particle size of less than 100 nm.

4. The method according to claim 2, characterized in that the wet grinding of a mixture of aluminum oxide and magnesium carbonate is carried out to a particle size of less than 100 nm.

5. The method according to claim 3, characterized in that stabilized zirconia is introduced into the crushed mixture, co-crushed for at least 5 minutes, a binder is added, and when preparing the granulate, the mixture is dried in air for at least 12 hours at a temperature of at least 120 ° C.

6. The method according to claim 4, characterized in that stabilized zirconia is introduced into the crushed mixture, crushed for at least 5 minutes, a binder is added, and when preparing the granulate, the mixture is dried in air for at least 12 hours at a temperature of at least 120 ° C.

7. The method according to any one of claims 1 to 6, characterized in that the axial pressing is carried out at a pressure of 190-300 MPa.

8. The method according to any one of claims 1 to 6, characterized in that the mixture after grinding is sieved through a 150-250 mesh sieve.