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Boron nitride based ceramic material as well as preparation method and application thereof

A boron nitride-based, ceramic material technology, applied in the field of ceramic materials, can solve the problems of reduced service performance and high sintering temperature of side seal materials, and achieve excellent comprehensive service performance, low sintering temperature, and lower sintering temperature.

Active Publication Date: 2018-01-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problem that the service performance of the side seal material is reduced due to the high sintering temperature of the boron nitride-based multiphase ceramic side seal material and the low melting point sintering aid, and to provide a boron nitride base material for thin strip continuous casting. Ceramic side sealing plate material and preparation method thereof

Method used

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specific Embodiment approach 1

[0021] Specific Embodiment 1: In this embodiment, the boron nitride-based ceramic side seal material for strip continuous casting is composed of 55 to 85 parts by weight of boron nitride, 15 to 35 parts of fused zirconia, and 5 parts by weight. ~15 parts of silicon carbide and 5~10 parts of additive, the additive is borate or borate hydrate.

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that the borate is one or a combination of sodium borate, calcium borate, magnesium borate, magnesium calcium borate and sodium calcium borate. Others are the same as in the first embodiment.

[0023] When the borate described in this embodiment is a composition, the ratio between each component is arbitrary.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the borate hydrate is sodium tetraborate decahydrate, calcium tetraborate decahydrate, calcium magnesium borate decahydrate and calcium sodium borate decahydrate one or a combination of more than one. Others are the same as those in the first or second embodiment.

[0025] When the borate hydrate described in this embodiment is a composition, the ratio between each component is arbitrary.

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Abstract

The invention relates to a boron nitride based ceramic material as well as a preparation method and application thereof. The boron nitride based ceramic material is prepared from boron nitride, electric-melting zirconium oxide, silicon carbide and an additive. The method comprises the following steps: 1, weighing raw materials; 2, preparing composite powder; 3, preparing boron nitride composite powder; 4, preparing a boron nitride based ceramic material prefabricated blank; 5, preparing the boron nitride based ceramic material. The invention further relates to the application of the boron nitride based ceramic material serving as a boron nitride based ceramic side sealing plate material for thin strip continuous casting. By adopting the boron nitride based ceramic material provided by theinvention, the technical problem that a boron nitride based complex phase ceramic material has high sintering temperature and a sintering auxiliary agent has a low melting point so that the service performance is reduced is solved; the density of the prepared boron nitride based ceramic material can reach 97 percent or more; the boron nitride based ceramic material has excellent integrated mechanical properties and the bending strength value can reach 420MPa, so that the boron nitride based ceramic material is very suitable for being used as the boron nitride based ceramic side sealing plate material for the thin strip continuous casting.

Description

[0001] This application is a divisional case where the applicant is Harbin Institute of Technology, the application number is 201510689600.8, the application date is October 21, 2015, and the invention name is "boron nitride-based ceramic side sealing plate material for thin strip continuous casting and its preparation method" Application. technical field [0002] The invention belongs to the field of ceramic materials, and relates to a boron nitride-based ceramic material and a preparation method and application thereof. Background technique [0003] Twin-roll thin strip continuous casting technology is a new type of thin strip steel production process. As a cutting-edge technology in the development direction of the iron and steel industry, it can be directly produced from liquid steel with a thickness of 1 to The 5mm thin strip blank can complete the whole process from liquid metal to solid thin strip in a short time. In addition, it has unique advantages in obtaining sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/583C04B35/622
Inventor 陈磊王玉金贾德昌周玉
Owner HARBIN INST OF TECH
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