阅读说明：本技术 一种微波陶瓷结合剂的制备方法 (Preparation method of microwave ceramic bonding agent ) 是由 郑师光 吕升东 刘宏伟 毕志宇 于 2019-08-19 设计创作，主要内容包括：本发明公开一种微波陶瓷结合剂的制备方法,按重量百分比含量为：二氧化硅58-64％,氧化铝18-21％,硼酸8-12％,碳酸钠5-15％,碳酸锂4-6％；制备工艺为：陶瓷原料-配料-预熔-水淬-湿磨-干燥过筛-成型-微波烧结；本发明优点：1)本发明能源利用率高,在空气常压气氛下进行低温烧结,而且烧结时间短,一般在20分钟以内。2)烧结后试块致密化程度高且均匀,没有出现黑心、发泡等现象。3)制备的结合剂具有较高的抗折强度。(The invention discloses a preparation method of a microwave ceramic bonding agent, which comprises the following components in percentage by weight: 58-64% of silicon dioxide, 18-21% of aluminum oxide, 8-12% of boric acid, 5-15% of sodium carbonate and 4-6% of lithium carbonate; the preparation process comprises the following steps: ceramic raw material-batching-premelting-water quenching-wet grinding-drying and sieving-molding-microwave sintering; the invention has the advantages that: 1) the invention has high energy utilization rate, low-temperature sintering in air atmosphere at normal pressure and short sintering time, and the sintering time is generally within 20 minutes. 2) The sintered test block has high and uniform densification degree and does not have the phenomena of black core, foaming and the like. 3) The prepared binding agent has higher flexural strength.)

1. A preparation method of a microwave ceramic bonding agent is characterized by comprising the following steps: the contents by weight percentage are as follows: 58-64% of silicon dioxide, 18-21% of aluminum oxide, 8-12% of boric acid, 5-15% of sodium carbonate and 4-6% of lithium carbonate;

the preparation process comprises the following steps:

(1) mixing and grinding a ceramic bonding agent to 400 meshes, pouring the mixture into a crucible furnace for high-temperature melting at 1500 ℃, and performing water quenching, wet grinding and drying on the molten glass to prepare ceramic bonding agent powder;

(2) sieving the ceramic bonding agent powder prepared in the step (1) by a 500-mesh sieve, and pressing into a green body with a required shape;

(3) performing microwave sintering on the green body obtained in the step (2); the microwave ceramic bonding agent is prepared.

2. The method for preparing a microwave ceramic binder according to claim 1, wherein: the microwave sintering in the step (3) refers to: under the atmosphere of air and normal pressure, heating from room temperature to 550 ℃ at the heating rate of 15-16 ℃ per minute, and then heating from 550 ℃ to 720-850 ℃ at the heating rate of 10-12 ℃ per minute; sintering for 15 minutes at the sintering temperature of 720-850 ℃.

Technical Field

The invention belongs to the field of a manufacturing method of a grinding wheel bonding agent, and particularly relates to a preparation method of a microwave ceramic bonding agent.

Background

As a novel heating technology, the microwave heating has the advantages of integral uniform heating, short heating time and the like, and is effectively applied to the fields of medicine, chemical industry, food heating and the like. The microwave sintering has the excellent characteristics of obviously reducing the sintering temperature of the ceramic material, improving the performance of the composite ceramic and the like, and the adoption of the microwave sintering of the composite ceramic becomes an application research hotspot.

The key technology of microwave sintering ceramic equipment is microwave heating, and the principle of the microwave sintering ceramic equipment is that substances are subjected to interface polarization, dipole steering polarization, electronic polarization, atomic polarization and other modes under the action of microwaves, so that electromagnetic energy of the microwaves is converted into heat energy, and the raw materials are integrally heated to a sintering temperature in a microwave field to realize a sintering process.

At present, the research on ceramic binders is that the product is optimized on the basis of raw material composition, and the high-strength ceramic binders sintered at low temperature are tried to be realized by changing the composition of substances or introducing a certain new element, but a process adjustment method is rare. The invention adopts the process adjustment and uses the microwave sintering technology to realize the low-temperature sintering and densification of the product. The method has the advantages of saving energy loss in the sintering process, shortening sintering time, achieving uniform densification degree, being free of pollution and the like, and saves energy by 75 percent compared with the traditional process.

Disclosure of Invention

The invention aims to solve the technical problems of high sintering temperature, high energy consumption, long sintering time, uneven sintering density and the like in the heat treatment of the ceramic bond in the prior art, and provides a preparation method of the ceramic bond, which has the advantages of high energy utilization rate, low sintering temperature, short time and even density; the finally prepared ceramic bond has higher flexural strength.

The invention is realized by the following technical scheme:

a preparation method of a microwave ceramic bonding agent comprises the following steps:

58-64% of silicon dioxide, 18-21% of aluminum oxide, 8-12% of boric acid, 5-15% of sodium carbonate and 4-6% of lithium carbonate;

the preparation process comprises the following steps:

(1) mixing and grinding a ceramic bonding agent to 400 meshes, pouring the mixture into a crucible furnace for high-temperature melting at 1500 ℃, and performing water quenching, wet grinding and drying on the molten glass to prepare ceramic bonding agent powder;

(2) sieving the ceramic bonding agent powder prepared in the step (1) by a 500-mesh sieve, and pressing into a green body with a required shape;

(3) performing microwave sintering on the green body obtained in the step (2); the microwave ceramic bonding agent is prepared.

The microwave sintering in the step (3) refers to: under the atmosphere of air and normal pressure, heating from room temperature to 550 ℃ at the heating rate of 15-16 ℃ per minute, and then heating from 550 ℃ to 720-850 ℃ at the heating rate of 10-12 ℃ per minute; sintering for 15 minutes at the sintering temperature of 720-850 ℃.

The invention has the following advantages:

1) the invention has high energy utilization rate, low-temperature sintering in air atmosphere at normal pressure and short sintering time, and the sintering time is generally within 20 minutes.

2) The sintered test block has high and uniform densification degree and does not have the phenomena of black core, foaming and the like.

3) The prepared binding agent has higher flexural strength.

Detailed Description

The process flow of the invention is as follows:

ceramic raw material-batching-premelting-water quenching-wet grinding-drying and sieving-molding-microwave sintering;