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Preparation method and ball mill for microwave dielectric ceramic test piece

A technology of microwave dielectric ceramics and test pieces, which is applied in the field of ball mills, can solve problems such as inconvenience and insufficient grinding of materials, and achieve the effects of convenient use, convenient operation and reduced wear and tear.

Active Publication Date: 2014-09-03
JIAXING VOCATIONAL TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, this kind of automatic ball mill drives the drum to rotate through the motor to carry out mass production and processing. It is very inconvenient to carry out small batch production and processing.

Method used

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  • Preparation method and ball mill for microwave dielectric ceramic test piece
  • Preparation method and ball mill for microwave dielectric ceramic test piece
  • Preparation method and ball mill for microwave dielectric ceramic test piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The preparation method of this microwave dielectric ceramic test piece comprises the following steps:

[0055] A. Ball milling mixture: select MgO and Nb according to the weight ratio of 1:1:0.5 2 o 5 and alcohol, put it into an ordinary ball mill jar, then put zirconium balls into the ball mill jar as a milling medium, and then put the ball mill jar into a rolling ball mill for ball milling to obtain a slurry;

[0056] B. Screening and drying: use a 200-mesh screen to screen the above slurry.

[0057] Then, put the sieved slurry into a container at 70°C for 2 hours and dry it, then put it into a common industrial pre-fired furnace at 1000°C for 5 minutes, and cool naturally to obtain MgNb 2 o 6 Powder (MgNb 2 o 6 It is white with a little yellowish powder). In this embodiment, the ball mill was ball milled at a speed of 350 r / min for 20 hours.

[0058] C, making material: the concentration is 3% polyvinyl alcohol solution and MgNb 2 o 6 After the powder is mix...

Embodiment 2

[0076] The preparation method of this microwave dielectric ceramic test piece comprises the following steps:

[0077] A. Ball mill mixture: select MgO and Nb according to the weight ratio of 1:1:0.7 2 o 5 and alcohol, put it into an ordinary ball mill jar, then put zirconium balls into the ball mill jar as a milling medium, and then put the ball mill jar into a rolling ball mill for ball milling to obtain a slurry;

[0078] B. Screening and drying: use a 250-mesh screen to screen the above slurry.

[0079] Then, put the sieved slurry into a container at 80°C for 3 hours and dry it, then put it into a common industrial pre-fired furnace at 1300°C for 6 minutes, and cool naturally to obtain MgNb 2 o 6 Powder (MgNb 2 o 6 It is white with a little yellowish powder). In this embodiment, the ball mill was ball milled at a speed of 400 r / min for 25 hours.

[0080] C. Material: mix polyvinyl alcohol solution with a concentration of 3-6% and MgNb 2 o 6 After the powder is mixe...

Embodiment 3

[0086] The preparation method of this microwave dielectric ceramic test piece comprises the following steps:

[0087] A. Ball milling mixture: select MgO and Nb according to the weight ratio of 1:1:1 2 o 5 and alcohol, put it into an ordinary ball mill jar, then put zirconium balls into the ball mill jar as a milling medium, and then put the ball mill jar into a rolling ball mill for ball milling to obtain a slurry;

[0088] B. Screening and drying: use a 270-mesh screen to screen the above slurry.

[0089] Then, put the sieved slurry into a container at 90°C for 4 hours and dry it, then put it into a general industrial pre-fired furnace at 1400°C for 10 minutes, and cool naturally to obtain MgNb 2 o 6 Powder (MgNb 2 o 6 It is white with a little yellowish powder). In this embodiment, the ball mill was ball milled at a speed of 500 r / min for 30 hours.

[0090] C, making material: the concentration is the polyvinyl alcohol solution of 6% and MgNb 2 o 6 After the powder...

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Abstract

The invention provides a preparation method and a ball mill for a microwave dielectric ceramic test piece, and is used for solving the problem that a conventional microwave dielectric ceramic test piece is poor in dielectric property. The preparation method of the microwave dielectric ceramic test piece comprises the following steps: A, ball-milling to mix materials, B, screening and drying; C, preparing materials; D, forming; E, performing thermal treatment; F, performing surface treatment. The ball mill comprises a bracket as well as a motor and a drum, wherein the drum is internally provided with a cavity and is column-shaped; connecting rods which are positioned on a drum axis are arranged at two ends of the drum; one ends of the connecting rods are fixedly connected with the end part of the drum; the other ends of the connecting rods are inserted into the bracket; the connecting rods can rotate; the end parts of the ends, inserted into the bracket, of the connecting rods are sleeved with bearings; the motor is connected with the connecting rods through the bearings; the drum is internally provided with a plurality of zirconium balls. The test piece prepared by using the preparation method for the microwave dielectric ceramic test piece is good in dielectric property, and the ball mill is good in ball-milling effect.

Description

technical field [0001] The invention relates to a method for preparing a microwave dielectric ceramic test piece and a ball mill used in the method. Background technique [0002] Microwave dielectric ceramics have been widely used in the past thirty years, greatly promoting the development of microwave communication technology. p (1-x)CaTiO 3 / xCa(Mg 1 / 3 Nb 2 / 3 )O 3 (referred to as CMNT) series of composite microwave ceramics, finding the X value that matches the zero-frequency temperature coefficient (τf) and its process conditions is the key to the research of this type of microwave ceramics. [0003] Zhejiang Zhengyuan Electric Co., Ltd. currently mainly uses the solid-state method to prepare CMNT, but it requires high temperature conditions of 1500 ° C, high production costs, impure phases, pyrochlore phases, and poor microwave dielectric properties. [0004] Prepared MgNb 2 o 6 Then add CaCO 3 , to get Ca(Mg 1 / 3 Nb 2 / 3 )O 3 . After other treatment, finally g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/495
Inventor 黄元君吴志军
Owner JIAXING VOCATIONAL TECHN COLLEGE
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