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Beryllia ceramic clamping rod and manufacturing method thereof

A technology of beryllium oxide ceramics and a manufacturing method, which are applied to circuit components of transit time type electronic tubes and other directions, can solve the problems of lack of surface roughness processing ability, low density of beryllium oxide ceramic rods, difficult sintering of beryllium oxide ceramic rods, and the like, Achieve the effect of reducing the difficulty of ball milling and sintering temperature, reducing the use of organic volatiles, and high consistency

Active Publication Date: 2015-04-29
宜宾红星电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the domestic production process of beryllium oxide ceramic clamping rods includes ceramic material preparation, extrusion molding, firing, and grinding. This process has the following defects: 1. In the process of ceramic material preparation, more The organic additives, deglue time is long and the density of the beryllium oxide ceramic rod is low after sintering, which affects the thermal conductivity and the surface roughness processing ability is lacking, and the clamping rod products with the surface roughness less than 0.8 cannot be processed; 2. Extrusion The preparation cycle of the molded ceramic material is long, the utilization rate of the molded ceramic material is low, and the grinding process efficiency is low; 3. It is difficult to sinter the beryllium oxide ceramic rod, which requires special protective equipment and experienced operators

Method used

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  • Beryllia ceramic clamping rod and manufacturing method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0050] Weigh 50kg of beryllium oxide powder material, 0.25kg of magnesium trisilicate, 50kg of deionized water, and 220kg of zirconia balls, mix the beryllium oxide powder material and magnesium trisilicate to obtain a mixture, pour deionized water into the mixture and stir Then put the zirconia balls into the mixing bucket, turn on the ball mill mixer, the speed is 50RPM, then add the mixture, after the addition, adjust the speed of the mixer to 130RPM, and ball mill for 30min to detect the particle size of the slurry is 0.89μm;

[0051] Pass the ball-milled slurry through a 200-mesh sieve, and obtain about 100 kg of slurry after removing iron, pour all of it into the slow mixing tank of the spray granulator; weigh 1 kg of acrylic acid, and 10 L of polyvinyl alcohol aqueous solution (10% by mass fraction) , glycerol 0.2L, oleic acid 0.3L, SD-00 dispersant 2.5L, n-octanol 4.5L, these raw materials were added to the slow mixing barrel, stirred for 2 hours and mixed, and deionize...

Embodiment 2

[0058] Weigh 50kg of beryllium oxide powder material, 0.25kg of magnesium trisilicate, 50kg of deionized water, and 220kg of zirconia balls, mix the beryllium oxide powder material and magnesium trisilicate to obtain a mixture, pour deionized water into the mixture and stir bucket, then put the zirconia balls into the mixing bucket, turn on the ball mill mixer, the speed is 50RPM, and then add the mixture, after the addition, adjust the speed of the mixer to 130RPM, and ball mill for 30min to detect the particle size of the slurry is 0.92μm;

[0059] Pass the ball-milled slurry through a 200-mesh sieve, and get about 100kg of slurry after iron removal, and pour all of it into the slow mixing tank of the spray granulator;

[0060] Weigh 1kg of acrylic acid, 10L of polyvinyl alcohol aqueous solution (mass fraction is 10%), 0.2L of glycerol, 0.3L of oleic acid, 3L of SD-00 dispersant, and 5L of n-octanol. Mix for 2 hours, add deionized water during the mixing process to adjust th...

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Abstract

The invention belongs to the technical field of electronic function ceramic materials, particularly relates to a beryllia ceramic clamping rod and a manufacturing method thereof and aims to solve the technical problem of providing the manufacturing method of the beryllia ceramic clamping rod. The manufacturing method comprises the following steps: A, preparing beryllia powder into a spray granulation material; B, adopting dry pressing preforming and then manufacturing a flaky blank in an isostatic compaction manner; C, feeding the formed flaky blank in a push plate tunnel kiln for primary sintering, and carrying out flattening treatment through the sintering; D, using a flat grinder and a cutting machine to machine the blank into a clamping rod. The clamping rod manufactured by adopting the method is high in dimensional precision, and has the characteristics of high heat conductivity, high strength, good insulating strength, lower dielectric constant and dielectric loss and high chemical stability; the beryllia ceramic clamping rod plays supporting and radiating roles when being applied in a traveling wave tube, and is widely applied in the fields of electronic countermeasures, radar, communication, data transmission and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic functional ceramic materials, and in particular relates to a beryllium oxide ceramic clamping rod and a manufacturing method thereof. Background technique [0002] Beryllium oxide ceramics have always been important parts for electronic devices in national defense equipment. Because of its high thermal conductivity, good insulation, thermal shock resistance, low loss and good chemical stability, beryllium oxide ceramics are widely used in aerospace and aviation nuclear power engineering for high-power device heat dissipation. It has been widely used in electronic vacuum devices, high-power module thick-film circuits, packaging devices, and optoelectronic devices. [0003] With its advantages of wide frequency band and high gain, the helical traveling wave tube has been widely used in the fields of electronic countermeasures, radar, communication and data transmission, and occupies an important...

Claims

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Application Information

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IPC IPC(8): C04B35/08C04B35/622H01J23/27
Inventor 王刚叶均任鹏道王钢储齐晓
Owner 宜宾红星电子有限公司