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Functional ceramic low voltage discharge compression forming method

A technology for press forming and functional ceramics, applied in ceramic forming machines, manufacturing tools, etc., which can solve the problems of difficult to increase compaction density, high price, and complex production.

Inactive Publication Date: 2007-07-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the cost of equipment is high, the production is complicated, and it requires both a mechanical force transmission system and a device for generating pulse current, which also consumes a lot of mold materials.
Due to the special process requirements of sensor-type functional ceramics, its body is only suitable for hydraulic or mechanical pressure forming, but the hydraulic forming equipment is expensive, and in mechanical forming, it is difficult to increase the compaction density due to insufficient force.

Method used

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  • Functional ceramic low voltage discharge compression forming method
  • Functional ceramic low voltage discharge compression forming method
  • Functional ceramic low voltage discharge compression forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 uses TiO 2 Powder for experiment

[0022] 1. Experimental process:

[0023] 1. Powder preparation

[0024] TiO 2 The powder is pre-fired at 1150° and kept for 4 hours to convert it into a rutile phase, then placed in a ball mill, wet-milled with absolute ethanol in a high-speed ball mill for 4 hours, dried, hand-ground, and set aside.

[0025] 2. Compression process

[0026] TiO 2 4wt% polyvinyl alcohol solution is added to the powder as a binding agent in an amount of 2% of the weight of the powder, then fully ground in a mortar and passed through a 40-mesh sieve. In the pressing experiment, firstly, the quality of the pressed powder is fixed each time, and the parameters of the discharge voltage are changed, and 10--15 samples are pressed every 100v between 400-1100v. Secondly, change the quality of the pressed powder, and change the voltage to press the sample as before to analyze the influence of the shape factor (height-to-diameter ratio) on the ...

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Abstract

The invention relates to a kind of press shaping method with low voltage discharge of the function ceramic. First put function ceramic powder that has been confected well in polyethylene alcohol solution to get mucus. Grind and griddle the mucus with a 40-hole screen. Put certain amount in concave module of the low voltage electromagnetism pressing mechanism and discharge to press with voltage 700~900 for one or two times, demould then get the finished product. The invention discharges instantly by energy storage capacitance to form a strong impulse magnetic field so as to shape the blank fast. The blank is pressed well and has high consistency and fine and even particle.

Description

technical field [0001] The invention relates to a compacting technology of a ceramic material green body. In particular, it relates to a low-voltage discharge pressing forming method for functional ceramics. Background technique [0002] Powder metallurgy is an effective way to produce various high-performance structural materials, special functional materials and working materials under extreme conditions. In recent years, it has developed from a single material manufacturing technology to an emerging technology science that integrates material preparation, processing and forming, and is the frontier field of material science development today. Research and development of effective high-density, high-performance ceramic powder forming technology is the key to promoting the development and preparation of functional ceramic materials. [0003] Compressing powder materials with strong impact loads is an effective way to obtain high-density powder products. In 1952, the Amer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/00
Inventor 黄尚宇陈堰波李友成吴彦春孟正华
Owner WUHAN UNIV OF TECH
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