Microwave auxiliary thermal treatment method for ceramic fibre and thermal insulation body structure

A heat treatment method and microwave-assisted technology, which is applied in the field of ceramic fibers, can solve the problems of microwave-assisted heat treatment limitations and unreported applications, and achieve the effects of shortening heating time, good heat preservation effect, and improving uniformity and consistency

Inactive Publication Date: 2009-07-29
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of piezoelectric ceramics, microwave heat treatment and microwave-assisted heat treatment are limited to the preparation of bulk, powder, and flake ceramics (Pramod K Sharma, Z Ounaies, V V Varadan and V KVaradan. Dielectric and piezoelectric properties of microwave sintered PZT .Smart Mater.Struct.10 (2001) 878-883), there are few reports on microwave heat treatment and microwave-assisted heat treatment of ceramic fibers abroad, but there is no report on the application of this aspect in China

Method used

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  • Microwave auxiliary thermal treatment method for ceramic fibre and thermal insulation body structure
  • Microwave auxiliary thermal treatment method for ceramic fibre and thermal insulation body structure
  • Microwave auxiliary thermal treatment method for ceramic fibre and thermal insulation body structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) prepare the insulating body structure that the present invention uses, as figure 1 As shown in , it includes a microwave oven body 1, in which an insulating body is arranged, and the insulating body includes an outer layer insulating body 2 and a second outer layer Al 2 o 3 Insulation body 3. In the sub-outer Al 2 o 3 A microwave auxiliary absorption medium 4 is provided between the heat preservation body 3 and the inner crucible 5 . The outer layer insulation body 2 is provided with insulation bricks 7, the outer layer insulation cover plate 8 and the inner layer insulation cover plate 9, and the outer layer insulation body 2 has a double-layer cover plate insulation structure; the outer layer insulation body 2 and the second outer layer Al 2 o 3 An insulating space is provided between the insulating bodies 3 . Sub-outer Al 2 o 3 The thermal insulation body 3 is a thermal insulation structure with a single-layer cover plate. The microwave-assisted absorpti...

Embodiment 2

[0028] Same as Example 1, except that when pre-fired for 40 minutes under the condition of microwave power of 700W, the obtained lead zirconate titanate ceramic fiber has a single perovskite phase, the surface is relatively smooth and smooth, and the structure is relatively dense.

Embodiment 3

[0030] Same as Example 1, except that when pre-fired for 30 minutes under the condition of microwave power of 800W, the obtained lead zirconate titanate ceramic fiber has a single perovskite phase and a denser structure.

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PUM

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Abstract

The invention provides a microwave auxiliary heat treatment method for ceramic fiber, and a heat insulator structure thereof, and relates to a ceramic fiber. The invention provides the microwave auxiliary heat treatment method for ceramic fiber, and the heat insulator structure thereof. The prepared fiber has a single-phase structure, has the length-diameter ratio more than 200, is compact in inside, and can be used for 1-3 type piezoelectric composite materials. The ceramic fiber is obtained by putting gel fiber into a crucible, putting the crucible with the gel fiber into a heat insulator, presintering the whole heat insulator in a microwave oven and then subjecting the presentered fiber to heat treatment in a muffle furnace. The heat insulator structure thereof is provided with an outer-layer heat insulator, a secondary-outer-layer Al2O3 heat insulator and an inner-layer crucible, and a microwave auxiliary absorbing medium is arranged between the secondary-outer-layer Al2O3 heat insulator and the inner-layer crucible.

Description

technical field [0001] The invention relates to a ceramic fiber, in particular to a microwave-assisted heat treatment method of the ceramic fiber and an insulating body structure thereof. Background technique [0002] Piezoelectric materials are widely used in sonar transducers, ferroelectric memories, gratings, sensors, biomedical imaging, ultrasound engineering and many other aspects. Piezoelectric ceramics not only have large piezoelectric constant, electromechanical coupling coefficient and dielectric constant, but also have small mechanical loss and dielectric loss. With the wide application of electronic information technology and intelligent composite materials, piezoelectric ceramic materials are developing towards the form of thin film and fiber. After the piezoelectric fiber is combined with the polymer material, the shortcomings of the two are overcome, and a piezoelectric composite material with both piezoelectric properties and flexibility is formed. Moreover, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/64
Inventor 熊兆贤潘捷麦满芳
Owner XIAMEN UNIV
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