Boron nitride-strontium feldspar high-temperature wave-transparent composite ceramic material and preparation method thereof

A technology of high-temperature wave-transparent and multi-phase ceramics, which is applied in the field of preparation of ceramic matrix composite materials, can solve the problems of restricting the application of strontium feldspar, low density thermal expansion coefficient, poor processability, etc., achieve good mechanical properties and processability, and improve Workability, strength and toughness improvement effects

Active Publication Date: 2021-06-25
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Strontium feldspar has the advantages of low density, small thermal expansion coefficient, good high temperature stability, excellent dielectric properties and excellent chemical stability. It has a wide range of application prospects; however, due to the excellent thermal and dielectric properties of strontium feldspar, it also has the characteristics of poor processability, which greatly limits the application of strontium feldspar in practical engineering

Method used

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  • Boron nitride-strontium feldspar high-temperature wave-transparent composite ceramic material and preparation method thereof
  • Boron nitride-strontium feldspar high-temperature wave-transparent composite ceramic material and preparation method thereof
  • Boron nitride-strontium feldspar high-temperature wave-transparent composite ceramic material and preparation method thereof

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preparation example Construction

[0033] In order to solve the problem of abparability of ruthenium longshite, the present invention provides a method of preparing a boron nitride-barium longite high-temperature transmission and apron ceramic material and a preparation method of the correction ceramic material. See figure 1 As shown, the preparation method of the boron nitride-ruthenium longshite high-temperature transmission and phase ceramic material includes the following steps:

[0034] S1: It is called mixed with hexagonal boron nitride powder to obtain raw material powder.

[0035] S2: The raw material powder is ground to obtain a ball milling powder;

[0036] S3: The resulting ball mill is stirred and dried to obtain a raw material powder;

[0037] S4: Cold pressure of the raw material powder to obtain a raw material blank;

[0038] S5: The raw material blank is hot and other static pressure sintering to obtain a boron nitride-rigidal longite high-temperature transmission of transparent ceramic material.

...

Embodiment 1

[0063] This embodiment provides a method for preparing a boron nitride-ruthenium longshite high-temperature transmission of a pose ceramic material comprising:

[0064] S1: It is known that the particle size is 200 megadownload55.25 g and the particle size of 100 mesh, the purity of 99 wt% is mixed, and the raw material powder is obtained.

[0065] S2: Place the raw material powder in a polytetrafluoroethylene ball, using alumina balls, add absolute ethanol for wet ball milling for 24 hours to obtain a ball mill;

[0066] S3: After stirring the resulting ball milling powder under 60 ° C for 24 hours, then 100 mesh sieve, resulting in a raw material powder;

[0067] S4: Pour the raw material powder into a diameter of 50 mm, and the inner wall coated with a boron nitride in a steel mold for 3 minutes to obtain a raw material blank;

[0068] S5: The raw material blank is hot and other static pressure sintering to obtain a boron nitride-rigidal longite high-temperature transmission of...

Embodiment 2

[0081] Unlike the examples, the present embodiment provides a method for preparing a boron nitride-barium longite high-temperature transmission of the phase ceramic material, which includes:

[0082] S1: It is known that the particle size is 200 megadownloadtebiting 16.75 g of a hexagonal boron nitride powder 50.25 g of a particle size of 100 mesh and a purity of 99 wt%, resulting in a raw material powder;

[0083] S2: Place the raw material powder in a polytetrafluoroethylene ball, using alumina balls, add absolute ethanol for wet ball milling for 24 hours to obtain a ball mill;

[0084] S3: After stirring the resulting ball milling powder under 60 ° C for 24 hours, then 100 mesh sieve, resulting in a raw material powder;

[0085] S4: Pour the raw material powder into a diameter of 50 mm, and the inner wall coated with a boron nitride in a steel mold for 3 minutes to obtain a raw material blank;

[0086] S5: The raw material blank is hot and other static pressure sintering to obt...

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Abstract

The invention discloses a boron nitride-strontium feldspar high-temperature wave-transparent composite phase ceramic material and a preparation method thereof, and relates to the field of preparation of ceramic matrix composite materials. The boron nitride-strontium feldspar high-temperature wave-transparent composite phase ceramic material The preparation method includes: S1: weighing strontium feldspar powder and mixing hexagonal boron nitride powder to obtain raw material powder; S2: ball milling the raw material powder to obtain ball milling powder; S3: ball milling the powder Stirring and drying to obtain raw material powder; S4: cold pressing the raw material powder to obtain a raw material green body; S5: performing hot isostatic sintering on the raw material green body to obtain boron nitride-strontium feldspar high-temperature transparent Wave complex phase ceramic materials. The preparation method of boron nitride-strontium feldspar high-temperature wave-transparent composite ceramic material provided by the present invention introduces hexagonal boron nitride into strontium feldspar, so that the prepared composite ceramic material not only has good machinability, but also It has good dielectric and high temperature resistance properties.

Description

Technical field [0001] The present invention relates to the field of preparation of ceramic matrix composites, and more particularly to a boron nitride-rigida-barium longshine high temperature transparent phase ceramic material and a preparation method thereof. Background technique [0002] Biglium longshine has the advantages of low density, small thermal expansion coefficient, good high temperature stability, excellent dielectric performance and excellent chemical stability, all in the aerospace, aerospace industry and automotive, environmental protection, metallurgy, chemical and electronic industries, etc. There is a wide range of application prospects; however, due to ruthenium longstone while having excellent thermodynamic and dielectric properties, there is also a feature of processability, thereby greatly limiting the application of ruthenium longshine in actual engineering. [0003] In view of the above defects, the creators of the present invention have finally obtained...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/195C04B35/583C04B35/622C04B35/645
CPCC04B35/195C04B35/583C04B35/622C04B35/6455C04B2235/3481C04B2235/386C04B2235/5427C04B2235/602C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/658
Inventor 蔡德龙贾德昌杨治华段小明何培刚王胜金周玉
Owner HARBIN INST OF TECH
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