Strontium feldspar based composite ceramic wave-transmitting material and preparation method thereof

A technology of composite ceramics and wave-transmitting materials, which is applied in the field of strontium feldspar-based composite ceramic wave-transmitting materials and their preparation, can solve the problems of limited application of strontium feldspar, poor machinability, low density and low thermal expansion coefficient, etc. Difficulty in regulation, high density, and the effect of improving processability

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

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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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  • Strontium feldspar based composite ceramic wave-transmitting material and preparation method thereof
  • Strontium feldspar based composite ceramic wave-transmitting material and preparation method thereof
  • Strontium feldspar based composite ceramic wave-transmitting material and preparation method thereof

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[0031] In order to solve the problem of poor machinability of strontium feldspar, the present invention provides a strontium feldspar-based composite ceramic wave-transparent material and a preparation method of the strontium-feldspar-based composite ceramic wave-transparent material, see figure 1 As shown, wherein the preparation method of the strontium feldspar-based composite ceramic wave-transparent material comprises the following steps:

[0032] S1: Weigh h-BN powder, SrCO 3 Powder, Al 2 o 3 Powder and SiO 2 powder and mix to obtain the first powder;

[0033] S2: ball milling the obtained first powder to obtain a second powder;

[0034] S3: pressing the obtained second powder into a green body to obtain a prefabricated green body;

[0035] S4: performing pressureless sintering on the prefabricated green body to obtain a strontium feldspar-based composite ceramic wave-transmitting material.

[0036] In order to improve the toughness of strontium feldspar, the presen...

Embodiment 1

[0059] This embodiment provides a method for preparing a strontium feldspar-based composite ceramic wave-transmitting material, the preparation method comprising:

[0060] S1: Weigh 36.8g of h-BN powder with a particle size of 100 mesh and a purity of 99wt%, and SrCO with a particle size of 200 mesh and a purity of 99.5wt%. 3 Powder 28.4g, particle size is 200 mesh, purity is 99.5wt% Al 2 o 3 Powder 21.75g, and SiO with a particle size of 200 mesh and a purity of 99.5wt% 2 Powder 26.2g was mixed to obtain the first powder;

[0061] S2: placing the obtained first powder in an alumina ball mill tank, and using a planetary ball mill with a rotation speed of 350 rpm for 24 hours to obtain a second powder;

[0062] S3: Pour the second powder into a rubber sheath with a diameter of 30 mm, and cold isostatically press at a pressure of 200 MPa for 5 minutes to get out of the green body to obtain a prefabricated green body;

[0063] S4: Perform pressureless sintering on the prefabr...

Embodiment 2

[0076] This embodiment provides a method for preparing a strontium feldspar-based composite ceramic wave-transmitting material, the preparation method comprising:

[0077] S1: Weigh 22.9g of h-BN powder with a particle size of 100 mesh and a purity of 99wt%, and SrCO with a particle size of 200 mesh and a purity of 99.5wt%. 3 Powder 19.88g, particle size is 200 mesh, purity is 99.5wt% Al 2 o 3 Powder 15.23g, and SiO with a particle size of 200 mesh and a purity of 99.5wt% 2 Powder 18.34g was mixed to obtain the first powder;

[0078] S2: placing the obtained first powder in an alumina ball mill tank, and using a planetary ball mill with a rotation speed of 250 rpm for 12 hours to obtain a second powder;

[0079] S3: Pour the second powder into a rubber sheath with a diameter of 30 mm, and cold isostatically press at a pressure of 100 MPa for 20 minutes to get out of the green body to obtain a prefabricated green body;

[0080] S4: Perform pressureless sintering on the pref...

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Abstract

The invention discloses a strontium feldspar-based composite ceramic wave-transparent material and a preparation method thereof, and relates to the technical field of preparation of ceramic-based composite materials. The preparation method of the strontium feldspar-based composite ceramic wave-transparent material includes: S1: weighing h ‑BN powder, SrCO 3 Powder, Al 2 o 3 Powder and SiO 2 powder and mix to obtain a first powder; S2: ball mill the first powder to obtain a second powder; S3: press the second powder into a green body to obtain a prefabricated green body; S4: The prefabricated green body is subjected to pressureless sintering to obtain a strontium feldspar-based composite ceramic wave-transmitting material. The preparation method of strontium feldspar-based composite ceramic wave-transparent material provided by the present invention introduces h-BN into strontium feldspar through in-situ synthesis reaction, so that the prepared strontium feldspar-based composite ceramic wave-transparent material not only has good mechanical properties And machinability, at the same time, also has good dielectric and thermal shock resistance.

Description

technical field [0001] The invention relates to the technical field of preparation of ceramic-based composite materials, in particular to a strontium feldspar-based composite ceramic wave-transmitting material and a preparation method thereof. Background technique [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 wide application prospects; however, due to its excellent thermal and dielectric properties, strontium feldspar also has the characteristics of poor processability, which greatly limits the application of strontium feldspar in practical engineering. [0003] In view of the above-mentioned defects, the creator of the present invention has finally obtained the present invention through long-term research and practice. Contents of the invention [0004] In order to solve the above-mentioned technical defects, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/195C04B35/622C04B35/626
CPCC04B35/195C04B35/622C04B35/6261C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/661C04B2235/668
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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