Porous high-entropy hexaboride ceramic and preparation method thereof

A hexaboride, porous ceramic technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of increasing the thermal conductivity of porous materials, increasing the temperature and pressure of the substrate, and sintering porous materials, and achieving high porosity and high porosity. The effect of high porosity and air permeability
CN110615681AInactive Publication Date: 2019-12-27AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
Publication Date
2019-12-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to porous high-entropy hexaboride ceramic and a preparation method thereof. The invention relates to an ultrahigh-temperature porous high-entropy hexaboride ceramic, in particular to an ultrahigh-temperature porous high-entropy hexaboride ceramic with low density, high strength, high porosity and high air permeability and a method for preparing the ultrahigh-temperature porous high-entropy hexaboride ceramic by utilizing high-temperature gas-solid phase reaction and high-temperature partial sintering under a vacuum condition. The invention belongs to to the field of superhigh temperature porous ceramics, wherein the low density refers to that the density is not greater than 1.73 g / cm<3>, the high strength refers to that the strength is not less than 11 MPa, the high porosity refers to that the porosity is not less than 64%, the high air permeability refers to that the air permeability is not less than 2.65*10 <-11> m<2>, and the high entropy refers to that the types of metal elements in the hexaboride ceramic are not less than five.
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Description

technical field

[0001] The invention relates to a porous high-entropy hexaboride ceramic and its preparation method, in particular to a low-density, high-strength, high-porosity, high-permeability ultra-high-temperature porous high-entropy hexaboride ceramic and its use of high-temperature gas under vacuum conditions. A method for preparing ultra-high-temperature porous high-entropy hexaboride ceramics by solid-state reaction and high-temperature partial sintering, which belongs to the field of ultra-high-temperature porous ceramics. The low density refers to a density not greater than 1.73g / cm 3 , high strength means that the strength is not lower than 11MPa, high porosity means that the porosity is not lower than 64%, high air permeability means that the air permeability is not lower than 2.65×10 -11 m 2 , High entropy means that the types of metal elements in hexaboride ceramics are not less than five. Background technique

[0002] The existing high-temperature heat-ins...

Claims

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