A kind of preparation method of foamed boron nitride bulk material

A technology of boron nitride block and bulk materials, applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problems of complex preparation process, high cost, low yield, etc., achieve non-toxic methods and reduce production energy consumption And the effect of uniform cost and product appearance
CN106495109BActive Publication Date: 2018-07-31HEBEI UNIV OF TECH
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEBEI UNIV OF TECH
Publication Date
2018-07-31

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a preparation method of a foamed boron nitride block material. The preparation method comprises the following steps: (1) preparing a melamine-boric acid-water mixed solution; (2) carrying out ultrasonic treatment for 1h to 24h by an ultrasonic apparatus; separating out a white block body; (3) putting the white block body and a residual solution into a freezing dryer; freezing and pumping in vacuum to obtain a dried white solid precursor; (4) keeping the heat of the white solid precursor at 900 DEG C to 1500 DEG C for 2h to 6h under a protective atmosphere; cooling under the protective atmosphere to room temperature, so as to obtain a white block-shaped solid substance, namely a block-shaped boron nitride foam material. According to the preparation method of the foamed boron nitride block material, the energy consumption and cost of production are reduced; the method has no toxin and has high efficiency, and is applicable to large-scale and industrial synthesis of the foamed boron nitride block material; the prepared foamed boron nitride block material is composed of boron nitride micro-nano fibers with a high length-diameter ratio, and has the characteristics of good connectivity, large specific surface area, super hydrophobicity and the like.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The technical scheme of the present invention relates to the technical synthesis field of boron nitride micro-nano materials, and is specifically a method for synthesizing foamed boron nitride bulk materials. Background technique

[0002] Boron nitride, also known as white graphite. Due to its superior properties such as high thermal conductivity, chemical stability, light transparency, electrical insulation, neutron absorption performance, lubricity, etc., it has received very extensive attention and has been used in machinery, metallurgy, electronics, aerospace And other fields.

[0003] The foamed boron nitride bulk material is a kind of three-dimensional network structure which is connected or assembled by one-dimensional boron nitride fibers or two-dimensional boron nitride sheets. While the foamed boron nitride bulk material perfectly inherits the superior properties of boron nitride, its structure itself has low density, high porosity, high specific ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More