High-porosity mullite whisker porous ceramic tube and preparing method

A technology of mullite whisker and high porosity, which is applied in the field of mullite whisker porous ceramic tube and its preparation, can solve the problems of powder agglomeration, low porosity of green mullite whisker, etc. Reduced aggregate agglomeration and uniform slurry
CN108264338AInactive Publication Date: 2018-07-10QILU UNIV OF TECH
1 Cites 16 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QILU UNIV OF TECH
Publication Date
2018-07-10
Estimated Expiration
Not applicable · inactive patent

Smart Images

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

Abstract

The invention discloses a high-porosity porous ceramic tube formed by interlocking uniform mullite whiskers and a preparing method of the ceramic tube. Three types of powder including an aluminum source, a silicon source and a whisker growth catalyst are evenly mixed and then dispersed in an organic solution which is obtained by dissolving PESF and PVP in an NMP solvent, the liquid is mixed and ball-milled evenly and then placed in a die for extrusion phase conversion forming, and a ceramic tube blank is obtained. The blank is sintered at the temperature of 1300-1500 DEG C, the whiskers grow in situ and form an interlocked structure, and therefore the high-porosity mullite whisker porous ceramic tube with the porosity larger than 70% and the breaking strength larger than about 3 MPa is obtained. The mullite whisker porous ceramic tube can be applied in the fields of thermal insulation and preservation, noise reduction, catalyst carrier and gas-solid separation and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of porous ceramics and preparation, and in particular relates to a mullite whisker porous ceramic tube and a preparation method thereof. Background technique

[0002] Porous mullite ceramics have good chemical stability, low thermal conductivity and thermal expansion coefficient, and good thermal shock resistance, and have attracted widespread attention in recent years. Porous mullite ceramics have great application value in thermal insulation, noise reduction, catalyst carrier and separation and purification. Mullite crystals have anisotropic growth characteristics, and it is easy to grow into one-dimensional nano-whiskers in the presence of catalysts. This feature can effectively inhibit ceramic sintering shrinkage during in-situ reaction preparation of porous mullite ceramics, and is beneficial to the preparation of high-porosity mullite ceramics. Therefore, mullite ceramics with whisker interlocking st...

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