Method for preparing porous titanium nitride ceramics
A technology for preparing titanium nitride ceramics and ceramics, which is applied in the fields of ceramic products, applications, household appliances, etc., which can solve the problems of high cost, difficulty in complete nitriding of titanium powder, increased preparation costs, etc., and achieve the effect of low production cost
Inactive Publication Date: 2016-05-11
SHAANXI HUANKE BIOLOGICAL TECH CO LTD
View PDF0 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The traditional preparation method of titanium nitride porous ceramic material is mainly based on the direct nitriding method. The porous titanium is prepared by using titanium powder as the main raw material, and then the titanium nitride porous ceramic is prepared by nitriding reaction in nitrogen gas. The disadvantage is that during the nitriding process, a titanium nitride film will be formed on the surface of the titanium powder, which seriously hinders the nitriding process of the titanium powder, making it difficult for the titanium powder to be completely nitrided. Some studies have found that using specially treated titanium powder for the nitriding reaction can Realize complete nitriding, but titanium powder needs special treatment, which increases the preparation cost
Therefore, the production process of the direct nitriding method is complicated, the cost is too high, and the purity of the prepared titanium nitride porous ceramics is not high, which is not conducive to industrial production.
Method used
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
View moreExamples
Experimental program
Comparison scheme
Effect test
specific Embodiment
[0009] Specific examples: TiO 2 Mix with carbon black at a molar ratio of 1:2, put the prepared powder and grinding balls into the mixing tank, and use absolute ethanol as the medium to wet mix with a planetary ball mill for 24 hours. After the mixing is completed, put the slurry Put it in a drying oven to dry, and then sieve it with a 200-mesh sieve, put the powder evenly into the mold, and press it with the weight of the hammer of the press without loading to form a regular cuboid sample , the sample was placed in a graphite crucible coated with BN, then put into a multifunctional furnace, and sintered under a nitrogen pressure of 0.5MPa to obtain porous titanium nitride ceramics. The sintering temperature was 1650°C, and the sintering time was 2h. As follows: (1) Start heating, heat to 300°C after 10 minutes; (2) Continue heating, heat to 1200°C after 1 hour, and keep at this temperature for 5 minutes; (3) Heat to holding temperature after 4 hours, holding temperature is 16...
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 PUM
| Property | Measurement | Unit |
|---|---|---|
| porosity | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a method for preparing porous titanium nitride ceramics, and belongs to the field of preparation of functional materials. The method for preparing the porous titanium nitride ceramics has the advantages that the porous titanium nitride ceramics are high in porosity and low in preparation cost; porous titanium nitride is mainly made of inexpensive titanium oxide powder and carbon black by the aid of the carbon thermal reduction method; raw materials of the porous titanium nitrite ceramics are inexpensive, the porous titanium nitride ceramics are low in production cost, and the porosity of the porous titanium nitride ceramics prepared by the aid of the method can reach 78.6%.
Description
technical field [0001] The invention belongs to the field of preparation of functional materials, in particular to a method for preparing porous titanium nitride ceramics. Background technique [0002] Titanium nitride ceramics are a new type of high-strength, refractory and wear-resistant ceramic materials, which have excellent chemical stability and oxidation resistance, as well as high electrical conductivity and superconducting critical temperature, so they are widely used. Titanium nitride ceramic coating can improve the wear resistance of cutting tools and increase the service life of cutting tools. Titanium nitride ceramics can also be used in chemical devices such as thermocouple protection sleeves and heat exchangers. In addition, titanium nitride ceramics can be used as electrodes and electrical contacts for molten salt electrolysis. Titanium nitride porous ceramics is a new type of ceramic material that has gradually emerged on the basis of research on titanium ...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B38/00
Inventor 郝青
Owner SHAANXI HUANKE BIOLOGICAL TECH CO LTD