Method for manufacturing silicon nitride powder
A technology for silicon nitride powder and manufacturing method, which is applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problems of high silicon nitride powder, difficulty in obtaining sinterability, etc., and achieves improved sinterability and great usefulness. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment
[0099] Hereinafter, although an Example is shown in order to demonstrate this invention more concretely, this invention is not limited to these Examples.
[0100] In addition, in an Example, the measurement of various physical properties was performed by the following method.
[0101] (1) Particle size of silicon nitride powder
[0102] Pretreatment of samples;
[0103] As a pretreatment of the silicon nitride powder of the sample, the silicon nitride powder was baked at a temperature of about 500° C. for 2 hours in air. The above-mentioned calcination treatment has the following cases: in the measurement of the particle size, the surface oxygen content of the silicon nitride powder is small, or the surface of the particles is covered with a hydrophobic substance due to the pulverization aid during pulverization, and the particles themselves exhibit hydrophobicity. In some cases, the dispersion in water may become insufficient and reproducible particle size measurement may b...
Embodiment 1
[0159] In the method for producing silicon nitride powder in Example 1, the bulk density of the raw material powder at the time of ignition was set to a high value as shown in Table 1, and the combustion synthesis reaction was performed to obtain a bulk product made of silicon nitride. The crushing and pulverization of the obtained silicon nitride aggregates were carried out under the same conditions as in Example 1. As a result, substantially β-type 100% silicon nitride powder having the properties shown in Table 1 was obtained.
[0160] [Sintered Body 4]
[0161] Using the above-mentioned silicon nitride powder, a sintered body was produced under the same conditions as the sintered body 2 of Example 1. As a result, a silicon nitride sintered body shown in Table 2 was obtained. The characteristics of the sintered body were excellent as in the above-mentioned sintered body 2 .
Embodiment 3
[0163] In the production method of the silicon nitride powder of Example 1, the bulk density of the raw material powder at the time of ignition is set as a low value as shown in Table 1, and the combustion synthesis reaction is carried out, and the pressure during the reaction is also low, and the same method as in Example 1 is used. 1 Synthesize silicon nitride powder in the same way. As a result, the obtained silicon nitride powder contained about 20% of α-type β-type silicon nitride. Table 1 shows the characteristics of the obtained silicon nitride powder.
[0164] [Sintered body 5]
[0165] A sintered body was produced under the same conditions as the sintered body 2 of Example 1 using the above-mentioned α-type silicon nitride powder, and as a result, a silicon nitride sintered body shown in Table 2 was obtained. The characteristics of the sintered body were excellent as in the above-mentioned sintered body 2 .
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| shrinkage | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More - R&D
- Intellectual Property
- Life Sciences
- Materials
- Tech Scout
- Unparalleled Data Quality
- Higher Quality Content
- 60% Fewer Hallucinations
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com