99% 含量 绿色碳化硅 W7 晶粒度

常见绿色碳化硅微粉尺寸

Green silicon carbide abrasive is a type of artificial corundum with a green color and sharp, brittle characteristics. It is primarily produced using petroleum coke and high-quality silica as the main raw materials, with the addition of table salt as an additive. The synthesis involves high-temperature smelting in a resistance furnace.

Based on the size of the green silicon carbide particles, it is classified into 绿色碳化硅砂粒micro-powder. Different forms are applied in vastly different fields. In this article, we will mainly explore the wide-ranging applications of green silicon carbide micro-powder in the field of polishing.

Common Particle Sizes in Green Silicon Carbide Micro Powder Production:

As one of the premier silicon carbide manufacturers in China, our produced silicon carbide abrasives adhere to the W, JIS, and FEPA standards. The following are the particle size specifications corresponding to each production standard for green silicon carbide micro powder:

Green silicon carbide powder

W(standard)

W63 W50 W40 W28 W20 W14 W10 W7 W5 W3.5 W2.5 W1.5

JIS(standard)

#240 #280 #320 #360 #400# #500 #600 #700 #800 #1000 #1200 #1500 #2000 #2500#3000 #4000 #6000 #8000 #10000

FEPA(standard)

F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 F2000

Which grit size should be chosen for polishing and fine grinding with green silicon carbide?

If you intend to use green silicon carbide micro powder for polishing and fine grinding, it is recommended to use 99%-content green silicon carbide micro powder W7 or JIS#2500 grade. The following are the characteristics of green silicon carbide micro powder W7 (or JIS#2500 grade):

Particle Shape: angular particles that contribute to improved polishing effectiveness and grinding efficiency.

颜色 Green, giving it a distinctive appearance.

硬度 Exhibits high hardness with a Vickers hardness of 2600 kgf/mm2, a Mohs hardness of at least 9.4, and a Knoop hardness ranging between 3100-3400 kg/mm2. This makes it suitable for polishing and grinding hard materials.

Melting Point: Has a high melting point; the melting point of green silicon carbide micro powder W7 is 2600°C, showcasing heat-resistant properties suitable for use in high-temperature environments.

Thermal Conductivity: Demonstrates good thermal conductivity with specific values of 210 btu/hr/ft2/in/°F (at 400°F) and 100 btu/hr/ft2/in/°F (at 1600°F).

Density: Possesses a relatively high density with a specific gravity of 3.2 g/cm3, contributing to the stability of particles during the grinding process.

Thermal Conductivity Coefficient: Has a moderate thermal conductivity coefficient of 0.013 cal/cm2/sec (at 900°C).

Coefficient of Thermal Expansion: In the temperature range of 0–1600 °C, the coefficient of thermal expansion is 7-9 x 10-6/°C, indicating low thermal expansion performance.

纯净: high purity, meeting the 99% content standard for silicon carbide production, ensuring consistent performance in applications.

Particle Size Distribution (JIS#2500):

D10(μm): 3.896

D50(μm): 6.573

D90(μm): 10.847

D(3,2)(μm): 4.947

D(4,3)(μm): 7.027

Green silicon carbide is used for polishing and fine grinding

Physical Properties of 99% Content Green Silicon Carbide Micro Powder W7:

Physical properties

numerical value

Knoop hardness

2600kgf/mm²

Vickers hardness

3100-3400kg/mm²

Moh’s hardness

9.4 min

melting point

2600°C(dissociated at high temperature)

thermal conductivity

210 btu/hr/ft²/in/°F(400°F)

 

100 btu/hr/ft²/in/°F(1600°F)

proportion

3.2 g/cm³

导热性

0.013 cal/cm².sec(900°C)

Thermal expansion coefficient

7-9 x10⁻⁶/℃(0-1600°C)

particle shape

angular particles

color

green

Chemical Specifications of 99% Content Green Silicon Carbide Micro Powder W7:

Chemical indicators

MicropowderJIS240-JIS600

700-JIS2000

JIS2500-JIS4000

JIS6000-JIS10000

SiC

≥99.0%

≥98.5%

≥98.2%

≥98.0%

SiO₂

≤0.20%

≤0.20%

≤0.30%

≤0.30%

F, Si

≤0.20%

≤0.20%

≤0.20%

≤0.50%

Fe₂O₃

≤0.40%

≤0.40%

≤0.50%

≤0.80%

F.C

≤0.1%

≤0.1%

≤0.3%

≤0.3%

Specific Applications of 99% Content Green Silicon Carbide Micro Powder W7

Lens Polishing: Precision polishing for hard optical glass such as camera lenses, ensuring high-quality surface smoothness.

Hard Metal Tool Treatment: Sandblasting and edge processing for hard metal CNB tools like titanium alloy and hard alloys, enhancing tool surface quality and wear resistance.

Quartz Glass Polishing: Grinding and polishing quartz glass to ensure high precision and high clarity, suitable for optical and electronic industries.

These applications fully demonstrate the outstanding performance of 99% content green silicon carbide micro powder W7 in the polishing and grinding of high-precision and high-hardness materials. Its superior physical and chemical properties make it an ideal choice for many advanced manufacturing processes in the industrial sector.

With 18 years of expertise in silicon carbide and abrasive production, Yafeite can provide you with solutions that better suit your needs. For more product knowledge, click here.

常见问题

What are the particle size standards for 99% content green silicon carbide W7?

Green silicon carbide micro powder W7 complies with W, JIS, and FEPA standards. Specific particle sizes include W63, W50, W40, W28, W20, W14, W10, W7, as well as JIS #240 to JIS #2000 and FEPA F230 to F2000.

In which polishing and grinding scenarios is green silicon carbide micro powder W7 suitable?

It is recommended to use 99% content green silicon carbide micro powder W7 or JIS #2500 for polishing, especially for lens polishing, hard metal tool treatment, and quartz glass polishing. It performs exceptionally well in polishing and grinding high-precision and high-hardness materials.

Why choose green silicon carbide micro powder W7 for polishing and fine grinding?

Green silicon carbide micro powder W7 has sharp-edged particles, high hardness, a high melting point, good thermal conductivity, and stable density. It is suitable for polishing and grinding hard materials, ensuring high-quality surface smoothness.

What are the physical and chemical properties of 99% content green silicon carbide micro powder W7?

W7’s physical properties include a Nuplex hardness of 2600 kgf/mm², Vickers hardness of 3100-3400 kg/mm², melting point of 2600°C, etc. Chemical indicators include SiC content ≥99.0%, SiO₂ ≤0.20%, F, Si ≤0.20%, etc.

What are the specific applications of green silicon carbide micro powder W7 in the polishing field?

 W7 is widely used in lens polishing, hard metal tool treatment, and quartz glass polishing. It excels in these fields, providing an ideal choice for high-end manufacturing processes.

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