99%碳化矽綠碳化矽砂F70
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99%碳化矽綠碳化矽砂F70產品介紹
99%碳化矽綠碳化矽砂F70適用於碳化矽砂輪。它的硬度僅次於金剛石和B4C，比黑碳化矽還要硬。因此適用於磨削鈦合金、大理石、硬質合金、光學玻璃、陶瓷等大範圍的硬質材料。
綠色碳化矽是在電阻式爐中用夸脫的沙子和石油焦在高溫下生產的。綠色碳化矽的SiC純度高達99%min。它是一種具有高導熱性和高強度的人造脆性SiC，在1000攝氏度時不會降低。
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99%碳化矽綠碳化矽砂F70的典型物理性能
| 莫氏硬度： | 9.5 |
| 維氏硬度： | 3100-3400kg/mm2 |
| 比重： | 3.2g/cm 3 |
| 堆積密度（LPD）： | 1.2-1.6克/厘米3 |
| 顏色： | 綠 |
| 顆粒形狀： | 六角形 |
| 熔點： | 約2600攝氏度解離 |
| 最高使用溫度： | 1900攝氏度 |
| 脆性 | 易碎的 |
| 導熱係數 | 0.013 卡/cm2.sec (900°C) |
| 熱膨脹係數 | 7-9×10-6/℃（0-1600℃） |
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99%碳化矽綠碳化矽砂F70的化學分析
| 典型的化學分析 | ||
| 化學成分 | F20-F220 | F230-F2000 |
| 碳化矽 | 最低 99% | 最低 98.5% |
| 二氧化矽_ | 最大 0.50% | 最大 0.70% |
| F、矽 | 最大 0.20% | 最大 0.40% |
| 鐵2 O 3 | 最大 0.10% | 最大 0.15% |
| 足球俱樂部 | 最大 0.20% | 最大 0.30% |
| 意向書 | 最大 0.05% | 最大 0.09% |
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99%碳化矽綠碳化矽砂F70產品特點
- Extremely high hardness (Mohs 9.5, Vickers 3100-3400kg/mm2) with high wear-resistance ability. The hardness of SiC decrease with the increase in temperature. But still, even at the temperature of 1200°C, the hardness of green SiC is about twice that of fused alumina.
- Excellent chemical resistance and oxidation resistance. When heated at high temperatures, silicon carbide only oxidizes on the surface, forming a silicon dioxide film. The film can protect the silicon carbide material from oxidation. As a result, even at 1600°C, green SiC can maintain stability to most strong acids and alkalis.
- High Toughness. The toughness of silicon carbide abrasive refers to the difficulty of breaking under the action of external force. Taking F46 grit as an example, the toughness of carborundum tested by the static pressure method is about 68-78%. Compared with fused alumina, the mechanical strength of silicon carbide is higher. F120 for example, the compressive strength of silicon carbide is 186KN/cm2, and the compressive strength of corundum abrasive is 100KN/cm2.
- Excellent thermal shock resistance with low thermal expansion coefficient. At a temperature of 25-1400 °C, the average thermal expansion coefficient of silicon carbide is 4.4×10-6/°C, while the thermal expansion coefficient of fused alumina is 7-8×10-6/°C.
- High-temperature resistance; high-temperature strength. The melting point of green silicon carbide is 2600 °C, and the maximum operating temperature can reach 1900 °C. Applying silicon carbide to the inner wall of the engine can increase the life of the engine.
- High purity. The green silicon carbide grain from us is milling from A grade green SiC block. Then sieve to high consistency particles.
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Applications of 99% SiC green silicon carbide sand F70
GC grinding wheel for Stone F46,F60,F80,F120,F150,F180,F220 Cutting disc for marble/Glass/graphite F36,F46 Bonded Grinding Wheel F46,F60,F80,F120,F150,F180,F220 Polishing wheel, Sanding disc F80,F120,F150,F180,F220,F240,F320,F360 F400,F500,F600,F800,F1000,F1200
Honing stone, whetstone F800,F1000,F1200,F1500,F2000 Diamond sanding disc F500,F600,F800,F1000,F1200,F1500
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Specification of 99% SiC green silicon carbide sand：
| Grit | 1 | 2 | 3 | 3 and 4 | 5 | Q5max,% | ||||
| W1,um | Q1,% | W2,um | Q2max,% | W3,um | Q3min,% | W4,um | Q3+Q4min,% | W5,um | ||
| F8 | 4000 | 0 | 2800 | 20 | 2360 | 45 | 2000 | 70 | 1700 | 3 |
| F10 | 3350 | 0 | 2360 | 20 | 2000 | 45 | 1700 | 70 | 1400 | 3 |
| F12 | 2800 | 0 | 2000 | 20 | 1700 | 45 | 1400 | 70 | 1180 | 3 |
| F14 | 2360 | 0 | 1700 | 20 | 1400 | 45 | 1180 | 70 | 1000 | 3 |
| F16 | 2000 | 0 | 1400 | 20 | 1180 | 45 | 1000 | 70 | 850 | 3 |
| F20 | 1700 | 0 | 1180 | 20 | 1000 | 45 | 850 | 65 | 710 | 3 |
| F24 | 1180 | 0 | 850 | 25 | 710 | 45 | 600 | 65 | 500 | 3 |
| F30 | 1000 | 0 | 710 | 25 | 600 | 45 | 500 | 65 | 425 | 3 |
| F36 | 850 | 0 | 600 | 25 | 500 | 45 | 425 | 65 | 355 | 3 |
| F40 | 710 | 0 | 500 | 30 | 425 | 40 | 355 | 65 | 300 | 3 |
| F46 | 600 | 0 | 425 | 30 | 355 | 40 | 300 | 65 | 250 | 3 |
| F54 | 500 | 0 | 355 | 30 | 300 | 40 | 250 | 65 | 212 | 3 |
| F60 | 425 | 0 | 300 | 30 | 250 | 40 | 212 | 65 | 180 | 3 |
| F70 | 355 | 0 | 250 | 25 | 212 | 40 | 180 | 65 | 150 | 3 |
| F80 | 300 | 0 | 212 | 25 | 180 | 40 | 150 | 65 | 125 | 3 |
| F90 | 250 | 0 | 180 | 20 | 150 | 40 | 125 | 65 | 106 | 3 |
| F100 | 212 | 0 | 150 | 20 | 125 | 40 | 106 | 65 | 90 | 3 |
| F120 | 180 | 0 | 125 | 20 | 106 | 40 | 90 | 65 | 75 | 3 |
| F150 | 150 | 0 | 106 | 15 | 90 | 40 | 75 | 65 | 63 | 3 |
| F180 | 125 | 0 | 90 | 15 | 75 | * | 63 | 40 | 53 | * |
| F220 | 106 | 0 | 75 | 15 | 63 | * | 53 | 40 | 45 | * |
| FEPA Grit | ds50-value (μm) |
| F 230 | 53.0 ± 3 |
| F 240 | 44.5 ± 2 |
| F 280 | 36.5 ± 1.5 |
| F 320 | 29.2 ± 1.5 |
| F 360 | 22.8 ± 1.5 |
| F 400 | 17.3 ± 1 |
| F 500 | 12.8 ± 1 |
| F 600 | 9.3 ± 1 |
| F 800 | 6.5 ± 1 |
| F 1000 | 4.5 ± 0.8 |
| F 1200 | 3.0 ± 0.5 |
| F 1500 | 2.0 ± 0.4 |
| F 2000 | 1.2 ± 0.3 |
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Production details of 99% SiC green silicon carbide sand：
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Packing:
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FAQ
Q: What is the difference between green silicon carbide and black silicon carbide?
A: First of all, Green silicon carbide has a higher purity of SiC(99%), black silicon carbide SiC purity is min 98%. Secondly, green silicon carbide is harder than black silicon carbide.
Q: Is the green silicon carbide powder from you by airflow sieving or water sieving?
A: Our green silicon carbide powder is made by the water sieving process. So the particles are of high consistency.
Q: What are the HS code and CAS NO. of silicon carbide?
A: HS code is 2849200000. CAS NO. is 409-21-2.
Q: Is there any restriction to export silicon carbide material from China?
A: Yes, it has to get an export license to export. We will provide it to customs.
Q: How many kgs of free samples can we get?
A: 我們提供小於 1 公斤的免費樣品。客戶需承擔快遞費用和DGM證書費用。
問：您如何在交貨前檢查產品？
A: 我們會在發貨前檢查化學、密度、粒度分佈和包裝項目。交貨後，我們將每批樣品保存 3 個月。
問：您要求起訂量嗎？
A: MOQ 是 1 袋，總是 25 公斤。運輸成本將高於1MT。
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