product description: Material:malachite stone Jewelry kind: Necklace, bracelet, earring, finger ring, pendant, etc. Color: as picture Beads diameter (mm):6~16 Logo:oem is available Design:refer picture, also can customized Hs code:7116200000 Moq:small order quantity and samples order accept Packing:standard export bag and carton, or as customers request Payment :western union, t/t, Paypal, etc. Delivery time: 3-7days Delivery method: by air, by dhl, ems, ups, tnt, fedex. Or by sea as per order quantity. Our advantages: 1. Rich and famous resource, in huangshi city daye 2. High quality low price, large stock 3. Exquisite design 4. Low moq & mixed orders 5. Prompt delivery 5. Excellent after-sale service
Property: density:6.1-6.5g/cm3 ZrO2 content: 65% min HfO2 content: 95% max Fe2O3 content: 0.3% max
Wollastonite is a naturally occurring mineral with many unique characteristics. Through advanced processing, it has become one of the most versatile functional fillers in the marketplace. Wollastonite increases the performance of many products including plastics, paints and coatings, construction materials, friction, ceramic and metallurgical applications to name a few. Wollastonite is an industrial mineral comprised chemically of calcium, silicon and oxygen. Its molecular formula is casio3 and its theoretical composition consists of 48% cao and 51% sio2. Natural wollastonite may contain trace or minor amounts of various metal ions such as aluminum, iron, magnesium, potassium and sodium. Wollastonite is rarely found by itself and generally contains other minerals like calcite, garnet and diopside that are removed during processing. Optimum performance is created by properly matching the correct coupling agent at the right concentration level to the polymer system. Overall, the benefits of a surface modified wollastonite are improved physical properties, improved processing along with improved dispersion of the resin.
Chromite is lack or brown, The main ingredient of chromite FeOr2O3. It is shaft and granular crystal system. The hardness is 5.5 and density is 4.3 g/cm3. Because melting point of chrome oxide is 1900?,so can adjust high-temperature friction coefficient or decrease high temperature heat recession , clean the friction couple in the high temperature to increase the efficiency of the brake. Chromite can applied in brake pad drum brake or clutch.The recommended regular consumption is 2?8% density: 4.3-4.6/cm3 chrome oxide content: =30% screen analysis: +S 200
In the industrial application, chromite belongs to the spinel, general chemical formula is FeOr2O3. With heat resistance and corrosion resistance and other properties In the metallurgical industry, chrome ore is mainly used for smelting ferrochrome and chromite metal.Chromite is the important iron-resistance minerals, it has a strong metal slag erosion resistance. Chromite not only have low thermal expansion rate,also have thermal shock resistance, and the chilling resistance is better than zircon. So Applied in brake pads, chromite can adjust the temperature coefficient of friction and reduce the heat recession, increase the efficiency of the brake,and it has the irreplaceable effect. Function: density: 4.3-4.6/cm3 chrome oxide content: =30% screen analysis: +S 200
The character of antimony sulfide: The melting point of antimony sulphide is 548 centigrade, it is of soft metal sulfide with low melting point. It would forms inorganic binder and have the smiliar sintering effect with sintering ceramic in at high temperature.When add with antimony sulfide, it can reduce the dosage of organic binder.As a result, the resin dosage in brke pad is only 7%-8% or even lower like 5% to 6% because add the antimony sulphide. Using antimony sulfide is good for reducing the heat recession of friction coefficient, and for reducing the high temperature wear. Antimony sulfide hardness is low, can reduce the brake noise of brake pads Property: Density: 6.6g/cm3 Antimony sulfide content: 90% Grade:200mesh, 325mesh
Product description: Lead zinc ore is gray and black powder, and is made by selected and crushed sphalerite and galena sulfide ore.The mohs hardness is 3-5.5, the density is 4.5- 5.0 g/cm3.For the different melting point of sulfide, lead zinc ore is used in friction material for adjusting high-temperature, improving friction coefficient and reducing the dosage of adhesive.It is specially suitable for rake pad drum brake or clutch.The recommended regular consumption rate is about 2-8% according to the required function.
Product introduction: chalcocite is lightgray powder,it is made by selected and crushed chalcocite ore, the main ingredients is cuprous sulfide. The density is 8.3-8.9g/cm3, the hardness is 3 ,the melting point is 1030 centigrade and the boiling point is 2310 centigrade. Chalcocite used for friction materials to adjust the high temperature friction properties and wear resistance, it suitable for disc brake pads and drum brake pads. According to the requirements of the performance,the recommended regular consumption is between 2% and 8%. Property: density: 5.4-5.8g/cm3 copper content:18%-20% moisture:2%max screen analysis: +S 100 0 -S 180 90%max grade:200mesh,325mesh sieving rate: 97%
Product description, Product introduction: Diatomite is a kind of biogenic silicastone, It is mainly composed of the remains of ancient diatom. Diatomite mineral contains opal, and mixed with the monomer of quartz grain impurities, the color can be white, yellow , green etc.. Diatomite is a kind of friction materials,it can improve the process performance of friction material, and can make the products have stable friction performance, prolong the service life, reduce the cost. Diatomite can be applied in Brake pad Drum brake or clutch. According to the performance requirement,The recommended regular consumption of Diatomite is from 2% to 8%. The character of Diatomite: The main chemical composition of Diatomite is SiO2,The  chemical formula is SiO2NH2O,and the mineral composition are opal and its variants. Except SiO2, Diatomite also contains a small amount of impurities such as Fe, A1, Ca, Mg, K, Na etc.. Diatomite often accompanied by various kinds of clay, quartz and dolomite, etc.. Property: Si02: 75% min A1203: 4% max Fe: 0.05% max L.O.I: 6% max
