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Sepiolite gatti vendita sepiolite se-3 sepiolite clay for coating
Sepiolite is a kind of fibrous water-containing magnesium silicate, usually white, light gray, light yellow color, opaque and luster. Some of them are shaped like clods of earth, and some form a strange crust or tubercle. Under an electron microscope, they are made of myriads of filaments clustered together in sheets. Sepiolite has a strange property. When they encounter water, they absorb a lot of water and become soft, but when they dry, they become hard again.
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Description
Property
| Sepiolite is a kind of water-rich magnesium silicate clay mineral with layered chain structure. Rhombic or monoclinic crystalline systems, generally massive, soil – like or fibrous aggregates. Color is white, light gray, dark gray, tan, rose red, light blue green. Fresh surface for pearl luster, weathered for earth – like luster. Hardness 2~3, density 2~2.5g/cm3. With smooth and astringent feeling, sticky tongue. Brittle in dry condition. Low shrinkage, good plasticity, larger than the surface, strong adsorption. Soluble in hydrochloric acid, light weight. Sepiolite also has the properties of decolorization, heat insulation, insulation, corrosion resistance, radiation resistance and heat stability. It is mainly found in Marine sedimentary – weathering transformation type deposits. Also occurs in hydrothermal veins. | |||
| Sepiolite is a magnesium-rich silicate clay mineral. The theoretical chemical formula is Mg8[Si2O30](OH)4·12H2O. Four of the water molecules are crystalline water and the rest are zeolite water. SiO2 content is 54~60%, MgO 21~25%, and often contains a small amount of iron, manganese and other elements. There are two kinds of appearance, one is soil sepiolite, the other is fibrous sepiolite. Hardness 2~2.5, density 2.2g/cm. Dryers can float in water. Color change, generally white, light gray, common and light red, light yellow, brown and so on. | |||
| According to the morphological characteristics of its output, it can be roughly divided into earth-like sepiolite (or called sepiolite clay) and massive sepiolite. The mineral is not widely distributed in nature, often with attapulgite, montmorillonite, talc and other symbiosis. |
Introduction
| Sepiolite is a kind of fibrous magnesium-rich clay mineral (German name Meershaum, English name Spilite). Sepiolite can be divided into α sepiolite and β sepiolite according to its crystal morphology. The former is a large bundle of fibrous crystal output, so it is also called fibrous sepiolite. | |||
| Formed by sedimentation of sepiolite or by alteration of serpentine. | |||
| Sepiolite itself is non-toxic and harmless, but because sepiolite ore is altered by serpentine rock, and serpentine rock is the main component of asbestos, so it is difficult to separate sepiolite and asbestos, general sepiolite will contain a small amount of asbestos, the proportion of about 5%~30%. Sepiolite is mainly used to make pipes. China Jiangxi Leping, Hunan Liuyang and other places have output. Jiangxi Le Ping Ling is the first discovery of sepiolite in our country. Geological investigation of sepiolite clay began with Zhang Renjun. In 1947, he named “refractory white soil” sepiolite based on chemical analysis and decolorization effect, and discussed the origin of the deposit. |
Classification
| The main raw material of sepioam mud is sepioam powder, which is natural, non-toxic, tasteless, asbestos-free, non-radioactive elements of a hydrated magnesium silicate clay mineral, with non-metallic minerals in the largest specific surface area (up to 900m2/g) and unique content pore structure, is recognized as the strongest adsorption capacity of clay minerals. | |||
| Sea foam mud is a kind of natural environmental protection powder wall decoration material, is the upgrade product of diatom mud, widely used in tooling and home decoration wall decoration. |
Chemical composition
| Sepiolite belongs to rhombic system or monorhombic system. Color changeful, generally light white or gray white; Silky luster, sometimes waxy luster; Streaks are white, opaque, smooth and sticky to the touch; Mohs hardness between 2 and 2.5; The body is light, the density is 1~2.2g/cm3; Low shrinkage, good plasticity, soluble in hydrochloric acid. | |||
| The chemical composition of sepiolite is silicon (Si) and magnesium (Mg); Its standard crystal chemical formula is Mg8(H2O)4[Si6O16]2(OH)4·8H2O, in which the content of SiO2 is generally between 54~60%, and the content of MgO is mostly in the range of 21~25%. | |||
| Sepiolite has strong adsorption, decolorization and dispersion properties, but also has high thermal stability, high temperature resistance up to 1500~1700℃, modeling, insulation, salinity resistance are very good. |
Physical property
| (1). Appearance: changeable color, white, light yellow, light gray, black green, white, opaque, smooth touch and sticky tongue. | |||
| (2) .Hardness :2-2.5 | |||
| (3). Specific gravity :1-2.3 | |||
| (4) .High temperature resistance: at 350 degrees of high temperature, the structure does not change, high temperature resistance performance up to 1500-1700 degrees | |||
| (5). Absorption: absorption of water more than 150% of its own weight | |||
| According to relevant statistics, sepiolite has more than 130 kinds of uses, and has become one of the most widely used mineral raw materials in the world. | |||
Widely used
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Partial Index
| Sepiolite velvet used in friction material main technical index | |||
| 1. Fiber length :4-8mm; 2. Density :1g/cm3; 3.Sepiolite composition :>85%; 4.Moisture :<3%; 5. Settlement value :930-950 | |||
| The main technical index of sepiolite powder used in friction materials | |||
| 1.Composition of sepiolite :> 80%; 2.Particle size :200 mesh (can produce any particle size on demand) 3.Settlement value :800-850; 4.Moisture :< 1.5% |
Application progress
After purification of weathered claylike sepiolite, lithium ion or organic salt modification, can be prepared for high temperature resistant suspension agent, anti sedimentation agent, thickening thixotropic agent suitable for coating, ceramic glaze and ink. The main performance indicators are as follows:
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How to identify
The original stone is light, the powder stone is heavy
The original block stone basically has no taste, powder stone will have a glue taste
The texture of raw stone is brittle, and the texture of pink stone is fleshy
The luster of the surface of the original block stone is very natural, and the powder stone has no luster or poor luster
The original block stone has better wear resistance, while the powder stone will have white lines in the lightly scratched dark cloth or paper
Additional information
| Weight | 24 kg |
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| Dimensions | 12 × 48 × 62 cm |
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