Toothpaste Abrasiveness Ranked by RDA (Relative …
Resultinclude calcium carbonate, dehydrated silica gels, hydrated aluminum oxides, magnesium carbonate, phosphate ... (but also in the literature known as radioactive dentin abrasion.) These are RDA values for common toothpaste: 0-70= low abrasive, 70-100= medium abrasive, 100-150= highly abrasive, 150-250= regarded …
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Toothpaste Abrasion and Abrasive Particle Content: …
ResultFour toothpaste formulations with different contents of abrasive hydrated silica particles (2.5, 5.0, 7.5 and 10.0 wt%) were prepared (see Table 1 …
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Compare and Understand Rod/Ball/Impact …
ResultThe three tests are: The Bond ball mill work index (Wi BM, or BWi) conducted from a feed size of approximately 2 mm to a product size on the order of 100 µm. The Bond rod mill work …
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A comparative study for the main properties of silica and …
ResultThe two types of silica that can be used in different industrial applications are natural and synthetic silica. The latter one, which is either precipitated or fumed silica, is currently used in elastomer technology depending on their method of manufacture. 6 Specific performance properties, such as reduced …
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PORE STRUCTURAL AND FRACTAL ANALYSIS OF THE …
Resulttance, such as the addition of silica fume.6,9,11,13 Silica fume, a by-product from the manufac-ture of ferrosilicon and silicon metal, is a highly pozzolanic material consists mainly of submicron spherical particles of silicon dioxides.14,15 Gener-ally, the compressive strength and abrasion resis-tance of concrete increase with the …
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Friction, Abrasion and Crack Growth Behavior of In-Situ and …
ResultThe article focuses on comparing the friction, abrasion, and crack growth behavior of two different kinds of silica-filled tire tread compounds loaded …
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Abrasiveness evaluation of silica and calcium …
ResultThe amount and pattern of dentin abrasion may be closely related to factors such as the type, content, characteristics (e.g., size, shape, hardness, and homogeneity) of the abrasive, …
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A comparative study for the main properties of …
ResultAs a better reinforcement material, silica has a stronger interfacial relationship with the SBR matrix and the reduction of abrasion loss in the SBR composites was clearly evident. The …
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Effects of silica fume on the abrasion resistance of low-heat …
ResultIn this work, the effects of silica fume type (Si-Ⅰ, Si-Ⅱ) and silica fume content (0%, 3%, and 5%) on the abrasion resistance and other mechanical properties of LHP cement concrete were studied using rotating jet method, and the correlation between the abrasion resistance and other mechanical properties was …
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Abrasive Size
ResultCoated abrasives are described in terms of shape and size, abrasive type, grain size (mesh size for conventional abrasives and generally grain size in micrometers for …
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Abrasion Resistance of Concrete Containing Polyolefin Fibers and Silica …
ResultIn this work, the effects of silica fume type (Si-Ⅰ, Si-Ⅱ) and silica fume content (0%, 3%, and 5%) on the abrasion resistance and other mechanical properties of LHP cement concrete were ...
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A Review of Additives and their Effects on the
ResultThe addition of PDMS to the silica sols improved the hydrophobicity and abrasion-resistance of the coating, and prevented to some extent the coating from cracking which occurred in a pure ...
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Sol–gel derived near-UV and visible antireflection coatings …
ResultThis paper reports a facile means to gradually tailor refractive index from an ultra-low-n of 1.10–1.45 based on hollow silica nanospheres hybridized with acid-catalyzed silica. The influences of the hybridization on refractive index, thin-film uniformity, and roughness were systematically investigated. The single-layered …
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Determination of Abrasiveness in Copper-Gold Sulfide …
Resultthe Bond [1] test method, the preferred alternative among the various abrasion tests avail-able [2,4–7,11]. The outcome of this test is the Bond …
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Statistical Analysis, Modeling and Optimiziton of Silica, …
ResultA Box-Behnken response surface approach has been made to study the possibility of decrease of natural rubber/butadiene rubber ratio in truck tire tread compound with the assistance of silica/silane reinforcement filler. A mathematical modeling has been carried out to investigate the dependency of tear resistance, …
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AGREEMENT BETWEEN FRICTION, ABRASION, AND ROLLING RESISTANCE IN SILICA
ResultABSTRACT. Development of green tires by using silica and silane in tread compounds has emerged as a key technology in the tire industry. One of the most important features of a green tire is its low rolling resistance; however, agreement between other performances of a tire, such as wet grip and wear, …
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Sol-gel preparation of antireflective coatings with abrasion resistance
ResultIt is a common way to adjust the mechanical and optical properties of the ARCs by mixing base-catalyzed silica sol and acid-catalyzed silica sol together, which named base/acid two-step catalysis (Cai et al., 2014). The abrasion resistance would be optimized by increasing acid-catalyzed sol content.
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Compounding Precipitated Silica in Elastomers
ResultThis valuable guide to compounding elastomers with precipitated silica covers principles, properties, mixing, testing and formulations from a practical perspective. This handbook and reference manual will serve those who work on part design, elastomer formulation, manufacturing and applications of elastomers. …
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In-Situ and Ex-Situ Silica Filled Rubber Composites
Resultof sol-gel silica inside the rubber could be found in our earlier work [21]. The volume fraction of silica in both nanocomposites is the same and is confirmed through thermogravimetric analysis [21].
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Improvement of mechanical and dynamic properties of high …
ResultIt was found that the tensile and tear properties, as well as abrasion resistance of the silica filled epoxide functionalized natural rubber vulcanizates …
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A Study on High Performance Fine-Grained Concrete
ResultIt has a very high silica content similar to that of silica fume (SF). Using less-expensive and locally available RHA as a mineral admixture in concrete brings ample benefits to the costs, the technical properties of concrete as well as to the environment. ... The abrasion index (g/mm 2) is calculated by dividing the …
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abrasion index and silica content
ResultAR silica coatings exhibiting more than 6% increase in transmittance in the near UV/visible spectral range can be obtained at an optimized refractive index, thickness, and surface roughness. The abrasion test showed that the silica coatings exhibited sufficient structural durability due to continuous silica nanostructures and low …
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Abrasion Index And Silica Content
ResultSilica Content and Structure from Corncob Ash Gladys Ayu Paramita Kusumah Wardhani, 175 content in corncob powder, it was burned at high temperature 750ºC for 5 hours. The corncob ash was measured by Energy Dispersive Xray fluorescence spectroscopy (EDXRF) to analyze the content of silica and metallic oxide …
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Effect of silica fume content on compressive …
ResultThe silica fume plays a positive rule on growth of compressive strength, splitting strength and abrasion resistance of cement-based composites due to the pozzolanic and filler effect.
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Improvement of mechanical and dynamic properties of high silica …
ResultMoreover, the silica filled epoxide functionalized natural rubber having 14 mol% epoxide content without a silane coupling agent exhibited low abrasion loss, low heat build-up and enhancement in loss tangent at 0 °C, hence improved wet skid resistance, compared to the silica filled natural rubber without a silane …
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Abrasion erosion characteristics of concrete made with
ResultFor instance, Liu carried out an experiment to investigate the effect of silica fume on the abrasion resistance of hydraulic concrete containing surface cracks [1]. The test results indicated that the abrasion rate of concretes with 5% and 10% silica fume, prepared at water to cementitious materials ratio of 0.38 and …
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An Abrasion-Resistant and Broadband Antireflective Silica …
ResultA double-layer broadband antireflective (AR) coating was prepared on glass substrate via sol–gel process using two kinds of acid-catalyzed TEOS-derived silica sols. The relative dense layer with a porosity of ∼10% was obtained from an as-prepared sol, while the porous layer with a porosity of ∼55% was from a modified …
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The correlation of tear deviation and resistance with the …
Result1. Introduction. Widespread use of carbon black in rubber was first initiated by the discovery that the abrasion resistance and the toughness of gum rubbers can be significantly improved upon the introduction of carbon black [1].Similarly, silica has long been a vital component of the tread for off-road tires …
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Embedding constructed refractive index graded antireflective coating
ResultThe slight decline of the average transmittance from 98.5% to 98.4% is caused by the very small increase in the refractive index of the silica coating that happened during the surface treatments schematically shown in Fig. 5 (b) [23]. The inset photo in Fig. 5 (a) gives a visual comparation of the bare PC substrate and …
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Toothpastes | American Dental Association
Result,p>The U.S. Food and Drug Administration (FDA) monograph on over-the counter anticaries agents 1 provides a definition of toothpaste or "dentifrice," as "An abrasive-containing dosage form (gel, paste, or powder) for delivering an anticaries drug to the teeth." An anticaries drug is defined as "A drug that aids in …
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