узнать больше


  • 牡蛎壳超细球霰石碳酸钙的制备与表征

    2020.3.4  开发利用牡蛎壳益受到关注。 牡蛎壳中,碳酸钙占总质量的90%~95%,钙元素含量达40%左右 [3-5] ,是一种良好的自然生物钙源。 以牡蛎壳为原料制备成各种食药级钙剂的研究受到广泛关注,已有以牡

    узнать больше
  • Biodegraded peat and ultrafine calcium carbonate result in

    2020.5.30  An organic carbon source could further be introduced into the soil to promote the growth of iron- and sulfur-reducing bacteria. In this study, acid sulfate soil

    узнать больше
  • Investigating the Impacts of Ultra-Fine Calcium

    2019.7.29  Ultra-fine calcium carbonate (UFCC) composed of a mean particle size of 3.5 μm and produced consuming less energy, was

    узнать больше
  • Morphological Investigation of Calcium Carbonate during

    Ultrafine calcium carbonate is a widely used cheap additive. The research is conducted in low degree supersaturation solution in order to study the polymorphic phases’ change

    узнать больше
  • Ultrafine calcite formed in Namsan karst cave of DPR of Korea

    2020.11.27  Calcium carbonate, CaCO 3, makes up nearly 4% of Earth’s crust as one of the most abundant materials in the world. Recently, it has been found that ultrafine

    узнать больше
  • Ultrafine calcium carbonate-filled natural rubber latex film ...

    2019.9.12  Mechanical and rheological properties of partial replacement of carbon black by treated ultrafine calcium carbonate in natural rubber compounds Article 21

    узнать больше
  • Tribological and rheological properties of the

    2023.2.14  Among the as-synthesized ultrafine calcium carbonate particle systems, oval shape particles exhibited more improvement in the anti-wear performance than rod shape particles. Preliminary experiments

    узнать больше
  • Study on the Synthesis of Ultrafine Calcium Carbonate Particles

    1994.1.1  By means of TEM and X-ray diffraction analysis, the nucleation mechanism of Ultrafine CaCO 3 particles (CaCO 3 UFPs) is studied and also the homogeneous

    узнать больше
  • 沉淀法制备多种形貌碳酸钙的研究 - 豆丁网

    2015.1.20  碳化法制得的碳酸钙称为轻质碳酸钙或沉淀碳酸钙 (简称PCC),碳化法的化学反应过程如下。. 石灰烧制:CaCO采用碳化法生产的轻钙粉体的主要特点是:粒度小,一般平均粒径在数微米以下;粒度分布窄.可视为单分散粉体:粒子晶型多样化.适用于不同行

    узнать больше
  • Calcium Carbonate Ultrafine Powder Grinding

    2020.12.24  ULTRAFINE CALCIUM CARBONATE POWDER Jan 28, 2021 SDM Strength Film - all you need to know Nov 27, 2020 Precipitated Calcium Carbonate - everything you need to know ...

    узнать больше
  • Preparation of ultrafine calcium carbonate particles with

    2007.3.20  Ultrafine particles of CaCO 3 were synthesized by dispersing the mixture of CO 2 and N 2 into the Ca(OH) ... Calcium carbonate nanoparticles and nanorods were synthesized by precipitation from saturated sodium carbonate and calcium nitrate aqueous solutions through co precipitation method. A new route of synthesis was done by using

    узнать больше
  • Materials Free Full-Text Morphological Changes of Calcium Carbonate ...

    2022.11.3  Recently, microbially induced carbonate precipitation (MICP) has shown potent potential in the field of civil engineering. The calcium carbonate crystals produced by bacteria during the MICP process play a central role in sticking the soil. However, the morphological changes of calcium carbonate crystals in this process and the mechanical

    узнать больше
  • Investigating the Impacts of Ultra-Fine Calcium Carbonate in

    2019.7.29  Ultra-fine calcium carbonate (UFCC) composed of a mean particle size of 3.5 μm and produced consuming less energy, was considered an environmentally friendly material. ... P.K. Effect of nano-silica and ultrafine fly ash on compressive strength of high volume fly ash mortar. Appl. Mech. Mater. 2013, 368–370, 1061–1065. [Google Scholar]

    узнать больше
  • Calcium recovery from waste carbide slag via ammonium

    2022.12.1  The product of insoluble calcium sulfate dihydrate (CaSO 4 2H 2 O) was the important raw material for the preparation of ultrafine calcium carbonate had attracted much attraction (B. B. Wang et al., 2021). Considering the low energy consumption and recycling economy, ...

    узнать больше
  • 牡蛎壳超细球霰石碳酸钙的制备与表征

    2020.3.4  ABSTRACT The active calcium was extracted from pulverized oyster shells by lactic acid prepared as ultrafine calcium carbonate by carbonization method under the regulation of trypsin. The features of ultrafine calcium carbonate were characterized by scanning electron microscopy (SEM) and infrared spectroscopy (IR).

    узнать больше
  • Socal® U1S2 - Imerys: Technical Datasheet - SpecialChem

    2023.11.15  Socal® U1S2 by Imerys is an ultrafine, white and odorless coated precipitated calcium carbonate grade. It possesses a very high fineness, roundeal regular crystals and an organic surface treatment. It is used in sealants and adhesives based on polysulfide, polyurethane and silicon. Socal® U1S2 provides rheological control and

    узнать больше
  • Synthesis and application of a polyacrylate dispersant on the ...

    2014.11.1  In general, ultrafine ground calcium is obtained by the process of ultrafine wet grinding, and good dispersants should be added to obtain high quality ultrafine ground calcium carbonate. Small quantities of dispersants can remarkably improve the grinding efficiency, and have been widely used in ultrafine wet grinding processes.

    узнать больше
  • CALCIUM CARBONATE (GCC) - Hosokawa Alpine

    2020.6.23  The production of calcium carbonate fillers (GCC) from chalk, limestone or marble is challenging today. GCC stands for dry powder or a suspension and is indispensable in today's industry. It is found in breathable film for baby nappies, building material, paint and in almost all polymers. The quality requirements of the industry.

    узнать больше
  • Synthesis of dispersed CaCO3 nanoparticles by the ultrafine

    2009.3.1  The ultrafine grinding of calcium carbonate was performed to synthesize GCC nanoparticles using the beads mill. Calcium carbonate was easily agglomerated in the absence of the surfactant after it was grinded even at the optimum condition: the slurry concentration of 5 wt.%, the bead size of 300 μm, and the rotor speed of 3315 rpm. The ...

    узнать больше
  • Omya develops calcium carbonate material as

    2022.12.21  The product comprises of ultrafine calcium carbonate Omyaloop MIX, specifically developed to compatibilize polyethylene (PE) and polypropylene (PP) in mechanical recycling. Available in the most

    узнать больше
  • Utilization of distiller waste and residual mother liquor to

    2007.10.1  The process of calcium carbonate precipitation is based on calcium ions contained in distiller waste liquid and carbonate ions contained in residual mother liquor. (NH 4) 2 CO 3 + CaCl 2 → CaCO 3 ↓ + 2NH 4 Cl. Results of research have shown that the production of spherical ultrafine calcium carbonate based on soda ash waste materials is ...

    узнать больше
  • Journal of Applied Polymer Science Wiley Online Library

    2002.12.3  Using ultrafine calcium carbonate to reinforce natural rubber latex film, the effect of its content on latex properties such as surface tension, viscosity, mechanical stability, and heat stability and the physical properties of latex film before and after aging such as tear strength, modulus, and tensile strength were investigated.

    узнать больше
  • Enhancing performance and sustainability of ultra-high

    2023.6.5  Ultra-high-performance concrete (UHPC) exhibits high compressive strength and good durability. However, owing to the dense microstructure of UHPC, carbonation curing cannot be performed to capture and sequester carbon dioxide (CO2). In this study, CO2 was added to UHPC indirectly. Gaseous CO2 was first converted into solid calcium

    узнать больше
  • Preparation of Ultrafine Calcium Carbonate Particles With Micropore ...

    2007.3.1  Ultrafine particles of CaCO3 were synthesized by dispersing the mixture of CO2 and N2 into the Ca (OH)2/H2O slurry with a micropore-plate. Because the micropore is micrometers scale, process of ...

    узнать больше
  • 浙江钦堂钙业股份有限公司_calcium carbonate_Mining

    2018.7.2  It is a large-scale heavy calcium carbonate production enterprise in East China that integrates mining, mineral powder processing, and new material research and production. It has a green mine with a mining area of 0.5 square kilometers and abundant reserves to be mined. The plant covers an area of 125000 square meters, with a building

    узнать больше
  • Calcium carbonate nano- and microparticles: synthesis

    2021.10.7  Calcium carbonate micro- and nanoparticles are considered as chemically inert materials. Therefore, they are widely considered in the field of biosensing, drug delivery, and as filler material in plastic, paper, paint, sealant, and adhesive industries. The unusual properties of calcium carbonate-based nanomaterials, such as biocompatibility,

    узнать больше
  • Betocarb UF - Omya

    2021.5.12  ultrafine Calcium Carbonate particle allow a high compatibility and synergy with chemicals. Our Calcium Carbonate furthermore increases the brightness and whiteness. Betocarb UF d50% 5 m2/g Total Calcium Carbonate content > 98% Betocarb UF is acting as fine packing agent and a mineral accelerator

    узнать больше
  • (PDF) Enhancing the Microstructure and Sustainability of

    2021.4.1  Specifically, a mixture of high-volume fly ash (FA) and ultrafine calcium carbonate (UFCC) is investigated as a partial substitution of cement. For optimizing the concrete’s performance, various ...

    узнать больше
  • The preparation of calcium carbonate with different

    2020.3.5  The hydrophilic property of calcium carbonate is one of the biggest problems that calcium carbonate is difficult to disperse in polymer matrix, making it difficult to be widely used. The surface modification of calcium carbonate by hydrophobic material will expand the application range of calcium carbonate, and the surface modification of ...

    узнать больше
  • Ultrafine calcite formed in Namsan karst cave of DPR of Korea

    2020.11.27  Calcium carbonate, CaCO 3, makes up nearly 4% of Earth’s crust as one of the most abundant materials in the world. Recently, it has been found that ultrafine calcium carbonate generally has much more advantages than ordinary calcium carbonate. The new properties of UFC have attracted much research interest.

    узнать больше
  • Flame retardancy and smoke suppression of silicone foams

    2023.1.10  Effects of platinum compounds/superfine aluminum hydroxide/ultrafine calcium carbonate on the flame retardation and smoke suppression of silicone foams, J Appl Polym Sci. 2020;137(1). Yan W, Yu J, Zhang MQ, Qin SH, Wang T, Huang WJ, Long LJ. Flame-retardant effect of a phenethyl-bridged DOPO derivative and layered double

    узнать больше
  • 复配型钛酸酯及其对超细碳酸钙/PP复合材料的性能影响 - nchu

    Abstract: In order to improve the dispersibility of superfine calcium carbonate in PP, titanium titanate TMC-105 and stearic acid were compounded in different proportions, and the effect of different compounding ratios on the dry modification effect of

    узнать больше
  • Preparation of precipitated calcium carbonate using

    2022.1.18  Precipitated calcium carbonate (PCC) is an important industrial filler and additive that is used in many applications, such as plastics, papers, rubbers, paints, and medicines (Jimoh et al. 2018; Ramakrishna et al. 2017).It has also recently been applied to concrete as a reinforcing agent (Li et al. 2017).The annual global production of PCC

    узнать больше
  • Study on Ultrafine Particles Used in Drilling Fluids

    common ultrafine calcium carbonate unless some polymers could be used. Titanium dioxide and zinc dioxide could be used as substitutes of calcium carbonate in drilling fluids. 1 Introduction In order to provide various essential functions of oil/gas drilling fluids, a few kinds of nano materials are applied in typical formula of drilling fluids.

    узнать больше
  • Surface modification of calcium carbonate: A review of ...

    2021.10.24  Calcium carbonate, which is widely employed as a filler added into the polymer matrix, has large numbers of applications owing to the excellent properties such as low cost, non-toxicity, high natural reserves and biocompatibility. Nevertheless, in order to obtain the good filling effect, calcium carbonate needs to be surface modified by organic

    узнать больше
  • Preparation of High-Purity Calcium Carbonate by Mineral

    2022.6.1  A new type of mineral carbonation process for concrete sludge, a waste of fresh concrete under hydration, was developed, and the carbonation performances of the process were examined by laboratory-scale experiments. The process is composed of two steps; filtration of concrete sludge and bubbling of CO2 into the filtrate to form calcium

    узнать больше
  • Eco-friendly processes for the synthesis of amorphous calcium carbonate ...

    2022.1.13  Amorphous calcium carbonate nanoparticles (ACC NPs) are promising multifunctional materials for healthcare applications. Due to their instability in aqueous media, pure ACC NPs for the biomedical field are increasingly synthesised in absolute ethanol, using the ammonia diffusion method (ADM). Although this m

    узнать больше