Synthesizing wollastonite from natural siliceous carbonate compositions

Balkevich, V. L.; Peres, Federico; Kogos, A. Yu.; Kliger, A. B.; Fishman, M. A.

doi:10.1007/bf00703982

Cited by 5 publications

(8 citation statements)

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“…Synthesized calcium silicate from the composition of natural silica with natural carbonates from quartz sand and limestone has been done by researcher [6]. The study used a solid reaction method with a calcination temperature of 1100 o C. The study results indicated that calcium silicate appears at temperatures of 850 o C and 1100 o C. While another researcher [7] conducted a study of the synthesis and characterization of calcium silicate, the results of the study showed that the microstructure of natural calcium silicate after calcination at 850 o C had different chemical phases and compositions.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Blood Cockle Shell (Anadara Granosa) Waste and Silica Sand in Manufacturing Calcium Silicate as Fillers in Paper Making Industry

Syafri¹,

Nasution²,

Manurung³

2019

Proceedings of the International Conference of CELSciTech 2019 - Science and Technology Track (ICCELST-ST 2019)

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This research aims to utilize blood cockle shell waste and silica sand as a new innovation in the manufacture of calcium silicate minerals which were used as fillers in paper making industry. In this study the manufacture of calcium silicate mineral fillers (CaSiO3) used solid state reaction technique at a temperature of 1000 o C. Some researchers have tested the use of blood cockle shells as the raw materials for making calcium silicate, so further research was needed to find out whether the calcium silicate produced can be used in paper making. Sample characterization was carried out with Fourier Transform Infrared (FTIR), Keyence microscopy and X-Ray Diffraction (XRD). The results showed that the calcium silicate phase contained the wollastonite-1A phase (CaSiO3) with the highest intensity peak at an angle of 2θ = 26.8225. FTIR analysis also showed the structure of calcium silicate with the formation of Si-O-Si and O-Si-O functional groups at a wavelength of 460 cm-1 , Si-O-Ca at a wavelength of 962 cm-1 and O-Si-O cm-1 at a wavelength of 901 cm-1. The microstructure analysis using Keyence microscope showed that the sample granules were globular in shape with a particle size of approximately 14 µm. From all the paper testing results consist of brightness, bulk density, tearing, bursting, tensile and folding endurance showed that calcium silicate filler has fulfill the TAPPI International standard.

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Section: Introductionmentioning

confidence: 99%

Utilization of Blood Cockle Shell (Anadara Granosa) Waste and Silica Sand in Manufacturing Calcium Silicate as Fillers in Paper Making Industry

Syafri¹,

Nasution²,

Manurung³

2019

Proceedings of the International Conference of CELSciTech 2019 - Science and Technology Track (ICCELST-ST 2019)

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“…3,4 2M-wollastonite, also named para-wollastonite, belongs to one of the six polytypes of b-wollastonite. [1][2][3][4][5] It has a unique structure because it has long chains of silicon tetrahedra [SiO 4 ] 42 parallel to its b axis (monoclinic structure), which results in its fibrous nature. When crushed into powder, such fibrous nature leads the formation of acicular or high aspect ratio particles, which has many useful properties, for example, low thermal expansion, low water and oil adsorption, and chemical inertness.…”

Section: Introductionmentioning

confidence: 99%

“…6 However, natural wollastonite usually occurs only in small amounts and is often contaminated by other minerals such as diopside, calcite and garnet. 1 This explains why the synthesis of wollastonite or wollastonite containing glass ceramic materials has attracted research interests over the years. 1,2,7–13…”

Section: Introductionmentioning

confidence: 99%

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Cellular growth of 2M-wollastonite in flux growth process relevant to preparation of high aspect ratio particles

Zhu

Sohn

2016

Advances in Applied Ceramics

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High aspect ratio 2M-wollastonite particles were prepared using a flux growth process, in which a unidirectional temperature gradient was established in the melt. The one-dimensional heat transfer caused the crystals to display clear cellular structure. The measured cellular growth rate decreased from ,12 to 8 mm s 21 within 20 min of crystallisation time. However, the primary arm spacing remained nearly constant at ,7.5 mm. B 2 O 3 can significantly lower the melting point of the mixture, which made the handling of the molten silicate mixtures easier. The cellular/dendritic structures were maintained up to a maximum B 2 O 3 content of 20 wt-%. The primary arm spacing increased from ,8 mm at 8 wt-% B 2 O 3 to ,40 mm at 20 wt-% B 2 O 3 . The corresponding mean aspect ratio of 2M-wollastonite particles decreased from ,12:1 (a high aspect ratio grade) at 8 wt-% B 2 O 3 to ,4:1 (a low aspect ratio grade) at 20 wt-% B 2 O 3 .

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“…This may be ascribed to the formation of glassy phase during firing these specimens. Under the action of gravitational force, 51) the formed glass or liquid phase will precipitate in the voids present through which the whole specimens result in decreasing their open porosity and correspondingly, increasing their density as well as improving their crushing strength. On the other hand, increasing the glassy phase improves the reaction processes between the various ingredients.…”

Section: Densification Parametersmentioning

confidence: 99%

Cement kiln dust–quartz derived wollastonite ceramics

Ewais

Ahmed

El‐Amir

et al. 2015

J. Ceram. Soc. Japan

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The present work aims at exploitation of CKD in presence of quartz sand by its conversion into eco-friendly wollastonite ceramics. Different batch compositions of cement kiln dust (CKD) with 30 to 55 wt % quartz with an increment of 5 wt % were designed to prepare wollastonite and its composites. The batches were designated as B 30 , B 35 , B 40 , B 45 , B 50 , B 55 where the number indicates the weight percent of quartz in the batch composition and the rest is cement kiln dust. These batches were wet mixed, dried at 100°C for 24 h, grounded, sieved, uniaxially pressed and fired at different temperatures. Phase composition, microstructure, densification parameters, and mechanical properties of the obtained fired specimens were investigated. The results showed that ¡-& ¢-wollastonite polymorphs and their composites were synthesized successfully at lower temperatures (11501250°C) without addition of any mineralizers. The output of this work might be considered as a real solution for the environmental problem relevant to cement industry.

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Synthesizing wollastonite from natural siliceous carbonate compositions

Cited by 5 publications

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Utilization of Blood Cockle Shell (Anadara Granosa) Waste and Silica Sand in Manufacturing Calcium Silicate as Fillers in Paper Making Industry

Utilization of Blood Cockle Shell (Anadara Granosa) Waste and Silica Sand in Manufacturing Calcium Silicate as Fillers in Paper Making Industry

Cellular growth of 2M-wollastonite in flux growth process relevant to preparation of high aspect ratio particles

Cement kiln dust–quartz derived wollastonite ceramics

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Synthesizing wollastonite from natural siliceous carbonate compositions

Cited by 5 publications

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Utilization of Blood Cockle Shell (Anadara Granosa) Waste and Silica Sand in Manufacturing Calcium Silicate as Fillers in Paper Making Industry

Utilization of Blood Cockle Shell (Anadara Granosa) Waste and Silica Sand in Manufacturing Calcium Silicate as Fillers in Paper Making Industry

Cellular growth of 2M-wollastonite in flux growth process relevant to preparation of high aspect ratio particles

Cement kiln dust&ndash;quartz derived wollastonite ceramics

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Cement kiln dust–quartz derived wollastonite ceramics