Preparation Conditions for Aragonite Whiskers by Carbonation Process

Ota, Yoshio; Inui, Saburo; Iwashita, Tetsushi; Kasuga, Toshihiro; Abe, Yoshihiro

doi:10.2109/jcersj.104.196

Cited by 20 publications

(7 citation statements)

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“…In previous work we synthesized needle-like aragonite using sparingly dissoluble salt as a reactant Deng, 2003, 2004). Ota et al (1995Ota et al ( , 1996 synthesized aragonite whisker with Ca(OH) 2 and CO 2 in the presence of MgCl 2 . After that He et al (2000) synthesized needle-like aragonite and investigated its performance as a filler of PVC composite.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of needle-like aragonite from limestone in the presence of magnesium chloride

Shao

Cai

et al. 2009

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 99%

Synthesis of needle-like aragonite from limestone in the presence of magnesium chloride

Shao

Cai

et al. 2009

Journal of Materials Processing Technology

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“…The cement used was produced by Dalian cement factory, with a specifi c surface area of 348.1 m 2 /kg. The CaCO 3 whiskers were synthesised by a simple carbonation method using calcium chloride as a precursor [12] . Briefl y, the calcium chloride was prepared by mixing magnesium chloride solution with certain concentration and calcium hydroxide prepared by lime slaking.…”

Section: Raw Materialsmentioning

confidence: 99%

Serviceability and reinforcement of low content whisker in portland cement

Cao

Wei

Wang

2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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In order to explore the serviceability and reinforcement of CaCO 3 whisker in portland cement matrix, the durability of CaCO 3 whisker and effect of low whisker content(0%-4.0%) on the working performance and mechanical properties of portland cement were investigated. The experimental results show that CaCO 3 whiskers have a good stability and serviceability in cement, and should not signifi cantly alter the rheological properties of the cement paste. The fl exural and compressive strength of portland cement reinforced by CaCO 3 whiskers was increased by 33.3% and 12.83%, respectively.

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“…Too high supersaturation almost always results in calcite. Recently some simple techniques for the preparation of needle-like aragonite or aragonite whiskers have been developed [18][19][20][21][22][23][24]. In our previous study [25], sparingly dissoluble calcium salts were used as reactants to control the supersaturation degree and calcium carbonates with different polymorphisms were synthesized.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we directly synthesized aragonite needle using Ca(OH) 2 and CO 2 in the presence of MgCl 2 . Although a similar method for synthesis of aragonite has been reported in the literature [22][23][24], the effect of MgCl 2 on the polymorphisms has not been studied in detail. As filler of paper making the effects of needle-like aragonite on paper properties were also investigated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Needle-Like Aragonite Crystals in the Presence of Magnesium Chloride and Their Application in Papermaking

Shao

et al. 2009

Advanced Composite Materials

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PCC (precipitated calcium carbonate) and ground calcium carbonate have been widely used in alkaline papermaking. Unfortunately, although increasing filler level in papers can improve the paper properties such as brightness, opacity, stiffness gloss, smoothness, porosity, and printability, as well as decrease cost, some strength of the paper is negatively affected. In this research, needle-like aragonite was synthesized using Ca(OH) 2 and CO 2 as reactants in the presence of MgCl 2 and characterized with scanning electronic microscopy (SEM) and X-ray diffraction (XRD). The physical and optical properties of the paper handsheets containing these needle-like aragonite fillers were evaluated. Results indicated that tensile strength, Z-direction tensile strength and folding endurance of the paper were improved by the needle-like aragonite crystals compared to the paper using commercial PCC (precipitated calcium carbonate) as filler. The stiffness of the paper handsheet on the machine direction was increased, but no evident difference in the cross direction was found. The improvement of paper strength mainly resulted from the twining effect between the aragonite whiskers and paper fibers. The optical properties of the paper were slightly decreased with the use of the needle-like aragonites compared to commercial PCC. These results suggest that paper cost can be decreased by increasing the content of needle-like aragonite filler while paper strength will not be decreased compared to PCC filler.

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Preparation Conditions for Aragonite Whiskers by Carbonation Process

Cited by 20 publications

References 0 publications

Synthesis of needle-like aragonite from limestone in the presence of magnesium chloride

Synthesis of needle-like aragonite from limestone in the presence of magnesium chloride

Serviceability and reinforcement of low content whisker in portland cement

Synthesis of Needle-Like Aragonite Crystals in the Presence of Magnesium Chloride and Their Application in Papermaking

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