@misc{eprints32045,
           month = {Juni},
           title = {SINTESIS DAN KARAKTERISASI KALSIUM SILIKAT 
BERBAHAN DASAR CANGKANG KERANG DARAH 
PADA SUHU KALSINASI 1000 oC},
          author = {1317041012 Elisa Puspita},
         address = {UNIVERSITAS LAMPUNG},
       publisher = {FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM},
            year = {2018},
             url = {http://digilib.unila.ac.id/32045/},
        abstract = {Penelitian ini bertujuan untuk mensintesis kalsium silikat berbahan dasar kalsium karbonat dari cangkang kerang darah (Anadara granosa) dan CaCO3 komersil sebagai kontrol, serta sekam padi sebagai sumber silika yang dikalsinasi pada suhu 1000 oC menggunakan metode reaksi padatan. Sampel yang diperoleh dikarakterisasi menggunakan Differential Thermal Analysis-Thermogravimetric Analysis (DTA-TGA), X-Ray Diffraction (XRD), Scanning Electron          Microscopy-Energy Dispersive X-ray (SEM-EDX), dan Fourier Transform        Infra-Red (FTIR). Hasil karakterisasi DTA-TGA menunjukkan kalsium silikat mengalami penyusutan massa dikarenakan proses dekomposisi CaCO3 menjadi CaO, dimana kalsium silikat cangkang kerang darah sebesar 27,52 \% dan kalsium silikat CaCO3 komersil sebesar 28, 03 \%. Hasil karakterisasi XRD menunjukkan bahwa terbentuk fasa {\ensuremath{\beta}}-CaSiO3 dan {\ensuremath{\alpha}}-CaSiO3, dimana fasa mayor merupakan fasa {\ensuremath{\beta}}-CaSiO3. Hasil karakterisasi SEM menunjukkan bahwa partikel berbentuk spheroid (bulat) dan permukaan mulai menggumpal (beragglomerasi), dengan ukuran rata-rata kalsium silikat cangkang kerang darah sebesar 0,287 {\ensuremath{\mu}}m dan kalsium silikat CaCO3 komersil sebesar 0,297 {\ensuremath{\mu}}m. Hasil karakterisasi EDX menunjukkan adanya kandungan unsur-unsur Ca, Si, O, C, dan K. Gugus fungsi yang terbentuk pada FTIR menunjukkan adanya vibrasi Si-O, ikatan Si-O-Si, vibrasi Si-O-Ca, vibrasi O-Si-O, vibrasi CO32-, dan absorpsi O-H.

Kata kunci: Kalsium silikat, {\ensuremath{\beta}}-CaSiO3, cangkang kerang darah (Anadara granosa), silika sekam padi, kalsinasi.




ABSTRACT


The objective of this research is to synthesize of calcium silicate based calcium carbonate from blood cockle shells (Anadara granosa) and CaCO3 commercial as control, along with rice husk as silica by using solid state method and calcined at 1000 oC. The samples obtained were characterized using Differential Thermal                   Analysis-Thermogravimetric Analysis (DTA-TGA), X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX), and Fourier Transform Infra-Red (FTIR). The DTA-TGA result showed that calcium silicate occurs mass shrinkage caused by decomposition CaCO3 to CaO, which blood cockle shells calcium silicate is 27,52 \% and CaCO3 commercial calcium silicate is 28,03\%. XRD result showed that formed {\ensuremath{\beta}}-CaSiO3 and {\ensuremath{\alpha}}-CaSiO3 phase, which {\ensuremath{\beta}}-CaSiO3 phase is major phase. SEM result showed that samples have a spheroid particles and surfaces begin to agglomerated, which an average particles size of blood cockle shells calcium silicate is 0,287 {\ensuremath{\mu}}m and CaCO3 commercial calcium silicate is 0,297 {\ensuremath{\mu}}m. EDX result showed that sample contained Ca, Si, O, C, and K. The functional groups presence in the FTIR result showed that vibration of Si-O, Si-O-Si bonding, vibration of Si-O-Ca, vibration of O-Si-O, vibration of CO32, and absorption O-H.

Keywords: Calsium silicate, {\ensuremath{\beta}}-CaSiO3, blood cockle shells (Anadara granosa), rice husk silica, calcination.}
}