Announcement
Starting on July 4, 2018 the Indonesian Publication Index (IPI) has been acquired by the Ministry of Research Technology and Higher Education (RISTEKDIKTI) called GARUDA Garba Rujukan Digital (http://garuda.ristekdikti.go.id)
For further information email to portalgaruda@gmail.com

Thank you
Logo IPI  
Journal > JURNAL FISIKA Himpunan Fisika Indonesia > EFFECT OF B2O3 ADDITIVE TO CERAMIC PROCESS SINTERING ON STEATITE AND ITS CRYSTAL STRUCTURE

 

JURNAL FISIKA Himpunan Fisika Indonesia
Vol 8, No 2 (2008)
EFFECT OF B2O3 ADDITIVE TO CERAMIC PROCESS SINTERING ON STEATITE AND ITS CRYSTAL STRUCTURE
Muljadi, Muljadi ( Pusat Penelitian Fisika-LIPI, Kawasan Puspiptek Serpong, Tangerang 15314)
Tetuko, Anggito Pringgo ( Pusat Penelitian Fisika-LIPI, Kawasan Puspiptek Serpong, Tangerang 15314)
Khaerudini, Deni Shidqi ( Pusat Penelitian Fisika-LIPI, Kawasan Puspiptek Serpong, Tangerang 15314)
Sebayang, Perdamean ( Pusat Penelitian Fisika-LIPI, Kawasan Puspiptek Serpong, Tangerang 15314)
Article Info   ABSTRACT
Published date:
24 Jul 2013
 
Steatite (MgSiO3) has the polymorph characteristic with crystal types: protoenstatite, orthoenstatite, and clinoenstatite. It is used for electrical component, such as: high temperature electric isolators (halogen lamp, spark plug, and electrics stove). Steatite is made from (3MgO.4SiO2.H2O) powder and flux materials (BaCO3) with composition: 84 wt% talc, 8 wt% clay and 8 wt% BaCO3.; additive variations: 0, 0.3, 0.9 and 1.2 %wt B2O3. The sample preparation are conducted by solid-solidmixing (material are mixed and milled using ball mill for 24 hours). Then it dried in drying oven (100oC) for 12 hours to obtain dry powder. Powder is formed into pellet using hydraulic press (50 MPa). Pellet was sintered using electrics furnace with variation: 1000, 1050, 1100, 1150, and 1200oC (holding time for 2 hours) and the heating rate is 10oC/minute. Then, each sample is characterized on its bulk density, linear shrinkage, and phase identification using X-Ray Diffraction (XRD). Thecharacterization results show that the additions of B2O3 give the significant influence to sintering process. The addition of above 0.3 % B2O3 gives result: bulk density from 2.15 - 2.7 g/cm3 and linear shrinkage from 0.2 - 0.4 %. The XRD curves show that the optimum additive of 0.9 % B2O3 has thedominant phase protoenstatite and minor phase barium alumina silicate.Steatite (magnesium silikat) memiliki karakteristik polymorph dengan bentuk kristal: protoenstatite, orthoenstatite, dan clinoenstatite dengan rumus kimia MgSiO3. Steatite biasanyadigunakan sebagai komponen elektronik, seperti: isolator elektrik temperatur tinggi (lampu halogen, busi, dan kompor listrik). Steatite dibuat dari sebuk (3MgO.4SiO2.H2O) dan materials flux (BaCO3), dengan komposisi: 84 wt% talc, 8 wt% clay dan 8 wt% BaCO3; variasi aditif: 0, 0.3, 0.9 dan 1.2 % wt B2O3. Preparasi sampel dilakukan dengan solid-solid mixing (material dicampur dan dihaluskan menggunakan ball mill selama 24 jam), lalu dikeringkan dalam oven pengering (100oC) selama 12 jam sehingga diperoleh bentuk serbuk. Serbuk dicetak dengan menggunakan hydraulic press (50 MPa) dan menghasilkan pellet, kemudian disinter  menggunakan electrics furnace dengan variasi suhu: 1000, 1050, 1100, 1150, dan 1200oC (holding time selama 2 jam), serta heating rate sebesar10oC/menit. Karakterisasi meliputi: densitas, linear shrinkage, dan identifikasi fasa menggunakan X-Ray Diffraction (XRD). Hasil karakterisasi memperlihatkan bahwa, penambahan B2O3 memberikan pengaruh yang signifikan terhadap proses sintering. Penambahan diatas 0.3 % B2O3 menghasilkan densitas 2.15 - 2.7 g/cm3 dan linear shrinkage dari 0.2 - 0.4 %. Analisa XRD menunjukkan penambahan aditif yang optimal sebesar 0.9 % B2O3 dengan fasa dominan, protoenstatite dan fasa minor barium alumina silicate.
Copyrights © 2013