A self-sustaining acid-base reaction in semi-aqueous media for synthesis of barium titanyl oxalate leading to BaTiO3 powders

Khollam, Y. B.; Deshpande, A.S.; Potdar, H.S.; Deshpande, S. B.; Date, S. K.; Patil, A.J.

doi:10.1016/s0167-577x(01)00642-5

Cited by 18 publications

(16 citation statements)

References 15 publications

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“…Tahap motode coprecipitation meliputi: penimbangan bahan atau material yang akan dilarutkan, homogenitasi, pengendapan larutan, pencucian larutan, pengepresan dan sintering yang melibatkan proses difusi [5].…”

Section: Pendahuluanunclassified

Pembuatan Material Ferroelektrik Barium Titanat (BaTiO3) menggunakan Metode Kopresipitasi

Safitri

Subarwanti

Supriyanto

et al. 2016

JFA

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IntisariSampel Barium titanat (BaTiO3) telah dibuat dengan metode coprecipitation. Sampel disintering pada suhu 900• C dengan variasi waktu tahan 2, 3, dan 4 jam. Uji kekristalan dilakukan dengan instrumen X-Ray Diffractometer (XRD). Nilai konstanta dielektrik diperoleh melalui pengujian dengan RCL meter. Berdasarkan analisis hasil perhitungan, parameter kisi BaTiO3 dengan waktu tahan 2 jam adalah a = b = 4,0057 nm, c = 4,0124 nm, parameter kisi untuk waktu tahan 3 jam adalah a = b = 4,0124 nm, c = 4,0532 nm dan parameter kisi untuk waktu tahan 4 jam adalah a = b = 4,0105 nm, c = 4,0642nm. Struktur krital yang didapatkan adalah tetragonal. Ukuran kristal sampel dengan waktu tahan 2 jam, 3 jam dan 4 jam adalah 25,5 nm, 27,2 nm dan 27,3 nm. Pengukuran konstanta dielektrik (K) dilakukan pada rentang frekuensi 1 kHz. Nilai K sampel dengan waktu tahan 2, 3, dan 4 jam adalah 90, 172 dan 184. Semakin lama waktu tahan sintering, konstanta dielektrik yang dihasilkan juga semakin besar sehingga kapasitansi sampel lebih besar.

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Section: Pendahuluanunclassified

Pembuatan Material Ferroelektrik Barium Titanat (BaTiO3) menggunakan Metode Kopresipitasi

Safitri

Subarwanti

Supriyanto

et al. 2016

JFA

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“…Earlier, the thermal decomposition process has been reported in the literature to take either of the following pathways: 17,18 5 , the powder of the peroxide precursor was heated at 210 ℃ for 4 h, and then the energy dispersive X-ray spectroscopy of the resulting product was measured. Figure 8 displays the results.…”

Section: Reaction Mechanismmentioning

confidence: 99%

“…Because of these applications, barium titanate is well known as the backbone of the electronic industry. [5][6][7][8] Currently, studies in the literature have been carried out on the preparation of ceramic powdered barium titanate, [9][10][11][12] which mainly include two categories of approaches: solid phase reaction and liquid phase reaction. At the mean time, many have been interesting for its reaction mechanism and "size effects".…”

Section: Introductionmentioning

confidence: 99%

Preparation of Barium Titanate Nanopowder through Thermal Decomposition of Peroxide Precursor and Its Formation Mechanism

Peng

Liu

2009

Chin. J. Chem.

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H 2 TiO 3 was dissolved in the mixture of hydrogen formed peroxide and ammonia under the pH range of 8-10 with a transparent yellow solution formed. When an equivalent mole of Ba 2＋ solution was added into the yellow solution, the precipitate produced was the peroxide precursor of barium titanate. The cubic nanopowder of barium titanate was obtained when the precipitate was washed, stoved, and then calcined at 600 for 1 h. The per ℃ oxide precursor of barium titanate and barium titanate nanopowder prepared were characterized to be BaTi(H 2 O 2 ) 2 O 3 by TGA-DTA, XRD, TEM, SEM, and XREDS. The peroxide precursor of barium titanate was determined to be BaTi(H 2 O 2 ) 2 O 3 . The particle size of the barium titanate nanopowder, the calcined product of BaTi(H 2 O 2 ) 2 O 3 , was in the range of 20-40 nm. A formation mechanism of the barium titanate nanopowder through thermal decomposition of its peroxide precursor was proposed and then validated.

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“…In addition to the conventional solid-state method, the techniques such as pyrolysis (Pechini, citrate processes), dispersion (catecholate synthesis, spray pyrolysis, sol-gel), precipitation (oxalate, hydrothermal and solvothermal synthesis) are widely used for the fine-crystalline BaTiO 3 processing. 1,[7][8][9][10][11][12][13][14] But, as some of them are multistage and require the use of auxiliary substances, mostly in the solid state, hydrothermal and oxalate techniques are industrially suitable. The development of a simple and low-cost method for the industrial BaTiO 3 production remains to be a pending problem.…”

Section: Introductionmentioning

confidence: 99%

Preparation and dielectric properties of thermo-vaporous BaTiO3 ceramics

Kholodkova¹,

Danchevskaya²,

Popova³

2015

Mater. Tehnol.

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A crystalline BaTiO3 powder was synthesized at 350°C for 0-20 h from TiO2 (> 99 % purity) and BaO (> 98 % purity) with water vapour acting as the reaction media. According to the XRD and SEM results, the BaTiO3 synthesized for 3 h proved to be the most adequate raw material for ferroelectric ceramics among the obtained samples as long as it consisted of pure crystalline sphere-shaped BaTiO3 particles with the average size of 156 nm. Pellets were pressed at (100, 150 and 200) MPa and sintered at 1300°C for 1 h. The influence of the compacting pressure on the dielectric characteristics of BaTiO3 ceramics was studied by monitoring the permittivity and loss-tangent values of the pellets at 20 Hz-2 MHz. Keywords: barium titanate, thermo-vaporous synthesis, microstructure, dielectric ceramics Kristalni prah BaTiO3 je bil sintetiziran pri 350°C od 0 do 20 h iz TiO2 (~istost: > 99 %) in BaO (~istost: > 98 %) z vodno paro kot reakcijski medij. Iz rentgenogramov in SEM-posnetkov izhaja, da je BaTiO3, sintetiziran 3 h, najprimernej{a surovina med vsemi vzorci za feroelektri~no keramiko, dokler sestoji iz~istih kristalnih okroglih delcev BaTiO3 s povpre~no velikostjo 156 nm. Peleti so bili stiskani pri (100, 150 in 200) MPa in sintrani 1 h pri temperaturi 1300°C. Vpliv tlaka pri stiskanju na dielektri~ne lastnosti keramike BaTiO3 je bil preiskovana s spremljanjem permitivnosti in velikosti izgube tg d peletov pri 20 Hz-2 MHz. Klju~ne besede: barijev titanat, termo-parno porozna sinteza, mikrostruktura, dielektri~na keramika

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A self-sustaining acid-base reaction in semi-aqueous media for synthesis of barium titanyl oxalate leading to BaTiO3 powders

Cited by 18 publications

References 15 publications

Pembuatan Material Ferroelektrik Barium Titanat (BaTiO3) menggunakan Metode Kopresipitasi

Pembuatan Material Ferroelektrik Barium Titanat (BaTiO3) menggunakan Metode Kopresipitasi

Preparation of Barium Titanate Nanopowder through Thermal Decomposition of Peroxide Precursor and Its Formation Mechanism

Preparation and dielectric properties of thermo-vaporous BaTiO3 ceramics

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