scholarly journals Low - Temperature Sintering of Porous Ceramics via Sodium Borate Addition

2019 ◽  
Vol 16 (1) ◽  
pp. 48-55 ◽  
Author(s):  
AYSE KALEMTAS
Keyword(s):  
Low Temperature ◽  
Corn Starch ◽  
Porous Ceramic ◽  
Porous Ceramics ◽  
Sodium Borate ◽  
Low Temperature Sintering ◽  
Atmospheric Conditions ◽  
Air Atmosphere ◽  
Sintering Additive ◽  
Starch Consolidation

In the current study, sodium borate-bonded highly open porous ceramics successfully produced by starch consolidation technique. Open porous ceramic production was carried out by using an economical grade a-Si3N4, corn starch, CC31 commercial-grade kaolin, and borax decahydrate (Na2B4O7.10H2O). Borax decahydrate was used as a sintering aid in the system and total ceramic (a-Si3N4 + CC31): borax decahydrate ratio was kept constant at 5:1. Sintering studies of the shaped samples carried out in an air atmosphere at a relatively low sintering temperature, 1100°C, for one hour. Scanning electron microscopy investigations of the porous ceramic samples revealed that due to the high amount of borax based sintering additive a significant amount of liquid phase formed during the sintering process of the designed ceramics. Highly open porous(~66-74%) and lightweight(~0.64-0.83 g/cm3) ceramics were produced via starch consolidation technique and low-temperature sintering at atmospheric conditions.

scholarly journals Starch consolidation of SiC ceramics: processing and low-temperature sintering in an air atmosphere

2020 ◽  
Vol 8 (1) ◽  
pp. 106-115
Author(s):  
Ayse Kalemtas ◽  
Gülsüm Topates ◽  
M. Türkay Aytekin Aydin ◽  
Nigar Özey
Keyword(s):  
Low Temperature ◽  
Low Temperature Sintering ◽  
Air Atmosphere ◽  
Sic Ceramics ◽  
Starch Consolidation

Low temperature sintering of nano-SiC using a novel Al8B4C7 additive

2010 ◽  
Vol 25 (3) ◽  
pp. 471-475 ◽  
Author(s):  
Sea-Hoon Lee ◽  
Byung-Nam Kim ◽  
Hidehiko Tanaka
Keyword(s):  
Grain Size ◽  
Liquid Phase ◽  
Low Temperature ◽  
Sintering Temperature ◽  
Applied Pressure ◽  
Liquid Phase Sintering ◽  
Low Temperature Sintering ◽  
Densification Rate ◽  
Sintering Additive ◽  
Average Grain Size

Al8B4C7 was used as a sintering additive for the densification of nano-SiC powder. The average grain size was approximately 70 nm after sintering SiC-12.5wt% Al8B4C7 at 1550 °C. The densification rate strongly depended on the sintering temperature and the applied pressure. The rearrangement of SiC particles occurred at the initial shrinkage, while viscous flow and liquid phase sintering became important at the middle and final stage of densification.

Low Temperature Sintering of (Ba0.98Ca0.02)(Sn0.04Ti0.96)O3 Ceramics Using CuO-B2O3 as a Sintering Additive

2014 ◽  
Vol 602-603 ◽  
pp. 813-816
Author(s):  
Jian Qiang Zhou ◽  
Ke Pi Chen
Keyword(s):  
Low Temperature ◽  
Piezoelectric Properties ◽  
Sintering Temperature ◽  
Solid State Reaction Method ◽  
Low Temperature Sintering ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Sintering Additive ◽  
Precision Impedance Analyzer

The effects of CuO-B2O3(CBO) additive on densification, microstructure, and electrical properties of (Ba0.98Ca0.02)(Sn0.04Ti0.96)O3(BCST) cermaics were investigated. The phase compositions, microstructure, dielectric, ferroelectric and piezoelectric properties of BCST ceramics were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), precision impedance analyzer, ferroelectric tester and quasi-static piezoelectric constant testing meter, respectively. The results show that CuO-B2O3(CBO) frit can improve the densification and promote low-temperature sintering of BCST ceramics prepared by a conventional solid-state reaction method. Dense BCST ceramics with CBO can be sintered at temperatures as low as 1175 °C, which is approximately 275 °C less than the sintering temperature of pure BCST. When sintered at 1200 °C, the optimized properties of the BCST ceramics with 0.5 wt% CBO were obtain asε= 1206,d33= 346 pC/N,kP= 0.39, tgδ = 0.009.

Low-temperature sintering of SiC reticulated porous ceramics with MgO–Al2O3–SiO2 additives as sintering aids

2007 ◽  
Vol 42 (13) ◽  
pp. 4960-4966 ◽  
Author(s):  
Xiumin Yao ◽  
Shouhong Tan ◽  
Xiangyu Zhang ◽  
Zhengren Huang ◽  
Dongliang Jiang
Keyword(s):  
Low Temperature ◽  
Porous Ceramics ◽  
Low Temperature Sintering ◽  
Sintering Aids

Effect of Starch Addition on Microstructure and Strength of Ball Clay Membrane

2014 ◽  
Vol 69 (9) ◽  
Author(s):  
Maisarah Mohamed Bazin ◽  
Muhd Amirudin Ahmat ◽  
Nurhanna Zaidan ◽  
Ahmad Fauzi Ismail ◽  
Norhayati Ahmad
Keyword(s):  
Corn Starch ◽  
Starch Content ◽  
Porous Ceramic ◽  
Physical And Mechanical Properties ◽  
Porous Ceramics ◽  
Bending Test ◽  
Compaction Process ◽  
Ceramic Structure ◽  
Ball Clay ◽  
Clay Membrane

The use of starch as pore-forming agent is one of the frequently used methods to produce porous ceramics membrane with controlled microstructure (porosity and pore size) because corn starch are cheap, non- toxic and environmental friendly. A membrane with the mixture 0–35 wt% of corn starch and ball clay were prepared by compaction process and sintered at 1200°C. Thermal analysis has been done to identify the minimum sintering temperature for ball clay. The sintered membranes show the range value of shrinkage is 4.5–22.76 % and apparent porosity of 9.14–31.83 % depending on the starch content. The pore structures were analyzed by FESEM. The strength of sintered samples was tested by 3-point bending test. The flexural strength reduced from 21–7 MPa. These clay membrane are promising porous ceramic structure for water filtration applications due to their excellent combination physical and mechanical properties.

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