Electrical properties and thermal expansion of cordierite and cordierite-mullite materials

Camerucci, M.A.; Urretavizcaya, G.; Castro, Miriam Susana; Cavalieri, A.L.

doi:10.1016/s0955-2219(01)00219-9

Cited by 147 publications

(75 citation statements)

References 10 publications

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“…[32]). The mineralogical composition of both bodies after iring in both cases is characterized by the existence of mullite and glass phase.…”

Section: Sintering Of Whiteware Body Depending On Luxing Agent (Feldsmentioning

confidence: 99%

Sintering of Whiteware Body Depending on Different Fluxing Agents and Binders

Sokolar¹

2018

Sintering of Functional Materials

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The sintering of whiteware (porcelain) body can be afected by using luxing agents or binders. The chapter describes the sintering process of porcelain body in case of different luxing agent (diferent feldspar rocks, bone ash, zeolite) and binder (kaolin vs. calcium aluminate cement) utilization in the porcelain raw material mixture. Sintering process is presented according to thermodilatometrical curves and sintering temperatures especially.

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“…[32]). The mineralogical composition of both bodies after iring in both cases is characterized by the existence of mullite and glass phase.…”

Section: Sintering Of Whiteware Body Depending On Luxing Agent (Feldsmentioning

confidence: 99%

Sintering of Whiteware Body Depending on Different Fluxing Agents and Binders

Sokolar¹

2018

Sintering of Functional Materials

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“…A very important technical property of anorthite is its low coefficient of linear thermal expansion coefficient of 4.82×10 -6 K -1 7 (compared with mullite 6.00×10 -6 K -1 ). 8 …”

Section: Results Of Experimentsmentioning

confidence: 99%

Non-traditional whiteware based on calcium aluminate cement

Sokolar¹

2016

Mater. Tehnol.

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The article introduces the differences in the properties of whiteware (porosity, strength, thermal expansion coefficient) when a non-traditional binder is used. Pure calcium aluminate cement and a mixture of kaolin and calcium aluminate cement compared with traditional plastic raw material for whiteware -kaolin -are used for the preparation of whiteware bodies with a constant content of non-plastic raw materials: K-Na feldspar and quartz sand. The results are discussed in connection with the microstructure of the fired body of prepared whitewares (mineralogical composition). Calcium aluminate cement (CAC) in whiteware raw-material mixtures is an interesting alternative to kaolin for a higher strength of the green and fired bodies. Using calcium aluminate cement reduces the sintering temperature of the fired body and significantly changes its mineralogical composition: anorthite is the main mineralogical phase instead of mullite, which is typical for standard porcelain bodies made from raw-material mixtures based on kaolin. The coefficient of thermal expansion increases with an increasing content of CAC in the raw-materials mixture. Keywords: calcium aluminate cement, kaolin, whitewarê lanek predstavlja razlike v lastnostih porcelana (poroznost, trdnost, koeficient toplotnega raztezka),~e se uporabi neobi~ajno vezivo.^isti kalcijev aluminatni cement in me{anica kaolina in kalcijevega aluminatnega cementa, v primerjavi s tradicionalno plasti~no sestavino porcelana -kaolina, so bili uporabljeni za kerami~na telesa s konstantno vsebnostjo neplasti~nih surovin; K-Na glinenec in kvar~ni pesek. Rezultati so razlo`eni v povezavi z mikrostrukturo telesa pripravljene keramike (mineralo{ka sestava) po`ganju. Kalcijev aluminatni cement (CAC), v me{anici surovin za keramiko, je zanimivo nadomestilo za kaolin, za vi{jo trdnost zelenega in`ganega telesa. Uporaba kalcijevega aluminatnega cementa zni`a temperaturo sintranja`ganega telesa in mo~no spremeni njegovo mineralo{ko sestavo; anortit je glavna mineralo{ka faza namesto mulita, ki je zna~ilen v standardnih porcelanskih telesih, izdelanih iz me{anice surovin na osnovi kaolina. Koeficient toplotnega raztezka se pove~uje z ve~anjem vsebnosti CAC v me{anici surovin. Klju~ne besede: kalcijev aluminatni cement, kaolin, porcelan

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“…During past decades Alumino silicate ceramic composite was used as an advanced structural ceramics and now it is well known as a promising electronic material with some great properties such as high melting point, antierosion, better chemical stability to oxidation as well as good resistance to most chemical attack, great coercivity, good electrical resistance, good mechanical strength, low thermal expansion coefficient, very good high temperature strength and also a low cost material [1][2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

<strong>Cobalt Alumino Silicate Ceramic(CASC) nanocomposite, a material with moderately high dielectric constant </strong><strong>and low tangent loss at a critical concentration in high frequency range.</strong>

Paul

Manna

Roy

et al. 2015

Proceedings of MOL2NET, International Conference on Multidisciplinary Sciences

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Cobalt Alumino Silicate Ceramic (CASC) composites, with different molar weight concentration (i.e. G0=0, G1=0.4, G2=0.6, G3=0.8, G4=1.0, and G5=1.2 (M.W.)) of cobaltus acetate are prepared via sol-gel route. XRD shows mullite and cobalt aluminate phase which is found to depend on the concentrations of Co +2 ions. Field emission scanning electron microscope (FESEM) images show for all samples of CASC nanocomposites after sintering at 1400 o C, nano sized cobalt aluminate grains are embedded in evenly spread mullite grains; but in case of G0, there are only evenly spread mullite grains. The study of dielectric property of the composite samples at room temperature shows that at all concentration (G1, G2, G3, G4 and G5) the dielectric constant is higher than pure mullite (G0) and there is a critical concentration of cobaltus acetate (G3) where there is maximum enhancement of dielectric constant in the higher frequency range from 40 KHz to 2 MHz. The dielectric constant varies from 44.77 to 37.75 for G3 and from 29.8 to 24.12 for G0 respectively. The tangent loss of composite with G3 has the lowest value than that of other concentrations including pure mullite in the frequency range 40 KHz to 2MHz. Due to high dielectric constant and low tangent loss, the composite with specific concentration and in the high frequency range has great importance as an electronic material. .

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Electrical properties and thermal expansion of cordierite and cordierite-mullite materials

Cited by 147 publications

References 10 publications

Sintering of Whiteware Body Depending on Different Fluxing Agents and Binders

Sintering of Whiteware Body Depending on Different Fluxing Agents and Binders

Non-traditional whiteware based on calcium aluminate cement

<strong>Cobalt Alumino Silicate Ceramic(CASC) nanocomposite, a material with moderately high dielectric constant </strong><strong>and low tangent loss at a critical concentration in high frequency range.</strong>

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