The effect of precipitation temperature, i.e. particle morphology on the rheological properties of a hydroxyapatite (HA) slip was investigated and compared to a commercial HA (batch P120 supplied by Plasma Biotal, Tideswell, Derbyshire, UK). The commercial HA was highly crystalline and had a particle size much larger than the HA precipitated at 60 and 80 degrees C. With no deflocculant addition...

Slip casting is a ceramic processing technique which can be used to produce complex-shape object. In the present work, slip was applied 70 mm × 10 15 green samples from recycled soda-lime glass. The with 60% solid loading prepared 100 g of cullet, 1 sodium silicate as binder, 50 ml DI water, and 16.7 deflocculant. deflocculant for 0.1 wt% tripolyphosphate solution. After casting, were dried at ...

This work aims to evaluate the use of bottom biomass ash as an alternative raw material in porcelain stoneware bodies. For this purpose, coming from a thermoelectric power plant Emilia-Romagna (Italy) was selected and its chemical, mineralogical thermal properties determined. Data indicated technological role flux, so it introduced batch partial replacement feldspars experimented at laboratory ...

In this work, copper oxides-based photocathodes for photoelectrochemical cells (PEC) were produced the first time by screen printing. A total 7 × 10−3 g/m2 glycerine trioleate was found as optimum deflocculant amount to assure stable and homogeneous inks, based on CuO nano-powder. The inks formulated considering different binder amounts deposited producing films with homogenous thickness, micro...

A comparative analysis of the effectiveness deflocculating effect Russian and international polycarboxylate ethers additives on rheological properties high-alumina matrix suspensions is presented in this article. For production functional systems, submicron activated α-alumina modified high alumina cement are used ratio 80:20 90:10 wt. %, respec-tively. fluidity with a moisture content 20% carr...

The influence of particle shape (aspect ratio) on the intrinsic viscosity is investigated, taking three Czech kaolin products (floated kaolins) as paradigmatic examples. An average aspect ratio is obtained for each kaolin from a comparison of particle size measurements using sedimentation and laser diffraction. The intrinsic viscosity is obtained by a multistep procedure: firstly, flow curves a...

Clay deflocculants that are commonly used in water-based muds under high temperature pressure (HTHP) oilwell drilling conditions have been found to contain chromium which is toxic. Tannin-based regarded as a more environmentally friendly and suitable alternative the chrome-based deflocculants. However, tannin-based not studied extensively understood completely, for past two years, there many ac...

Zirconium silicate (zircon, ZrSiO4) is a ceramic material with excellent thermal properties, such as low conductivity and high shock resistance. In this work, dense zircon complex shaped parts were obtained by aqueous gelcasting through agar gelation. The colloidal stability study was performed zeta potential measurements function of pH polyacrylic-based deflocculant concentration (PAA). rheolo...

The unwanted addition of salt to drilling causes flocculation which has an adverse effect on mud rheological properties. To treat the flocculated mud chemical, deflocculants are commonly used; however, their disadvantages such as negative environmental effects, lower tolerance to contamination, and toxicity motivated scientists to search for effective additives. Using plant derived additives in...

The forrning process is very important in the production of ceramics because the defects introduced during this manufacturing step will remain in the product even after the sintering process.In this work the rheological properties of aqueous suspensions of Si3N4-Si-A1203-Zr0 2 powders are studied in order to define the appropriate conditions for preparing good slips for the production of high t...