The role of a ceramics glaze is to improve the chemical, physical, mechanical, and decorative natures on the surface of unglazed pottery.The water-leaching process has been generally applied to treat ceramics glaze raw materials of natural origin such as feldspar, woods-ash, and straw-ash. The water-leaching process is widely recognized as a key-point technology required to prepare high-quality ceramics glaze raw materials. In this treatment process, the monitoring of the physical characteristics like particle size and the chemical characteristics like concentrations of inorganic ions, pH, alkalinity and electrical conductivity of the water-leaching process for the ceramics glaze raw materials is absolutely essential. [1][2][3][4] However, at present, the water quality monitoring of water-leaching process has not yet carried out because of unsimple, convenient, and practical analytical methods.Ion chromatography (IC) including ion-exclusion chromatography (IEC) is widely recognized as an effective way for determining some common anions and cations as the water quality parameters in several environmental and industrial practical samples. [5][6][7][8][9][10] In previous papers, it has been reported that the simultaneous ion-exclusion/cation-exchange chromatography (IEC/CEC) and the IEC by conductometric detection are useful monitoring methods for the simultaneous determination of anions, cations and alkalinity commonly found in the water-leaching process for the ceramics glaze raw materials. 9,10 The simultaneous IEC/CEC of the common anions such as sulfate, chloride and nitrate ions and cations such as sodium, ammonium, potassium, magnesium and calcium ions were performed using a polymethacrylate-based on a weakly acidic cation-exchange resin in the H + -form as the separation column and 7 mM tartaric acid and 3.5 mM 18-crown-6 as the eluents. On the other hand, the IEC on the polymethacrylate based on a weakly acidic cation-exchange resin in the H + -form as the separation column has been also applied for the selective determination of bicarbonate ion (alkalinity) by elution with water. These IEC/CEC and IEC methods have been applied successfully for the water quality monitoring of various waterleaching ceramics glaze raw materials.Both phosphate and silicate ions in the ceramics glaze raw materials are recognized to be very important substances to characterize the surface state of the ceramics glaze. 11,12 In general, the colorimetric methods using molybdate salt to form molybdenum-yellow or blue at acidic conditions have been used to determine phosphate or silicate ions. 13 The selective and simultaneous ion-exclusion chromatography (IEC) with UV-detection on a weakly acidic cationexchange resin column in the H + -form (TSKgel Super IC-A/C) was developed and applied for the simultaneous determination of phosphate and silicate ions as the water quality parameters required for optimizing the water-leaching process for ceramics glaze raw materials of natural origin including feldspar, woods-ash, and straw-ash. P...

We are developing functionally graded grinding wheels fabricated by a centrifugal mixed-powder method. As a first step of this fabrication method, a powder mixture of abrasive particles and metal matrix particles is inserted into a spinning mould. After that, a metal matrix ingot is melted and then the molten metal matrix is poured into the spinning mould with the powder mixture. As a result, the molten metal matrix penetrates into the space between the particles due to the pressure exerted by the centrifugal force. At the same time, the metal matrix powder is melted by the heat from molten matrix poured from the crucible. Finally, a ring-shaped sample with abrasive particles distributed on its surface (functionally graded grinding wheel) can be obtained. In this study, functionally graded grinding wheel fabricated by the centrifugal mixed-powder method will be reported. 2011) 'Fabrication of functionally graded grinding wheel by a centrifugal mixed-powder method for CFRP-drilling applications', Int.

No abstract

No abstract

Abst act BaTi03, (Ba, Sr) Ti03 and (Ba, P ) Ti03 powd r s with rain sizes usin t h e , w e t titanium gel. Eflfects o! sintering tem e r tureg: subsfitutions of Sr and P b for Ba and Dressures o n Bieaectric *than 0. 1 j m were synthes ed R ydr thermafly at 20°C for 24hproperties -o f BaTiO3 c e r a m i c s -repared with-t h e s e -p o w d e j s -w e r e investigated. T h t e m p e r a t u r e an% C u r i e c o n s t a n t w i t h S r -and P\-contents a n i pressures were found.variations of !he Curie temperat re , Curie-Weis