MANUFACTURE OF COMPOSITE CERAMIC BALL FOR BALL-POINT PEN

PROBLEM TO BE SOLVED: To provide a method manufacturing a composite ceramic ball for a ball-point pen showing an affinity with both oil ink and water ink by developing a new composite ceramic material best suited for the ball for the ball-point pen. SOLUTION: A composite ceramic material composed ma...

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Bibliographische Detailangaben
Hauptverfasser:	MACHIDA TAKAO, ISHIJIMA YASUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE BUREAU ACCESSORIES CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE IMPLEMENTS FOR WRITING OR DRAWING LIME, MAGNESIA METALLURGY PERFORMING OPERATIONS REFRACTORIES SLAG TRANSPORTING TREATMENT OF NATURAL STONE WRITING OR DRAWING IMPLEMENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method manufacturing a composite ceramic ball for a ball-point pen showing an affinity with both oil ink and water ink by developing a new composite ceramic material best suited for the ball for the ball-point pen. SOLUTION: A composite ceramic material composed mainly of mullite.zirconia with the ratio if mullite (3Al2 O3 .2SiO2 ): zirconia (ZrO2 ) of (50:95wt.%):(5-50wt.%) is ground to have a specular finish. Next, the surface of this ball is made uneven by chemical or physical process. The preferred chemical process is an etching process using hydrofluoric acid., and the extent of a process to make the surface uneven can be controlled by the concentration of hydrofluoric acid and etching time.