NOVELTY - The bendable water stable ceramic membrane comprises bonded ceramic nanowires, and integrally bonded ceramic membrane layers. The ceramic membrane passes the four inch diameter Bendability Test, and has a pore size of 50-150 nm, a tensile strength of greater than 11.5 MPa and a porosity of 80%. The ceramic nanowires are made by a hydrothermal process, and have a bond that comprises titanium-oxygen link, aluminum-oxygen link, silicon-oxygen link or zirconium-oxygen link. The layers comprise sodium titanate bonded nanowire membrane layer.    USE - The bendable water stable ceramic membrane (claimed) is useful for large scale industrial purification or separation processes, for applications under harsh chemical and/or thermal conditions, as high temperature particulate filters, in coal gasification processes and for fabricating battery separator for the electric vehicle market.    ADVANTAGE - The bendable water stable ceramic membrane can be economically manufactured with good tensile and mechanical strength and robustness, high temperature resistance and excellent chemical stability and filtration performance.    DETAILED DESCRIPTION - The bendable water stable ceramic membrane comprises bonded ceramic nanowires, and integrally bonded ceramic membrane layers. The ceramic membrane passes the four inch diameter Bendability Test, and has a pore size of 50-150 nm, a tensile strength of greater than 11.5 MPa and a porosity of 80%. The ceramic nanowires are made by a hydrothermal process, and have a bond that comprises titanium-oxygen link, aluminum-oxygen link, silicon-oxygen link or zirconium-oxygen link. The layers comprise sodium titanate bonded nanowire membrane layer, potassium titanate bonded nanowire membrane layer and a porous ceramic membrane layer, and have different pore dimensions. The porous ceramic membrane layer comprises glass fibers. A non-titanate nanofiber is integrated into the membrane structure, and is a glass fiber. INDEPENDENT CLAIMS are included for:    (1) a device for making a bendable water stable ceramic membrane; and    (2) a method of making a bendable water stable ceramic membrane.    DESCRIPTION OF DRAWING(S) - The diagram shows a flow chart of a membrane fabrication process.