title: Leaching behavior of CRT funnel glass.
abstract: The leaching behavior of cathode ray tube (CRT) funnel glass containing 23 mass percent of Pb in 0.001 N HCl, distilled water, and 0.001 N NaOH at 90°C was investigated using a static method. The weight loss and leached amount of each component was measured and surface changes observed by SEM. The leaching mechanism is discussed. In acid solution, the leached amount of Pb showed t(1/2) dependence, that is, diffusion-controlled dependence, which is common in lead silicate glasses. In water and basic solutions, the leached amount showed saturation after higher initial dissolution than in acid and the deposition of many particles on the surface was observed. The amount leached was less for Pb than other components. The deposited particles formed a protective layer, which suppressed the dissolution of the glass. This dense layer must be formed as a result of a high initial dissolution rate.
authors.affiliation: Advanced Glass Group, Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), AIST Kansai, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan. Electronic address: m-yamashita1@ni.aist.go.jp.
authors.forename: Masaru
authors.initials: M
authors.lastname: Yamashita
authors.affiliation: Advanced Glass Group, Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), AIST Kansai, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan; Ceramic Design and Manufacturing Group, National Metal and Materials Technology Center (MTEC), NSTDA, Paholyothin Rd., Klong 1, Klong Luang, Pathumthani 12120, Thailand.
authors.forename: Anucha
authors.initials: A
authors.lastname: Wannagon
authors.affiliation: Advanced Glass Group, Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), AIST Kansai, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan.
authors.forename: Sachiko
authors.initials: S
authors.lastname: Matsumoto
authors.affiliation: Advanced Glass Group, Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), AIST Kansai, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Akai
authors.affiliation: Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Sugita
authors.affiliation: Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
authors.forename: Yukari
authors.initials: Y
authors.lastname: Imoto
authors.affiliation: Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Komai
authors.affiliation: Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Sakanakura
mesh_terms: D004566:Electrodes; D005898:Glass; D007854:Lead / Q000737:chemistry
chemical_list: D007854:Lead