Researcher:
Çiçek, Buğra

Profile Picture
ORCID

Job Title

Researcher

First Name

Buğra

Last Name

Çiçek

Name

Name Variants

Çiçek, Buğra

Email Address

Birth Date

Filters

2017 - 20205

Advanced Search

Filter by

Settings

Researcher Of Publications: search.filters.isAuthorOfPublication.4d331a2c-796b-46e9-a2ee-c683d8670789

Search Results

Now showing 1 - 5 of 5
  • Placeholder
    PublicationMetadata only
    Waste recycling of cathode ray tube glass through industrial production of transparent ceramic frits
    (Taylor & Francis Inc, 2019) Karaahmet, Oğuz; N/A; Çiçek, Buğra; Other; Koç University AKKİM Boron-Based Materials & High-technology Chemicals Research & Application Center (KABAM) / Koç Üniversitesi AKKİM Bor Tabanlı Malzemeler ve İleri Teknoloji Kimyasallar Uygulama ve Araştırma Merkezi (KABAM); N/A; Koç University AKKİM Boron-Based Materials & High-technology Chemicals Research & Application Center (KABAM) / Koç Üniversitesi AKKİM Bor Tabanlı Malzemeler ve İleri Teknoloji Kimyasallar Uygulama ve Araştırma Merkezi (KABAM); N/A
    Cathode ray tube (CRT) glass contains significant amounts of alkali and alkaline earth oxides, making it a useful by-product for use in the ceramics industry. Among the various alkali oxides present, those of strontium (SrO), calcium (CaO), and magnesium (MgO) are well known flux materials used widely in the ceramics industry. The most effective flux, SrO, is also a limited resource. In this study, we aimed to develop an environmentally friendly, low-cost method for recycling CRT waste by using it to produce transparent ceramic frits on an industrial scale. Four different samples were fabricated containing between 13 and 25 wt.% CRT panel glass. The color values, sintering behaviors, phases, and microstructural properties of the corresponding samples were analyzed and compared. The results indicate that a composition containing 25 wt.% CRT panel glass could pass the ISO 10545 test. Thus, the results confirm that CRT glass can be used to inexpensively produce transparent ceramic frits at an industrial scale. Implications: The recycling of electronic waste (e-waste), including CRT waste, has increased by high rates of computer and TV consumption. This increase in consumption is likely to increase the rate at which CRTs are discarded. However, CRTs cannot be recycled in the desired amount. Owing to the high silicate, barium and strontium content of CRTs, it has great potential for glass ceramics such as frits. CRT panel glass to produce commercial transparent frit at low cost through an industrial production route for use in single-fire sintered products. Thus, CRT wastes can be recycled cost-effective, sustainable and environmentally friendly.
  • Placeholder
    PublicationMetadata only
    Boron mining and enrichment waste: a promising raw material for porcelain tile production
    (Wiley, 2020) N/A; N/A; N/A; Karadağlı, Emirhan; Çiçek, Buğra; Researcher; Researcher; Koç University Boron and Advanced Materials Application and Research Center (KUBAM) / Koç Üniversitesi Bor ve İleri Malzemeler Uygulama ve Araştırma Merkezi (KUBAM); Koç University Boron and Advanced Materials Application and Research Center (KUBAM) / Koç Üniversitesi Bor ve İleri Malzemeler Uygulama ve Araştırma Merkezi (KUBAM); N/A; N/A; N/A; N/A
    Boron mining and enrichment waste (BW) from boric acid (H3BO3) production is a by-product of the boron industry. BW exhibits B2O3 contents of 16-31 wt%, and therefore, could be used to effectively lower the sintering temperature of ceramics without increasing their thermal expansion coefficient. Herein, we introduced 3-10 wt% of BW to a formulation used for commercial porcelain tile production, and achieved a sintering temperature decrease of 38 degrees C (to 1195 degrees C). The resulting porcelain tiles exhibited a strength of 44.80 MPa and water absorption percentage of 0.01%, and therefore, met TS ISO EN 10545 requirements. Thus, this study paves the way for the use and valorization of BW in the production of porcelain tiles and could inspire the search for other opportunities to utilize BW in ceramic production.
  • Placeholder
    PublicationMetadata only
    Use of boron mining waste as an alternative to boric acid (H3BO3) in opaque frit production
    (Elsevier Sci Ltd, 2018) Duman, Fatma; Çiçek, Buğra; Karadağlı, Emirhan; Researcher; Researcher; Koç University AKKİM Boron-Based Materials & High-technology Chemicals Research & Application Center (KABAM) / Koç Üniversitesi AKKİM Bor Tabanlı Malzemeler ve İleri Teknoloji Kimyasallar Uygulama ve Araştırma Merkezi (KABAM); N/A; N/A; N/A; N/A
    Colemanite (CaO center dot 3B(2)O3 center dot 5H(2)) enrichment waste material from mines was employed as an alternative to boric acid (H3BO3) for producing opaque matt frits. The aim of the study was to reduce boric acid consumption and to substitute boron-containing waste material for H3BO3 used for frit production. Laboratory and pilot-scale production was carried out based on frit production methods currently used in the ceramic industry. The fits were then used to produce commercial glossy opaque glazes using existing fabrication and sintering processes with amounts ranging between 16 and 31 wt%. The fabricated glazes successfully passed EN ISO 10545 testing, exhibiting desirable surface abrasion, chemical resistance, thermal shock resistance, and staining characteristics.
  • Placeholder
    PublicationMetadata only
    Recent advances in hydrophilic modification of PVDF ultrafiltration membranes – a review: part ii
    (Elsevier, 2017) Subaşı, Yaprak; N/A; Çiçek, Buğra; Researcher; Koç University AKKİM Boron-Based Materials & High-technology Chemicals Research & Application Center (KABAM) / Koç Üniversitesi AKKİM Bor Tabanlı Malzemeler ve İleri Teknoloji Kimyasallar Uygulama ve Araştırma Merkezi (KABAM); N/A; 203187
    This two-part review article – the first instalment of which was published in last month's issue of the newsletter, whilst the second appears here – focuses on recent advances in hydrophilic modification methods that are applied to poly(vinylidene fluoride) (PVDF) ultrafiltration (UF) membranes (UFMs) in order to enhance antifouling performance, mechanical strength and chemical resistance.
  • Placeholder
    PublicationMetadata only
    Recent advances in hydrophilic modification of PVDF ultrafiltration membranes – a review: part i
    (Elsevier, 2017) Subaşı, Yaprak; N/A; Çiçek, Buğra; Researcher; Koç University AKKİM Boron-Based Materials & High-technology Chemicals Research & Application Center (KABAM) / Koç Üniversitesi AKKİM Bor Tabanlı Malzemeler ve İleri Teknoloji Kimyasallar Uygulama ve Araştırma Merkezi (KABAM); N/A; 203187
    With the increasing importance of water treatment and wastewater recovery, the use of membrane processes, to obtain drinking and tap water, is spreading rapidly worldwide. Poly(vinylidene fluoride) (PVDF) has been used extensively in ultrafiltration (UF) membranes because of its outstanding properties, such as high mechanical strength, thermal stability and chemical resistance. Nevertheless, membranes made from PVDF may be susceptible to biofouling because of the material's strong hydrophobicity. This review article focuses on recent advances in hydrophilic modification methods that are applied to PVDF UF membranes in order to enhance antifouling performance, mechanical strength and chemical resistance. The first instalment, which appears here, provides details of the types of membrane fouling and fouling mechanisms, and modification methods such as surface coating and surface grafting that are used to increase the hydrophilicity of PVDF UF membranes.