BR102020014600A2 - composite formed with a mixture of lead powder and barite powder to coat ceramic pieces in order to attenuate radiation x - Google Patents

composite formed with a mixture of lead powder and barite powder to coat ceramic pieces in order to attenuate radiation x Download PDF

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BR102020014600A2
BR102020014600A2 BR102020014600-9A BR102020014600A BR102020014600A2 BR 102020014600 A2 BR102020014600 A2 BR 102020014600A2 BR 102020014600 A BR102020014600 A BR 102020014600A BR 102020014600 A2 BR102020014600 A2 BR 102020014600A2
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powder
mixture
barite
lead
order
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Gladis Aparecida Galindo Reisemberger De Souza
Ramón Sigifredo Cortés Paredes
Frieda Saicla Barros
Carlos Dalmaso Neto
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Universidade Federal Do Parana
Universidade Tecnológica Federal Do Paraná
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/448—Sulphates or sulphites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C04B35/645—Pressure sintering
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/02—Selection of uniform shielding materials
    • G21F1/06—Ceramics; Glasses; Refractories

Abstract

COMPOSITO FORMADO COM MISTURA DE PÓ DE CHUMBO E PÓ DEBARITA PARA REVESTIR PEÇAS CERAMICAS A FIM DE ATENUARRADIAÇÃO XO presente trabalho, pertencente ao setor de Engenharia de Superfícies /Aspersão Térmica /Tecnologia Radiológica, teve como propósito o desenvolvimento de revestimento a base de pó de chumbo (Pb) reciclado e pó de barita (BaSO4) misturados resultando em um composito chamado de gladizite, que é a mistura de Barita (BaSO4), Coesite (SiO), Galena (PbS), Blixite (Pb2ClO2(OH)). O propósito deste composito é revestir peças cerâmicas por meio da tecnologia de Aspersão Térmica, a fim de atenuar a radiação X , fixando as mesmas nas paredes das salas de exames, em clinicas médicas, hospitais, consultórios odontológicos e ambientes industriais.COMPOSITE FORMED WITH LEAD POWDER AND DEBARITE POWDER MIXTURE TO COVER CERAMIC PARTS IN ORDER TO ATTENUATE RADIATION XThis work, belonging to the Surface Engineering / Thermal Spray / Radiological Technology sector, aimed at the development of lead powder coating (Pb) recycled and barite powder (BaSO4) mixed resulting in a compound called gladizite, which is the mixture of Barite (BaSO4), Coesite (SiO), Galena (PbS), Blixite (Pb2ClO2 (OH)). The purpose of this composite is to coat ceramic parts using thermal spray technology, in order to attenuate X radiation, fixing them on the walls of examination rooms, in medical clinics, hospitals, dental offices and industrial environments.

Description

Campo de invençãoInvention field

[001]. Desenvolvimento de composito, de uma mistura de pó de chumbo reciclado com pó de barita, compactados e fundidos por sinterização, Este material pode ser utilizado como revestimento (pela técnologia de Aspersão Térmica) de peças cerâmicas para atenuação dos raios X.[001]. Development of composite, from a mixture of recycled lead powder with barite powder, compacted and melted by sintering. This material can be used as a coating (using the Thermal Sprinkler technology) of ceramic pieces to attenuate X-rays.

Fundamentos da Invenção e Estado da TécnicaFundamentals of the Invention and State of the Art

[002]. Radiação ionizante é um problema sério no que diz respeito a saúde das pessoas, e a evolução das tecnologias na área radiológica está avançando sempre, sendo necessário que a proteção radiológica a acompanhe, seja na proteção das pessoas envolvidas no processo, bem como no custo de materiais, facilidade na construção civil e reformas. Hoje, para proteção radiológica nestes ambientes, utilizam-se placas de chumbo recheando paredes e também camadas muito grossas de concreto baritado o que dificulta reforma, mudança ou nova construção de locais para diagnósticos por raios X. Desta forma, observando isto, fomos motivados a trabalhar para criar um produto que pudesse facilitar em todos estes aspectos, formando um material em pó que pudesse ser utilizado como revestimento para proteção radiológica.[002]. Ionizing radiation is a serious problem with regard to people's health, and the evolution of technologies in the radiological area is always advancing, being necessary that the radiological protection accompanies it, be it in the protection of the people involved in the process, as well as in the cost of materials, ease of construction and reforms. Today, for radiological protection in these environments, lead plates are used filling walls and also very thick layers of barred concrete, which makes it difficult to renovate, change or re-build sites for X-ray diagnostics. Thus, observing this, we were motivated to work to create a product that could facilitate in all these aspects, forming a powder material that could be used as a coating for radiological protection.

[003]. Assim desenvolveu-se um composito que é a junção de dois materiais, o Pb reciclado e a BaSO4. A necessidade de proteção do trabalhador, ou do indivíduo que utiliza radiação ionizante, como meio de diagnóstico ou de ferramenta de trabalho, é algo bastante complexo, porém extremamente indispensável. Na redução de custos e redução do impacto ambiental, os resíduos de chumbo em pó que são reutilizados (e.g., baterias velhas) misturados aos pós de barita, foram usados como material atenuante para ambientes onde são empregadas as radiações ionizantes.[003]. Thus, a composite was developed which is the combination of two materials, recycled Pb and BaSO4. The need for protection of the worker, or the individual who uses ionizing radiation, as a means of diagnosis or as a work tool, is something very complex, but extremely indispensable. In reducing costs and reducing the environmental impact, powdered lead residues that are reused (e.g., old batteries) mixed with barite powders, have been used as a mitigating material for environments where ionizing radiation is used.

[004]. Barros (2009)1 propôs em sua Tese de doutorado um material em pó de chumbo com deposito do mesmo em placa metálica, por aspersão térmica, obtendo bons resultados de atenuação, no entanto, pode-se minimizar os efeitos tóxicos do chumbo encapsulando-os em materiail em pó de barita e foi o que este trabalho propôs tendo ótimos resultados de atenuação. O material proposto para revestimento, após sinterização da mistura, foi uma proposta inovadora, no que diz respeito a sua viabilidade, à praticidade de aplicação na construção ou reforma de uma sala onde se utiliza radiação ionizante. Além disso a questão do aproveitamento do descarte de chumbo é interessante para os cuidados com o meio ambiente. Portanto o produto desenvolveu-se a partir de possibilidade de revestir cerâmica.Existem estudos e registros de Patentes de pó de chumbo com pó de barita, cujas numerações são: CN107629578A e WO2015199276A1 que demonstram um tipo de mistura com os materiais barita e chumbo com álcool polivinilico e pó de cálcio, que não estão associados com material e método utilizado no desenvolvimento deste compósito.[004]. Barros (2009) 1 proposed in his doctoral thesis a material in lead powder with deposit of the same in metallic plate, by thermal spray, obtaining good attenuation results, however, the toxic effects of lead can be minimized by encapsulating them in material in barite powder and this is what this work proposed with excellent attenuation results. The material proposed for coating, after sintering the mixture, was an innovative proposal, with regard to its viability, the practicality of application in the construction or renovation of a room where ionizing radiation is used. In addition, the issue of the use of lead disposal is interesting for the care of the environment. Therefore, the product was developed from the possibility of coating ceramics. There are studies and registrations of patents for lead powder with barite powder, whose numbers are: CN107629578A and WO2015199276A1 that demonstrate a type of mixture with the materials barite and lead with alcohol polyvinyl and calcium powder, which are not associated with material and method used in the development of this composite.

[005]. Além da praticidade adquirida com este material, o objetivo é também proporcionar a reciclagem de resíduos de chumbo para a mistura dos materiais, já que é possível reutilizar o chumbo de baterias, pilhas, e outros objetos feitos do mesmo. A contaminação do meio ambiente por materiais tóxicos, como é o caso do chumbo e a logística do descarte, é um assunto de extrema importância, e estes materiais, como baterias e afins, podem ser transformados em pó e reutilizados para confecção de revestimento atenuante para proteger os indivíduos das radiações ionizantes.[005]. In addition to the practicality acquired with this material, the objective is also to provide the recycling of lead residues for the mixing of materials, since it is possible to reuse lead from batteries, batteries, and other objects made of it. Contamination of the environment by toxic materials, such as lead and the logistics of disposal, is a matter of extreme importance, and these materials, such as batteries and the like, can be transformed into powder and reused for making an attenuating coating for protect individuals from ionizing radiation.

Descrição detalhada da InvençãoDetailed description of the Invention

[006]. Os materiais iniciais utilizados foram o Pb e BaSO4 ambos em pó, misturados, em um misturador chamado de misturador Y, compactados no interior de uma matriz onde se colocou uma pressão em cima da mistura dos pós e sequencialmente houve sinterização em um forno com a temperatura de 700°C, por três horas. Na compactação os pós se aglomeraram e tornaram-se muito bem compactados, na sinterização os pós se agregaram formando uma massa com aparência de pedra, de cor amarela esverdeada, conforme ilustra a Figura 1. A pedra foi moída, num moinho e peneirada, utilizando-se peneiras apropriadas para granulometrias e assim obteve-se grãos na faixa de +63 -180 micrometros, i.e., maior que 63 μm menor que 180 μm.[006]. The initial materials used were Pb and BaSO4, both in powder, mixed, in a mixer called Y-mixer, compacted inside a matrix where pressure was placed on top of the powder mixture and sequentially there was sintering in an oven with the temperature 700 ° C, for three hours. In compaction the powders agglomerated and became very well compacted, in sintering the powders aggregated to form a greenish-yellow stone-like mass, as shown in Figure 1. The stone was ground, in a mill and sieved, using Sieves suitable for particle sizes are obtained and thus grains are obtained in the range of +63 -180 micrometers, ie, greater than 63 μm less than 180 μm.

[007]. Para a caracterização do composito, foi realizada a difratometria de raios X, encontrando as fases do mesmo, ilustradas na Figura 6 e demonstradas na Tabela 1, abaixo.

Figure img0001
[007]. For the characterization of the composite, X-ray diffractometry was performed, finding the phases of it, illustrated in Figure 6 and shown in Table 1, below.
Figure img0001

[008]. Com os resultados da análise por difratometria de raios X pode-se organizar o modelo matemático realizado pelo programa XCOM3 e o traçado das curvas de atenuação para a comparação do material compósito (mistura formada Gladizite) com o chumbo, material de referência.[008]. With the results of the analysis by X-ray diffraction, it is possible to organize the mathematical model performed by the XCOM3 program and to trace the attenuation curves for the comparison of the composite material (mixture formed Gladizite) with the lead, reference material.

[009]. Avaliando-se as curvas de atenuação em massa, da mistura adquirida juntamente com a do chumbo, que é material de referência, pode-se afirmar que o chumbo é mais atenuante, quando se refere a exposição aos raios X, no entanto a fase Gladizite está próxima da curva do chumbo e atinge um bom desempenho quanto a atenuação da radiação X. O gráfico do estudo se apresenta na Figura 7.[009]. Evaluating the mass attenuation curves of the mixture acquired together with that of lead, which is a reference material, it can be said that lead is more attenuating when referring to exposure to X-rays, however the Gladizite phase it is close to the lead curve and achieves a good performance in terms of X radiation attenuation. The study graph is shown in Figure 7.

[010]. O propósito do composito é revestir peças cerâmicas por meio da tecnologia de Aspersão Térmica, a fim de atenuar a radiação X , fixando as mesmas nas paredes das salas de exames, em clinicas médicas, hospitais, consultórios odontológicos e ambientes industriais.[010]. The purpose of the composite is to coat ceramic parts using the Thermal Sprinkler technology, in order to attenuate X radiation, fixing them on the walls of the examination rooms, in medical clinics, hospitals, dental offices and industrial environments.

Descrição das figurasDescription of the figures

[011]. Figura 1 - Aglomerado obtido pela mistura de chumbo e barita após sinterização.[011]. Figure 1 - Agglomerate obtained by mixing lead and barite after sintering.

[012]. Figura 2 - Microscopia eletronica de varredura (MEV), material moído.[012]. Figure 2 - Scanning electron microscopy (SEM), ground material.

[013]. Figura 3 - MEV do material moído.[013]. Figure 3 - SEM of the ground material.

[014]. Figura 4 - MEV do material moído.[014]. Figure 4 - SEM of the ground material.

[015]. Figura 5 - Imagem de elétrons.[015]. Figure 5 - Image of electrons.

[016]. Figura 6 - Difratometria de raios x, das misturas do pó de barita com o pó de chumbo.[016]. Figure 6 - X-ray diffractometry, of mixtures of barite powder with lead powder.

[017]. Figura 7 - Curvas de atenuação em massa x energia para material de referência e compósito referente aos pós misturados.[017]. Figure 7 - Mass-energy attenuation curves for reference material and composite for mixed powders.

Claims (3)

1. Composito caracterizado por conter:a) Pelo menos 29,3% de Barita (BaSO4);b) Pelo menos 58,6% de Coesite (SiO);c) Pelo menos 5,1% de Galena (PbS);d) Pelo menos 7,1% de Blixite (Pb2ClO2(OH)).1. Composition characterized by containing: a) At least 29.3% Barite (BaSO4); b) At least 58.6% Cohesite (SiO); c) At least 5.1% Galena (PbS); d ) At least 7.1% Blixite (Pb2ClO2 (OH)). 2. Composito, de acordo com a reivindicação 1, caracterizado por atenuar radiação x.Composite according to claim 1, characterized by attenuating radiation x. 3. Processo para elaboração de composito caracterizado por conter as etapas:a) Mistura de chumbo reciclado em pó com barita em pó em um misturador Y acoplado em um torno com rotação realizada por aproximadamente uma hora;b) Compactação da mistura no interior de uma matriz onde se colocou pressão sobre a mesma;c) Sinterização e fundição do material misturado em um forno com a temperatura de 700°C, por três horas, fundindo os pós que se transformaram num material com aparencia de pedra;d) Moagem do material resultante da fundição em um moinho;e) O pó formado é peneirado para granulometria esperada.3. Process for the elaboration of composites, characterized by the following steps: a) Mixture of recycled lead powder with barite powder in a Y mixer coupled in a lathe with rotation performed for approximately one hour; b) Compaction of the mixture inside a matrix where pressure was placed on it; c) Sintering and casting the mixed material in an oven at a temperature of 700 ° C for three hours, melting the powders that became a stone-like material; d) Grinding the material resulting from casting in a mill; e) The powder formed is sieved to the expected granulometry.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115572150A (en) * 2022-09-29 2023-01-06 贵州大学 Barite radiation-proof ceramic plate and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115572150A (en) * 2022-09-29 2023-01-06 贵州大学 Barite radiation-proof ceramic plate and preparation method thereof
CN115572150B (en) * 2022-09-29 2023-09-01 贵州大学 Barite radiation-proof ceramic plate and preparation method thereof

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B22L Other matters related to patents and certificates of addition of invention: notification of licence offer (art 64 par 1 of lpi)

Free format text: CONDICOES CONTRATUAIS: 1) ROYALTIES: 5% (CINCO POR CENTO) DO PRECO DE VENDA, LIVRE DE IMPOSTOS; 2) PRAZO: ATE O TERMINO DE VIGENCIA DA PATENTE EM 17.07.2040; 3) CONDICOES DE PAGAMENTO: ANUAL, EM FUNCAO DAS VENDAS APURADAS NO PERIODO; 4) DISPONIBILIDADE DE "KNOW-HOW": SIM; 5) ASSISTENCIA TECNICA: NAO. - OBS: CONSULTA A CARTA PATENTE PODERA SER FEITA ATRAVES DO ENDERECO ELETRONICO WWW.INPI.GOV.BR - NO ACESSO RAPIDO = BUSCA DE PROCESSOS = FACA LOGIN COM SENHA OU TECLE CONTINUAR = PATENTE = DIGITE O NUMERO DO PROCESSO = PESQUISAR. PARA ACESSAR, CADASTRE-SE NO PORTAL DO INPI.

B22L Other matters related to patents and certificates of addition of invention: notification of licence offer (art 64 par 1 of lpi)

Free format text: CONDICOES CONTRATUAIS: 1) ROYALTIES: 5% (CINCO POR CENTO) DO PRECO DE VENDA, LIVRE DE IMPOSTOS; 2) PRAZO: ATE O TERMINO DE VIGENCIA DA PATENTE EM 17.07.2040; 3) CONDICOES DE PAGAMENTO: ANUAL, EM FUNCAO DAS VENDAS APURADAS NO PERIODO; 4) DISPONIBILIDADE DE KNOW-HOW: SIM; 5) ASSISTENCIA TECNICA: NAO. --- OBS: CONSULTA A CARTA PATENTE PODERA SER FEITA ATRAVES DO ENDERECO ELETRONICO WWW.INPI.GOV.BR - NO ACESSO RAPIDO = BUSCA DE PROCESSOS = FACA LOGIN COM SENHA OU TECLE CONTINUAR = PATENTE = DIGITE O NUMERO DO PROCESSO = PESQUISAR. PARA ACESSAR, CADASTRE-SE NO PORTAL DO INPI.

B22L Other matters related to patents and certificates of addition of invention: notification of licence offer (art 64 par 1 of lpi)

Free format text: CONDICOES CONTRATUAIS: 1) ROYALTIES: 5% (CINCO POR CENTO) DO PRECO DE VENDA, LIVRE DE IMPOSTOS; 2) PRAZO: ATE O TERMINO DE VIGENCIA DA PATENTE EM 17.07.2040; 3) CONDICOES DE PAGAMENTO: ANUAL, EM FUNCAO DAS VENDAS APURADAS NO PERIODO; 4) DISPONIBILIDADE DE KNOW-HOW: SIM; 5) ASSISTENCIA TECNICA: NAO. --- OBS: CONSULTA A CARTA PATENTE PODERA SER FEITA ATRAVES DO ENDERECO ELETRONICO WWW.INPI.GOV.BR - NO ACESSO RAPIDO = BUSCA DE PROCESSOS = FACA LOGIN COM SENHA OU TECLE CONTINUAR = PATENTE = DIGITE O NUMERO DO PROCESSO = PESQUISAR. PARA ACESSAR, CADASTRE-SE NO PORTAL DO INPI.