Mary Reidmeyer - Academia.edu (original) (raw)
Papers by Mary Reidmeyer
Cerâmica, Jun 1, 2001
Current and future research goals in our laboratories include the study of the attack of glass-co... more Current and future research goals in our laboratories include the study of the attack of glass-contact refractories and of crown refractories in glass tank melters, under either air-gas or oxyfuel conditions. There is an emphasis on evaluation and characterization of critical parameters of commercial refractories such as microstructure, porosity and mechanical properties. A second focus is the evaluation of the performance of refractory alternatives to traditional crown and superstructure refractories including their physical aspects, crown design, and joint quality.
Chemischer Informationsdienst, Nov 19, 1985
This document provides a learning module on tempered safety glass. In this activity, instructors ... more This document provides a learning module on tempered safety glass. In this activity, instructors demonstrate the fracture toughness of tempered glass, thereby illustrating how the glass is toughened and introducing the concept of the fractography of glass. It can be used in classrooms from elementary to college levels
https://scholarsmine.mst.edu/art\_in\_the\_library\_summer2017\_exhibit/1016/thumbnail.jp
A lubricant for use in lubricating the shot sleeve of a machine for die casting molten metals is ... more A lubricant for use in lubricating the shot sleeve of a machine for die casting molten metals is in the form of agglomerated particles. The particles have an inorganic high pressure lubricant agglomerated, with a binder material and with an organic material. The solid lubricant is resistant to dusting, caking and breakage, can be fed through an automatic dispensing machine, and combines inorganic and organic materials to achieve excellent lubrication properties. The product has low flash and low smoke release into the environment
Artist’s Statement: The two sculptures are meant to be both stand alone pieces and, when put toge... more Artist’s Statement: The two sculptures are meant to be both stand alone pieces and, when put together, a whole piece to symbolize the two schools becoming one in the collaboration. Because the exchange was the first of hopefully many, the sapling represents new beginnings. As stated before, the color of the fruit represents the two schools: green and gold for Missouri S&T, and garnet and gold for Winthrop University. Both schools shared gold as a color, which served to tie the two sculptures together. The half with Missouri S&T colored fruit remains at Winthrop, and vice versa. Each sculpture has a branch extending into the negative space that is created when the other half is not present. When together, these branches interlock, creating the effect of one complete sculpture. Fluorescent glass incorporated into the mushrooms and roots acts as a segue into the discussion of material properties, in addition to symbolizing the main theme of the collaboration. The sculptures look comple...
https://scholarsmine.mst.edu/art\_in\_the\_library\_summer2017\_exhibit/1017/thumbnail.jp
Water Science & Technology: Water Supply, 2015
Ceramic pot filters (CPFs) have been shown to be an effective means of household water treatment ... more Ceramic pot filters (CPFs) have been shown to be an effective means of household water treatment in the developing world. The filters are typically made using local labor and locally available materials including clay soils and various burn out materials used to create porosity. Artisanal approaches may be used to manufacture the filters, and there have been efforts to improve CPF performance through laboratory studies. The importation of soil to make the filters may be highly regulated and could be cost prohibitive, so some researchers use commercially available clay to fabricate experimental filters. However, such efforts typically do not include a comparison of the engineered clay to native clay soil, nor do most studies compare the performance of experimental CPFs fabricated from engineered clay to CPFs made from native clay. This study compares mineralogical and geotechnical properties of a clay soil from Rabinal, Guatemala, used to produce CPFs in that country to an engineered...
Journal of Non-Crystalline Solids, 1988
Oxygen bonding in nitrided alkali metaphosphate glasses was characterized by X-ray photoelectron ... more Oxygen bonding in nitrided alkali metaphosphate glasses was characterized by X-ray photoelectron spectroscopy. Bridging-to-nonbridging oxygen ratios (BO/NBO) were determined from deconvoluted Ols spectra. As the nitrogen contents of the metaphosphate glasses increased, the BO/NBO ratios decreased. A mechanism based on the equal reactivity of bridging and nonbridging oxygens during the nitridation process is used to explain the observed trends in the oxygen bonding.
https://scholarsmine.mst.edu/art\_in\_the\_library\_summer2017\_exhibit/1018/thumbnail.jp
The preparation techniques and properties of phosphorus oxynitride glasses produced from sodium m... more The preparation techniques and properties of phosphorus oxynitride glasses produced from sodium metaphosphate and nitride compounds are reported. A preliminary survey of possible nitride additives to sodium metaphosphate is presented along with an extended study of the two most promising nitrides, AIN and M g^. Properties reported include: nitrogen content, dissolution rate in water, thermal expansion co efficient, softening point, glass transformation temperature, density, refractive index, microhardness, and infrared absorption.
Water research, 2016
Ceramic pot filters represent a common and effective household water treatment technology in deve... more Ceramic pot filters represent a common and effective household water treatment technology in developing countries, but factors impacting water production rate are not well-known. Turbidity of source water may be principal indicator in characterizing the filter's lifetime in terms of water production capacity. A flow rate study was conducted by creating four controlled scenarios with different turbidities, and influent and effluent water samples were tested for total suspended solids and particle size distribution. A relationship between average flow rate and turbidity was identified with a negative linear trend of 50 mLh(-1)/NTU. Also, a positive linear relationship was found between the initial flow rate of the filters and average flow rate calculated over the 23 day life of the experiment. Therefore, it was possible to establish a method to estimate the average flow rate given the initial flow rate and the turbidity in the influent water source, and to back calculate the maxim...
Journal of the American Ceramic Society, 1987
The structures of phosphorus oxynitride glasses have been de-termined using a combination of soli... more The structures of phosphorus oxynitride glasses have been de-termined using a combination of solid-state 3'P, "N, and *'Na nuclear magnetic resonance and Raman spectroscopies. Raman spectra of model phosphazene compounds with differ-ent types of PN bonding have ...
Journal of Non-Crystalline Solids, 1986
ABSTRACT
Journal of Non-Crystalline Solids, 1994
Abstract Nitriding phosphate glasses of variable sodium content, x NaO·(1− x ) P 2 O 5 , in anhyd... more Abstract Nitriding phosphate glasses of variable sodium content, x NaO·(1− x ) P 2 O 5 , in anhydrous ammonia gas is described. The thermal expansion coefficient and dissolution rate in water decrease with increasing P 2 O 5 and nitrogen content The dilatometric softening point and glass transition temperature decrease with increasing P 2 O 5 and increase with increasing nitrogen content. The water content of the as-melted glasses increases dramatically with increasing P 2 O 5 content. The N 1s and O 1s spectra were determined with X-ray photoelectron spectroscopy.
Journal of Materials Research, 1991
In this paper a model is presented for predicting the structural changes that occur in a metaphos... more In this paper a model is presented for predicting the structural changes that occur in a metaphosphate glass during nitriding in anhydrous ammonia. Predicted values for the nitrogen content, the mole fraction of phosphate groups, the bridging to nonbridging oxygen ratio, and the ratio of the structural types for nitrogen are compared to the values obtained in earlier experimental work. A plausible correlation is found between the values predicted from this structural model and those observed experimentally. In addition, a maximum nitrogen content (N/P = 0.9) is predicted and the lower nitrogen content normally observed is explained.
Journal of Non-Crystalline Solids, 1995
Journal of Water and Health, May 26, 2017
Ceramic pot filter (CPF) technology is a relatively common means of household water treatment in ... more Ceramic pot filter (CPF) technology is a relatively common means of household water treatment in developing areas, and performance characteristics of CPFs have been characterized using production CPFs, experimental CPFs fabricated in research laboratories, and ceramic disks intended to be CPF surrogates. There is evidence that CPF manufacturers do not always fire their products according to best practices and the result is incomplete combustion of the pore forming material and the creation of a carbon core in the final CPFs. Researchers seldom acknowledge the existence of potential existence of carbon cores, and at least one CPF producer has postulated that the carbon may be beneficial in terms of final water quality because of the presence of activated carbon in consumer filters marketed in the Western world. An initial step in characterizing the presence and impact of carbon cores is the characterization of those cores. An optical method which may be more viable to producers relative to off-site laboratory analysis of carbon content has been developed and verified. The use of the optical method is demonstrated via preliminary disinfection and flowrate studies, and the results of these studies indicate that the method may be of use in studying production kiln operation.
Water research, 2016
Ceramic pot filters represent a common and effective household water treatment technology in deve... more Ceramic pot filters represent a common and effective household water treatment technology in developing countries, but factors impacting water production rate are not well-known. Turbidity of source water may be principal indicator in characterizing the filter's lifetime in terms of water production capacity. A flow rate study was conducted by creating four controlled scenarios with different turbidities, and influent and effluent water samples were tested for total suspended solids and particle size distribution. A relationship between average flow rate and turbidity was identified with a negative linear trend of 50 mLh(-1)/NTU. Also, a positive linear relationship was found between the initial flow rate of the filters and average flow rate calculated over the 23 day life of the experiment. Therefore, it was possible to establish a method to estimate the average flow rate given the initial flow rate and the turbidity in the influent water source, and to back calculate the maxim...
Cerâmica, Jun 1, 2001
Current and future research goals in our laboratories include the study of the attack of glass-co... more Current and future research goals in our laboratories include the study of the attack of glass-contact refractories and of crown refractories in glass tank melters, under either air-gas or oxyfuel conditions. There is an emphasis on evaluation and characterization of critical parameters of commercial refractories such as microstructure, porosity and mechanical properties. A second focus is the evaluation of the performance of refractory alternatives to traditional crown and superstructure refractories including their physical aspects, crown design, and joint quality.
Chemischer Informationsdienst, Nov 19, 1985
This document provides a learning module on tempered safety glass. In this activity, instructors ... more This document provides a learning module on tempered safety glass. In this activity, instructors demonstrate the fracture toughness of tempered glass, thereby illustrating how the glass is toughened and introducing the concept of the fractography of glass. It can be used in classrooms from elementary to college levels
https://scholarsmine.mst.edu/art\_in\_the\_library\_summer2017\_exhibit/1016/thumbnail.jp
A lubricant for use in lubricating the shot sleeve of a machine for die casting molten metals is ... more A lubricant for use in lubricating the shot sleeve of a machine for die casting molten metals is in the form of agglomerated particles. The particles have an inorganic high pressure lubricant agglomerated, with a binder material and with an organic material. The solid lubricant is resistant to dusting, caking and breakage, can be fed through an automatic dispensing machine, and combines inorganic and organic materials to achieve excellent lubrication properties. The product has low flash and low smoke release into the environment
Artist’s Statement: The two sculptures are meant to be both stand alone pieces and, when put toge... more Artist’s Statement: The two sculptures are meant to be both stand alone pieces and, when put together, a whole piece to symbolize the two schools becoming one in the collaboration. Because the exchange was the first of hopefully many, the sapling represents new beginnings. As stated before, the color of the fruit represents the two schools: green and gold for Missouri S&T, and garnet and gold for Winthrop University. Both schools shared gold as a color, which served to tie the two sculptures together. The half with Missouri S&T colored fruit remains at Winthrop, and vice versa. Each sculpture has a branch extending into the negative space that is created when the other half is not present. When together, these branches interlock, creating the effect of one complete sculpture. Fluorescent glass incorporated into the mushrooms and roots acts as a segue into the discussion of material properties, in addition to symbolizing the main theme of the collaboration. The sculptures look comple...
https://scholarsmine.mst.edu/art\_in\_the\_library\_summer2017\_exhibit/1017/thumbnail.jp
Water Science & Technology: Water Supply, 2015
Ceramic pot filters (CPFs) have been shown to be an effective means of household water treatment ... more Ceramic pot filters (CPFs) have been shown to be an effective means of household water treatment in the developing world. The filters are typically made using local labor and locally available materials including clay soils and various burn out materials used to create porosity. Artisanal approaches may be used to manufacture the filters, and there have been efforts to improve CPF performance through laboratory studies. The importation of soil to make the filters may be highly regulated and could be cost prohibitive, so some researchers use commercially available clay to fabricate experimental filters. However, such efforts typically do not include a comparison of the engineered clay to native clay soil, nor do most studies compare the performance of experimental CPFs fabricated from engineered clay to CPFs made from native clay. This study compares mineralogical and geotechnical properties of a clay soil from Rabinal, Guatemala, used to produce CPFs in that country to an engineered...
Journal of Non-Crystalline Solids, 1988
Oxygen bonding in nitrided alkali metaphosphate glasses was characterized by X-ray photoelectron ... more Oxygen bonding in nitrided alkali metaphosphate glasses was characterized by X-ray photoelectron spectroscopy. Bridging-to-nonbridging oxygen ratios (BO/NBO) were determined from deconvoluted Ols spectra. As the nitrogen contents of the metaphosphate glasses increased, the BO/NBO ratios decreased. A mechanism based on the equal reactivity of bridging and nonbridging oxygens during the nitridation process is used to explain the observed trends in the oxygen bonding.
https://scholarsmine.mst.edu/art\_in\_the\_library\_summer2017\_exhibit/1018/thumbnail.jp
The preparation techniques and properties of phosphorus oxynitride glasses produced from sodium m... more The preparation techniques and properties of phosphorus oxynitride glasses produced from sodium metaphosphate and nitride compounds are reported. A preliminary survey of possible nitride additives to sodium metaphosphate is presented along with an extended study of the two most promising nitrides, AIN and M g^. Properties reported include: nitrogen content, dissolution rate in water, thermal expansion co efficient, softening point, glass transformation temperature, density, refractive index, microhardness, and infrared absorption.
Water research, 2016
Ceramic pot filters represent a common and effective household water treatment technology in deve... more Ceramic pot filters represent a common and effective household water treatment technology in developing countries, but factors impacting water production rate are not well-known. Turbidity of source water may be principal indicator in characterizing the filter's lifetime in terms of water production capacity. A flow rate study was conducted by creating four controlled scenarios with different turbidities, and influent and effluent water samples were tested for total suspended solids and particle size distribution. A relationship between average flow rate and turbidity was identified with a negative linear trend of 50 mLh(-1)/NTU. Also, a positive linear relationship was found between the initial flow rate of the filters and average flow rate calculated over the 23 day life of the experiment. Therefore, it was possible to establish a method to estimate the average flow rate given the initial flow rate and the turbidity in the influent water source, and to back calculate the maxim...
Journal of the American Ceramic Society, 1987
The structures of phosphorus oxynitride glasses have been de-termined using a combination of soli... more The structures of phosphorus oxynitride glasses have been de-termined using a combination of solid-state 3'P, "N, and *'Na nuclear magnetic resonance and Raman spectroscopies. Raman spectra of model phosphazene compounds with differ-ent types of PN bonding have ...
Journal of Non-Crystalline Solids, 1986
ABSTRACT
Journal of Non-Crystalline Solids, 1994
Abstract Nitriding phosphate glasses of variable sodium content, x NaO·(1− x ) P 2 O 5 , in anhyd... more Abstract Nitriding phosphate glasses of variable sodium content, x NaO·(1− x ) P 2 O 5 , in anhydrous ammonia gas is described. The thermal expansion coefficient and dissolution rate in water decrease with increasing P 2 O 5 and nitrogen content The dilatometric softening point and glass transition temperature decrease with increasing P 2 O 5 and increase with increasing nitrogen content. The water content of the as-melted glasses increases dramatically with increasing P 2 O 5 content. The N 1s and O 1s spectra were determined with X-ray photoelectron spectroscopy.
Journal of Materials Research, 1991
In this paper a model is presented for predicting the structural changes that occur in a metaphos... more In this paper a model is presented for predicting the structural changes that occur in a metaphosphate glass during nitriding in anhydrous ammonia. Predicted values for the nitrogen content, the mole fraction of phosphate groups, the bridging to nonbridging oxygen ratio, and the ratio of the structural types for nitrogen are compared to the values obtained in earlier experimental work. A plausible correlation is found between the values predicted from this structural model and those observed experimentally. In addition, a maximum nitrogen content (N/P = 0.9) is predicted and the lower nitrogen content normally observed is explained.
Journal of Non-Crystalline Solids, 1995
Journal of Water and Health, May 26, 2017
Ceramic pot filter (CPF) technology is a relatively common means of household water treatment in ... more Ceramic pot filter (CPF) technology is a relatively common means of household water treatment in developing areas, and performance characteristics of CPFs have been characterized using production CPFs, experimental CPFs fabricated in research laboratories, and ceramic disks intended to be CPF surrogates. There is evidence that CPF manufacturers do not always fire their products according to best practices and the result is incomplete combustion of the pore forming material and the creation of a carbon core in the final CPFs. Researchers seldom acknowledge the existence of potential existence of carbon cores, and at least one CPF producer has postulated that the carbon may be beneficial in terms of final water quality because of the presence of activated carbon in consumer filters marketed in the Western world. An initial step in characterizing the presence and impact of carbon cores is the characterization of those cores. An optical method which may be more viable to producers relative to off-site laboratory analysis of carbon content has been developed and verified. The use of the optical method is demonstrated via preliminary disinfection and flowrate studies, and the results of these studies indicate that the method may be of use in studying production kiln operation.
Water research, 2016
Ceramic pot filters represent a common and effective household water treatment technology in deve... more Ceramic pot filters represent a common and effective household water treatment technology in developing countries, but factors impacting water production rate are not well-known. Turbidity of source water may be principal indicator in characterizing the filter's lifetime in terms of water production capacity. A flow rate study was conducted by creating four controlled scenarios with different turbidities, and influent and effluent water samples were tested for total suspended solids and particle size distribution. A relationship between average flow rate and turbidity was identified with a negative linear trend of 50 mLh(-1)/NTU. Also, a positive linear relationship was found between the initial flow rate of the filters and average flow rate calculated over the 23 day life of the experiment. Therefore, it was possible to establish a method to estimate the average flow rate given the initial flow rate and the turbidity in the influent water source, and to back calculate the maxim...