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  • Both sides (5 mm in diameter) of a silver-coated quartz crystal microbalance (QCM) resonator were covered with CuO nanostructures; the resonator was used as a sensing probe in a quartz crystal resonator. The resonant frequency shift indicates the absorbance of HCN gas on the sensor. As the specific area of CuO nanostructure used for coating the probe changes from 9.3 m2/g to 1.5 m2/g, the sensitivity reduces from 2.26 to 0.31 Hz/μg. In both reports, the authors showed that the sensitivity of sen The effect of the gelation time in the chemical reaction to change the phase from sol to gel on the gel and quartz powder states was investigated by observing the absorbance spectra of the gels and powders at wavenumbers of 500–4000 cm−1. In the case of the gel state, four peaks appeared in the absorbance spectrum, i.e., a broad OH stretching peak at 3000–3700 cm−1 derived from the OH group, an OH bending peak at ~1640 cm−1, an asymmetric Si−O−Si stretching (VasSi−O−Si) peak at ~1075 cm−1, and a The gel-pulverizing process on the morphology of the as-synthesized quartz powders. Three hours after the ion exchange process, SiO2 sol was changed into a single lump of gel; when subjected to the gel-pulverizing process, the gel lump was separated into many gel lumps of several mm. In addition, the morphology of the quartz powder synthesized via the gel-pulverizing process was very different from that produced without the gel-pulverizing process, as is shown in the SEM images. The morphology o The water glass typically used in industry is synthesized using sodium and potassium silicate. In our experiment, as the selective adsorption of the strongly acidic cation exchange resin is greater when the valence of the ion is larger, the water glass was synthesized via a KOH solution rather than a NaOH solution to use a potassium ion with a relatively large valence in terms of efficiency. When synthesizing fumed silica-based quartz powder, we prepared a potassium silicate solution mixed with The transmittance spectra of potassium silicate solutions at wavelengths ranging from 300 to 1000 nm and at wavenumbers ranging from 500 to 2000 cm−1 were measured via UV–visible spectroscopy (Cary 5000, Agilent Technologies Co., Inc., Santa Clara, CA, USA) and Fourier-transform infrared spectroscopy (FT-IR, Nicolet iS50, Thermo Scientific Co., Inc., Waltham, MA, USA) with attenuated total reflection (ATR) mode, respectively. After the gelation process, the morphology and crystallinity of the tw The process involves preparing the potassium silicate solution, ion exchange, gelation, freezing, thawing, drying, cleaning, and sintering. First, 500 g of potassium silicate solution was prepared by mixing with six wt% fumed silica, 2.4 wt% KOH, and 91.6 wt% deionized water. The solution was poured into polypropylene (PP) bottles and placed on hotplates at 80 °C for 24 h under 300 rpm mechanical stirring via a magnetic stirrer. The experiment for the dependency of dissociation of fumed silica o we develop a novel fumed silica-based sol–gel process for synthesizing ultra-high-purity quartz powder to achieve the requirements of semiconductor technology with a design rule of 3 nm, i.e., a metal impurity level of less than 100 ppb and median size distribution (d50) of the powder of about 150–200 μm�m. In particular, the optimal process conditions for preparing potassium silicate solution, gelation time, and cleaning process of the as-synthesized quartz powder were determined by analyzing t For quartz crucibles used in Czochralski technology, a 3 nm thick inner layer of quartz crucible is fabricated by fusing and coating synthetic quartz powder instantaneously on the inner surface of a quartz crucible formed of natural quartz through the arc plasma process. Since the inner layer is in direct contact with molten poly-Si at a high temperature of ~1500 °C during the growth process, the purity level of the synthetic quartz powder is required to be more than 99.9999% (6 nines, 6 N). In Fumed silica-based ultra-high-purity synthetic quartz powder was developed via the sol–gel process to apply to quartz wares and quartz crucibles for use in advanced semiconductor processes. The process conditions of preparing potassium silicate solution, gelation, and cleaning were optimized, i.e., the relative ratio of fumed silica (10 wt%) to KOH (4 wt%) for potassium silicate gelation time of three h and cleaning for one h with five wt% HCl solution. It was observed that the gelation time str Quartz Powder is formed by the calcination of the smallest (SiO2) dust particles, which are formed due to the decomposition of the quartz-rich magmatic metamorphic rocks by calcination of high-purity quartz ore at 900 * C. It is an important raw material needed in many branches of industry and consumed in high amounts. Single-crystal quartz powder with high-quality quartz crystals useful for special purposes is used in silica optics or electronics. USGS has approximately ten billion quartz cryst

Silver coated quartz crystal microbalance resonator were covered with CuO nanostructures

Both sides (5 mm in diameter) of a silver-coated quartz crystal microbalance (QCM) resonator were covered with CuO nanostructures; the resonator was used as a sensing probe in a quartz crystal resonator. The resonant frequency shift indicates the absorbance of HCN gas on the sensor. As the specific area of CuO nanostructure used for coating the probe changes from 9.3 m2/g to 1.5 m2/g, the sensitivity reduces from 2.26 to 0.31 Hz/μg. In both reports, the authors showed that the sensitivity of sen

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Dependencies of Quartz Powder Formation on Gelation Time

The effect of the gelation time in the chemical reaction to change the phase from sol to gel on the gel and quartz powder states was investigated by observing the absorbance spectra of the gels and powders at wavenumbers of 500–4000 cm−1. In the case of the gel state, four peaks appeared in the absorbance spectrum, i.e., a broad OH stretching peak at 3000–3700 cm−1 derived from the OH group, an OH bending peak at ~1640 cm−1, an asymmetric Si−O−Si stretching (VasSi−O−Si) peak at ~1075 cm−1, and a

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Effect of the Gel Pulverizing Process on the Morphology of the As Synthesized Quartz Powder

The gel-pulverizing process on the morphology of the as-synthesized quartz powders. Three hours after the ion exchange process, SiO2 sol was changed into a single lump of gel; when subjected to the gel-pulverizing process, the gel lump was separated into many gel lumps of several mm. In addition, the morphology of the quartz powder synthesized via the gel-pulverizing process was very different from that produced without the gel-pulverizing process, as is shown in the SEM images. The morphology o

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Chemical Properties of Potassium Silicate Solutions Depending on KOH and SiO2 Concentration

The water glass typically used in industry is synthesized using sodium and potassium silicate. In our experiment, as the selective adsorption of the strongly acidic cation exchange resin is greater when the valence of the ion is larger, the water glass was synthesized via a KOH solution rather than a NaOH solution to use a potassium ion with a relatively large valence in terms of efficiency. When synthesizing fumed silica-based quartz powder, we prepared a potassium silicate solution mixed with

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Characterization of Quartz Powder

The transmittance spectra of potassium silicate solutions at wavelengths ranging from 300 to 1000 nm and at wavenumbers ranging from 500 to 2000 cm−1 were measured via UV–visible spectroscopy (Cary 5000, Agilent Technologies Co., Inc., Santa Clara, CA, USA) and Fourier-transform infrared spectroscopy (FT-IR, Nicolet iS50, Thermo Scientific Co., Inc., Waltham, MA, USA) with attenuated total reflection (ATR) mode, respectively. After the gelation process, the morphology and crystallinity of the tw

More>>

Materials and Methods of Quartz Powder

The process involves preparing the potassium silicate solution, ion exchange, gelation, freezing, thawing, drying, cleaning, and sintering. First, 500 g of potassium silicate solution was prepared by mixing with six wt% fumed silica, 2.4 wt% KOH, and 91.6 wt% deionized water. The solution was poured into polypropylene (PP) bottles and placed on hotplates at 80 °C for 24 h under 300 rpm mechanical stirring via a magnetic stirrer. The experiment for the dependency of dissociation of fumed silica o

More>>

Gelation process in the formation of quartz powder

we develop a novel fumed silica-based sol–gel process for synthesizing ultra-high-purity quartz powder to achieve the requirements of semiconductor technology with a design rule of 3 nm, i.e., a metal impurity level of less than 100 ppb and median size distribution (d50) of the powder of about 150–200 μm�m. In particular, the optimal process conditions for preparing potassium silicate solution, gelation time, and cleaning process of the as-synthesized quartz powder were determined by analyzing t

More>>

Quartz crucibles used in Czochralski technology

For quartz crucibles used in Czochralski technology, a 3 nm thick inner layer of quartz crucible is fabricated by fusing and coating synthetic quartz powder instantaneously on the inner surface of a quartz crucible formed of natural quartz through the arc plasma process. Since the inner layer is in direct contact with molten poly-Si at a high temperature of ~1500 °C during the growth process, the purity level of the synthetic quartz powder is required to be more than 99.9999% (6 nines, 6 N). In

More>>

Fumed Silica Based Ultra High Purity Synthetic Quartz Powder via Sol Gel Process

Fumed silica-based ultra-high-purity synthetic quartz powder was developed via the sol–gel process to apply to quartz wares and quartz crucibles for use in advanced semiconductor processes. The process conditions of preparing potassium silicate solution, gelation, and cleaning were optimized, i.e., the relative ratio of fumed silica (10 wt%) to KOH (4 wt%) for potassium silicate gelation time of three h and cleaning for one h with five wt% HCl solution. It was observed that the gelation time str

More>>

Quartz Powder

Quartz Powder is formed by the calcination of the smallest (SiO2) dust particles, which are formed due to the decomposition of the quartz-rich magmatic metamorphic rocks by calcination of high-purity quartz ore at 900 * C. It is an important raw material needed in many branches of industry and consumed in high amounts. Single-crystal quartz powder with high-quality quartz crystals useful for special purposes is used in silica optics or electronics. USGS has approximately ten billion quartz cryst

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Quartz Powder Uses

Quartz powder is a versatile material with various uses in various industries. At Arihant Micron Chittorgarh, we are a leading manufacturer and exporter of high-quality quartz powder used in various applications. In this blog, we will explore some of the most common uses of quartz powder. Construction Industry: Quartz powder is an essential component in the construction industry. It is used as a filler in cement and concrete to improve strength and durability. It is also used as an additive in a

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Will clear quartz to replace any crystal

What is Quartz powder?Quartz is a strong and crystalline mineral made of silicon and oxygen particles. It is one of the most popular and rich minerals with various applications discovered on Earth. It is a significant element of rocks and applications in all temperatures. Quartz is transparent or white in its purest form, but several impurities within the atomic structure can change color. There are many varieties of quartz with several uses. Quartz sand and ground quartz or quartz powder are ut

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