How to produce high purity quartz sand for crucible?
2019-12-6 The quartz sand produced by this method can be completely applied to the raw materials of high-purity and low aluminum quartz crucible for quartz crucible in semiconductor electronic industry, which is of great significance to the development of semiconductor electronic industry.
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US20020166341A1 - Technique for quartz crucible ...
A method for fabricating fused quartz crucibles is disclosed. Quartz sand is placed in a rotating fusion pot and takes on the shape of a bowl as a result of centrifugal forces. The quartz sand is heated to a temperature sufficient to melt and fuse the quartz sand together. A fast diffusing gas such as helium or hydrogen is passed through the quartz sand to displace residual gases present in ...
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Method for quartz crucible fabrication - General Electric ...
A method for quartz crucible formation controlling an atmosphere surrounding a crucible mold that is at least substantially enclosed in a chamber by: a. replacing an ambient atmosphere with an atmosphere comprising desired gases, b. monitoring the outflow of said desired gases at a point after said desired gases have passed through said mold ...
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CN108531980B - Improved quartz crucible and method for ...
The invention relates to an improved quartz crucible and a manufacturing method thereof, belonging to the technical field of monocrystalline silicon manufacturing equipment, and the invention can increase the contact porosity of the quartz crucible and a graphite crucible by increasing the roughness of the outer surface of the quartz crucible, when the quartz crucible reacts with the graphite ...
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Making of fused quartz and fused silica - Heraeus
Continuous fusion: In the continuous method, quartz sand is poured into the top of a vertical melter that consists of a refractory metal crucible surrounded by electric heating elements. The interior is maintained in a neutral or slightly reducing atmosphere that
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US4416680A - Method of making quartz glass crucibles,
To make quartz glass crucibles suitable for drawing of single crystal silicon for electronic semiconductor applications, granular crystalline quartz or amorphous quartz glass is introduced into a rotating hollow mold which has gas-pervious wall regions at the side walls and bottom thereof, for example by having bores extending through a metal mold or being made of porous, sintered material.
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Method for producing quartz glass crucible - JAPAN
1. A method for producing a quartz glass crucible, the method comprising melting a quartz powder molded product loaded on the inner side of a mold, through arc discharge from an arc electrode, while performing vacuum suction, wherein the melting of quartz powder is initiated from the rim edge of the quartz powder molded product, and then lowering the arc electrode or raising the mold, to thus ...
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The ash-quartz sand interaction behaviours during steam ...
2020-3-1 The ash-quartz sand interaction test was conducted at 900 °C for a range of reaction times, namely 10 min, 30 min, 1 h and 6 h under either a steam gasification or a combustion atmosphere using steam/N 2 (50% v/v steam) or air/N 2 (5% v/v O 2) mixtures, respectively. The reaction time for each interaction test was started when the crucible was ...
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Czochralski process vs Float Zone method? 2 growth ...
2020-12-27 With the CCZ method a continuous supply of molten polycrystalline silicon is achieved by using a double quartz crucible. In the first one the crystal is grown and in the second one, connected to the first one, a reservoir of molten silicon is kept, that can
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ADVANCED PURIFICATION OF INDUSTRIAL QUARTZ
2019-7-2 Purification of quartz using an environment-friendly method is important in the contaminants removal. This paper presents advanced method based on calcination pretreatment combined with ultrasound-assisted leaching, for removing iron impurities from industrial quartz. The solvent used is a mixture comprised by diluted hydrochloric acid and ...
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Making of Fused Quartz and Fused Silica - QSI Quartz
2018-1-15 In the continuous method, quartz sand is poured into the top of a vertical melter that consists of a refractory metal crucible surrounded by electric heating elements. The interior is maintained in a neutral or slightly reducing atmosphere that keeps the
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Quartz crucibles are behind the growth of silicon crystals ...
2021-11-15 Especially in the process of silicon crystal growth, quartz crucible has become an irreplaceable key component! Generally speaking, quartz crucibles are divided into electric arc quartz crucibles and quartz ceramic crucibles, depending on the preparation process and application. Arc quartz crucibles are mainly used for direct-drawing of ...
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New method of structural analysis and measurement of V ...
2021-10-30 Surfaces of quartz sand grains with Vs were measured by CLSM. New methods to evaluate surfaces of sand grains and to quantify the microstructures of Vs were developed. Surface textures of quartz grains can be evaluated by international surface-roughness standard parameters (i.e., Svk, Vvv, and Sdr of ISO 25178-2). The average aperture area ...
MoreThe ash-quartz sand interaction behaviours during steam ...
2020-3-1 The ash-quartz sand interaction test was conducted at 900 °C for a range of reaction times, namely 10 min, 30 min, 1 h and 6 h under either a steam gasification or a combustion atmosphere using steam/N 2 (50% v/v steam) or air/N 2 (5% v/v O 2) mixtures, respectively. The reaction time for each interaction test was started when the crucible was ...
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Opaque Fused Silica Electric Arc Quartz Crucible - China ...
Quartz crucible can be used around 1400 C degrees. It can be divided into two types: clear and opaque. The opaque quartz crucible by the arc method is an essential basic material for the development of large-scale integrated circuits. Clear quartz crucibles
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High Purity Quartz Sand - SINOSI
2014-8-18 High Purity Quartz Sand 1. Application The high purity quartz sand (HPQ) is one of main materials in the silica and silicon industry field. It is produced by the silica ore (or said natural quartz or crystal ore) through and by the processing and creating ways of crushing, grinding, classification, sorting, chemical washing and
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Vacuum Melting of Quartz Glass with Layered Filling of a ...
2017-7-14 Quartz glass occupies a special place among other forms of glass, since it possesses unique physical-chemical properties. The developers of new articles and users of quartz glass are attracted by the low linear thermal expansion coefficient, high UV and IR range of the spectrum, high heat resistance, good dielectric properties, high acid resistance, and so on.
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Categories - Fused Silica, Fused Quartz, Quartz Powder
2021-3-4 With responsible good quality method, good status and excellent client services, the series of solutions produced by our company are exported to lots of countries and regions for Fused Silica Flour, Can Quartz Be Scratched, Refractory Materials, Silica Quartz Powder, Welcome all nice buyers communicate details of solutions and ideas with us!!While using the "Client-Oriented" organization ...
MorePhysical and chemical methods of quartz sand purification ...
2021-5-3 The complexation method is to use quartz powder after acid leaching, the acid can form coordination compounds with impurity ions in the solution, so that the impurity ions in the solution can be further removed. Both physical and chemical methods play an irreplaceable role in the whole process of quartz sand purification.
MoreMaking of Fused Quartz and Fused Silica - QSI Quartz
2018-1-15 In the continuous method, quartz sand is poured into the top of a vertical melter that consists of a refractory metal crucible surrounded by electric heating elements. The interior is maintained in a neutral or slightly reducing atmosphere that keeps the
MoreQuartz crucibles are behind the growth of silicon crystals ...
2021-11-15 Especially in the process of silicon crystal growth, quartz crucible has become an irreplaceable key component! Generally speaking, quartz crucibles are divided into electric arc quartz crucibles and quartz ceramic crucibles, depending on the preparation process and application. Arc quartz crucibles are mainly used for direct-drawing of ...
MoreOpaque Fused Silica Electric Arc Quartz Crucible - China ...
Quartz crucible can be used around 1400 C degrees. It can be divided into two types: clear and opaque. The opaque quartz crucible by the arc method is an essential basic material for the development of large-scale integrated circuits. Clear quartz crucibles
More
Quartz Glass - QSI Quartz
2021-2-2 “The quartz sand is melted in an electric arc furnace. The resulting glass ingots are crushed and molded; the formed parts are dried and sintered. In this method, the quartz glass produced is white and opaque and does not generally belong to any types of quartz glass. However, it is comparable to transparent quartz in terms of purity level.
MoreHigh Purity Quartz Sand - SINOSI
2014-8-18 High Purity Quartz Sand 1. Application The high purity quartz sand (HPQ) is one of main materials in the silica and silicon industry field. It is produced by the silica ore (or said natural quartz or crystal ore) through and by the processing and creating ways of crushing, grinding, classification, sorting, chemical washing and
More
Liquinert quartz crucible for the growth of ...
2015-9-1 Furthermore, a quartz crucible coated by BaO is often used to reduce the pollution from the crucible wall for the growth of single crystal Si by the Czochralski method 13. Therefore, in this study, barium hydroxide was spread all over the inner surface of a quartz crucible (GE214), and then it was heated to form a coating layer, as shown in ...
MoreVacuum Melting of Quartz Glass with Layered Filling of a ...
2017-7-14 Quartz glass occupies a special place among other forms of glass, since it possesses unique physical-chemical properties. The developers of new articles and users of quartz glass are attracted by the low linear thermal expansion coefficient, high UV and IR range of the spectrum, high heat resistance, good dielectric properties, high acid resistance, and so on.
MorePhysical and chemical methods of quartz sand purification ...
2021-5-3 The complexation method is to use quartz powder after acid leaching, the acid can form coordination compounds with impurity ions in the solution, so that the impurity ions in the solution can be further removed. Both physical and chemical methods play an irreplaceable role in the whole process of quartz sand purification.
MoreADVANCED PURIFICATION OF INDUSTRIAL QUARTZ
2019-7-2 Purification of quartz using an environment-friendly method is important in the contaminants removal. This paper presents advanced method based on calcination pretreatment combined with ultrasound-assisted leaching, for removing iron impurities from industrial quartz. The solvent used is a mixture comprised by diluted hydrochloric acid and ...
More
Quartz Knowledge 久智光电子材料科技有限公司
3.2.1 Flame Fused One-Step Method Quartz powder is fused by flame of hydrogen and oxygen on the special lathe equipment, to directly make quartz tube or quartz crucible. The Products from this process have features of big size tolerance and rough
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