Containment element comprising mullite or a polymorph of mullite, assembly comprising same, method of making same and method of using same
A container component, mullite technology, applied in chemical instruments and methods, methods of chemically changing substances by using atmospheric pressure, and manufacturing tools, etc., can solve problems such as limited mineral resources and pyrophyllite phase transitions.
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example 1
[0044] The cylinder of the sealed compartment of the belt-shaped ultra-high pressure furnace vessel can be made by mixing talc powder, mullite powder and sodium silicate dissolved in water as a binder in a mixer. The mixture may include 75% by weight talc, 15% mullite and 10% sodium silicate solution, the latter having a solids content of about 45% by weight.
[0045] When a homogeneous mixture of granules is obtained, the mixture is packed into a deformable cylindrical mold with a central rod and compacted with an isopress of 150 MPa. The roughly compacted tube was fired at 800°C for six hours and then cooled and machined to final dimensions.
[0046] The resulting high-density, high-strength cylinders can be used as external insulation and pressure transmission media in a uniaxial ultra-high pressure generation facility for the production of synthetic diamond at 5.7GPa, 1300°C .
example 2
[0048] The cylinder of the sealed compartment of the belt-shaped ultra-high pressure furnace can be made by mixing talcum powder, kyanite powder and sodium silicate dissolved in water as a binder in a mixer. The mixture may comprise 70% by weight talc, 20% kyanite and 10% sodium silicate solution, the latter having a solids content of about 45% by weight.
[0049] After obtaining a homogeneous mixture of granules, the mixture was packed into a deformable cylindrical mold with a central rod and compacted at an isostatic pressure of 180 MPa. The rough compacted tube is fired at 800°C for six hours and then cooled and machined to final dimensions.
[0050] The resulting high-density, high-strength cylinders can be used as internal insulation and pressure transmission media in uniaxial ultra-high pressure generation equipment for the production of synthetic diamond at 5.7GPa, 1300°C .
example 3
[0052] The cubic element of the airtight chamber of the cubic ultra-high pressure press can be made by mixing talc powder, kyanite powder, mullite powder and sodium silicate dissolved in water as a binder in a mixer. The mixture may include 65% by weight talc, 7% kyanite, 18% mullite and 10% sodium silicate solution, the latter having a solids content of about 45% by weight.
[0053] When a homogeneous mixture is obtained, the mixture is packed into a deformable cubic mold with a central rod and compacted at an isostatic pressure of 180 MPa. Roughly compacted cubes with cylindrical pores were cured at 200°C for six hours before being cooled and machined to their final size and shape.
[0054] The resulting high-density cubes can be used as combined insulation, pressure transmission and gasket media in a cube ultra-high pressure generation press system for the production of synthetic diamond at 5.7GPa, 1300°C . Properties of talc, kyanite, mullite and binder mixtures such as ...
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