Wide Ceramic Tape Sintering With Horizontal Tension Control
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Solution Overview
Problem
Existing sintering technologies face challenges in producing wide, long, and thin ceramic tapes without distortion or breakage, particularly due to turbulent air flow and thermal stress during binder removal and sintering processes, which hinder roll-to-roll processing and downstream applications.
Innovation Solution
A system and process that includes a vacuum drum for controlled tape separation, a horizontal processing path with controlled tension, and independently controlled heating zones to minimize air flow distortion and thermal stress, allowing for precise control of tape handling and sintering conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional sintering technologies are used to process wide, long, and thin ceramic tapes, then the tapes can be produced, but they suffer from distortion and breakage due to turbulent air flow and thermal stress
Solution Approach 1:
The sintering process is divided into multiple independently controlled heating zones along the horizontal processing path. Each zone can be controlled separately to manage thermal gradients and reduce thermal stress on the tape during sintering.
Solution Approach 2:
The system implements dynamically adjustable tension control throughout the processing line, allowing tension levels to be optimized at different stages of heating and sintering to prevent tape deformation while maintaining process stability.
2Strength
If high tension is applied to the carrier web during tape separation, then the carrier web can be effectively tensioned for separation, but the green tape may deform under the increased tension
Solution Approach 1:
A peeler mechanism serves as an intermediary device between the vacuum drum and the take-up reel, enabling effective carrier web tensioning while protecting the green tape from excessive tension forces through controlled separation geometry.
Solution Approach 2:
The system replaces direct mechanical tension transmission to the green tape with a vacuum holding system on the drum, which secures the tape without applying deforming tension forces during the separation process.
3Ease of operation
If vertical processing paths are used for sintering, then gravity can assist material handling, but turbulent air flow causes distortion of the tapes
Solution Approach 1:
The system inverts the conventional vertical processing approach by implementing a horizontal processing path for sintering, eliminating gravity-assisted material handling concerns while preventing turbulent air flow induced distortion through horizontal orientation.
Solution Approach 2:
The horizontal sintering channel provides a controlled atmosphere environment that minimizes turbulent air flow effects on the tape during processing, creating a stable thermal and fluid environment for distortion-free sintering.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the production of high-quality, wide, long, and thin sintered ceramic tapes suitable for roll-to-roll processing with minimal distortion, facilitating high throughput and efficient use in downstream manufacturing processes.
Implementation Method 1
The vacuum drum comprises holes for applying suction to the carrier web to facilitate tensioning the carrier web
Implementation Method 2
The binder burnout station receives the green portion of the tape and chars or burns the organic binder as the green portion of the tape interfaces with heat from the heater
Implementation Method 3
the binder burnout station receives the green portion of the tape and chars or burns the organic binder
Implementation Method 4
a sintering station including an entrance, an exit, and a channel extending between the entrance and the exit. Heat within the channel sinters the inorganic material such that the inorganic material has a first porosity at the entrance and a second porosity at the exit that is less than the first porosity
Data Source
AI summary
A roll-to-roll sintering system for wide inorganic tape material may include a spool on which is wound a continuous tape material comprising a green tape material and a backing layer, a take-up reel, and a heating station including at least one furnace. The heating station is configured to receive an unwound length of the continuous tape. The heating station further includes a first curved section such that the continuous tape material is bent through a radius of curvature of 0.01 m to 13,000 m, and at least two rollers defining the first curved section over which the continuous tape material is bent. The heating station is controlled to provide at least a portion of the heating station with an air free atmosphere, that being at least one of vacuum, hydrogen, or helium.