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        <title>Sintering Alpha Aluminium Oxide (a-AI2O3) Need a Binder</title>
        <description> Hello,

I hope I&#039;m in the proper place, please let me know if I should be on another Forum for this.

Here is my question, if I have a deposition head like this Universal Past Extruder: [www.thingiverse.com] 

And I have Alpha Aluminium Oxide powder (a-AI2O3 @ 10um), what do I use as a binder?  &quot;Darvan C&quot; or some slurry with Dextrin powder? If it&#039;s the Dextrin what do I add to it... Water?

If I use one of them as a binder would I use a Laser or IR to Sinter before adding a new layer of powder and hardener? If so at what concentration or spec? The Ceramics are for a Piezo application.

I&#039;m trying to print some green ceramics and will be firing them after so the binder doesn&#039;t need to be permanent, any suggestions, links, or tips are greatly appreciated.

Thanks in advance for your help and time,

Rob</description>
        <link>https://reprap.org/forum/read.php?215,403460,403460#msg-403460</link>
        <lastBuildDate>Mon, 13 Apr 2026 04:28:49 -0400</lastBuildDate>
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        <item>
            <guid>https://reprap.org/forum/read.php?215,403460,404959#msg-404959</guid>
            <title>Re: Sintering Alpha Aluminium Oxide (a-AI2O3) Need a Binder</title>
            <link>https://reprap.org/forum/read.php?215,403460,404959#msg-404959</link>
            <description><![CDATA[ @crob09: tks, and no worries if you can't disclose it's source.]]></description>
            <dc:creator>A2</dc:creator>
            <category>MetalicaRap</category>
            <pubDate>Mon, 08 Sep 2014 22:22:34 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?215,403460,404791#msg-404791</guid>
            <title>Re: Sintering Alpha Aluminium Oxide (a-AI2O3) Need a Binder</title>
            <link>https://reprap.org/forum/read.php?215,403460,404791#msg-404791</link>
            <description><![CDATA[ I actually didn't procure it, an engineer at my work did and I'm not sure if he'll share that info; he may have a concern about Intellectual Property so I can ask but please note that I'm limited on what information I can provide. <br />
if I disclose the wrong thing it may cost me my employment, but I will ask and will get back to you if I'm able.<br />
<br />
Hope you understand.<br />
<br />
Rob]]></description>
            <dc:creator>crob09</dc:creator>
            <category>MetalicaRap</category>
            <pubDate>Mon, 08 Sep 2014 12:34:47 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?215,403460,404130#msg-404130</guid>
            <title>Re: Sintering Alpha Aluminium Oxide (a-AI2O3) Need a Binder</title>
            <link>https://reprap.org/forum/read.php?215,403460,404130#msg-404130</link>
            <description><![CDATA[ @crob09:<br />
Where did you purchase the Alpha Aluminium Oxide powder (a-AI2O3 @ 10um)?<br />
tks.]]></description>
            <dc:creator>A2</dc:creator>
            <category>MetalicaRap</category>
            <pubDate>Sat, 06 Sep 2014 15:43:51 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?215,403460,403869#msg-403869</guid>
            <title>Re: Sintering Alpha Aluminium Oxide (a-AI2O3) Need a Binder</title>
            <link>https://reprap.org/forum/read.php?215,403460,403869#msg-403869</link>
            <description><![CDATA[ Thank you Viktor! <br />
<br />
I'll look into the dexpanthenol and give it a try!<br />
<br />
This is Vitamin B5?? Interesting stuff!]]></description>
            <dc:creator>crob09</dc:creator>
            <category>MetalicaRap</category>
            <pubDate>Fri, 05 Sep 2014 19:01:23 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?215,403460,403806#msg-403806</guid>
            <title>Re: Sintering Alpha Aluminium Oxide (a-AI2O3) Need a Binder</title>
            <link>https://reprap.org/forum/read.php?215,403460,403806#msg-403806</link>
            <description><![CDATA[ ... for a laser-brazing project some years ago I've mixed different powders with dexpanthenol (and some water for adjusting the fluidity) and preheated and sintered/brazed the paste with a 9Watt IR-laserdiode ...]]></description>
            <dc:creator>VDX</dc:creator>
            <category>MetalicaRap</category>
            <pubDate>Fri, 05 Sep 2014 16:41:05 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?215,403460,403460#msg-403460</guid>
            <title>Sintering Alpha Aluminium Oxide (a-AI2O3) Need a Binder</title>
            <link>https://reprap.org/forum/read.php?215,403460,403460#msg-403460</link>
            <description><![CDATA[ Hello,<br />
<br />
I hope I'm in the proper place, please let me know if I should be on another Forum for this.<br />
<br />
Here is my question, if I have a deposition head like this Universal Past Extruder: [<a href="http://www.thingiverse.com/thing:20733" target="_blank"  rel="nofollow">www.thingiverse.com</a>] <br />
<br />
And I have Alpha Aluminium Oxide powder (a-AI2O3 @ 10um), what do I use as a binder?  "Darvan C" or some slurry with Dextrin powder? If it's the Dextrin what do I add to it... Water?<br />
<br />
If I use one of them as a binder would I use a Laser or IR to Sinter before adding a new layer of powder and hardener? If so at what concentration or spec? The Ceramics are for a Piezo application.<br />
<br />
I'm trying to print some green ceramics and will be firing them after so the binder doesn't need to be permanent, any suggestions, links, or tips are greatly appreciated.<br />
<br />
Thanks in advance for your help and time,<br />
<br />
Rob]]></description>
            <dc:creator>crob09</dc:creator>
            <category>MetalicaRap</category>
            <pubDate>Thu, 04 Sep 2014 19:07:15 -0400</pubDate>
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