Simatupang, Lisnawaty
Universitas Negeri Medan

Published : 2 Documents
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Uji Fisis Bahan Isolator Listrik Berbasis Keramik Porselin Alumina

EINSTEIN Vol 4, No 2 (2016): EINSTEIN
Publisher : Universitas Negeri Medan

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Abstract

Abstrak Telah dilakukan Fabrikasi pengaruh komposisi alumina untuk pembuatan keramik alumina porselin sebagai bahan isolator listrik. Bahan baku yang digunakan adalah campuran dari  Kaolin , Kuarsa , Feldsfar  dan Alumina (Produk Jerman, 99%), dimana komposisi alumina divariasikan yaitu 0%, 5%, 10%, 15% dan 20% berat total seluruh bahan. Suhu pembakaran divariasikan yaitu 1100oC, 1200oC, 1300oC, 1400oC dan 1500oC, pada masing-masing suhu ditahan selama 2 jam. Berdasarkan pengujian densitas, porositas, dan  termal ekspansi,  terlihat bahwa persentase alumina memberikan pengaruh terhadap sifat fisis keramik alumina.   Kata Kunci : Porselin, Alumina, Isolator Listrik , Sintering

The difference of student’s activities and learning outcome with problem based learning using macromedia flash and handout

JURNAL PENDIDIKAN KIMIA Vol 10, No 3 (2018): December 2018
Publisher : JURNAL PENDIDIKAN KIMIA

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Abstract

This study aimed to determine the difference of student’s activities and learning outcome with PBL using macromedia flash and handout. The sample were selected using purposive sampling into experimental group I and experimental group II with 60 students. The experimental group I used the PBL using macromedia flash, while the experimental group II used the PBL using handout. The results indicated that the mean scores of student’s activities and learning outcome in the experimental group II were significantly higher than those in the experimental group I. Thus, there was a difference in student’s activities and learning outcome.  The correlation test between student’s activities and learning outcome presented that the experimental group I rcount>rtable (0.625>0.361) and the experimental group II rcount>rtable (0.683>0.361), it concluded that there was a positive correlation between student’s activities and learning outcome with PBL using macromedia flash and handout.Keywords:activities; difference; handout; macromedia flash; learning outcome; PBL